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215 results on '"outriggers"'

2. Progressive collapse performances of outrigger-braced reinforced concrete buildings with transfer floor.

Author

Selman, Mehmet Efe

Abstract

This paper is mainly composed of a comprehensive evaluation and discussion on the progressive collapse performances of outrigger braced reinforced concrete structures with transfer floor. The effects of transfer floor existence, combined use of transfer floor and outriggers, outrigger locations on load redistribution, plasticity development and robustness of structural systems under the sudden failure of the element(s) are the fundamental issues that shape the content of this study. Within this scope, six reinforced concrete systems with transfer floor and differently located outriggers are modelled in SAP2000 finite element program. The pushdown curves are compared through the nonlinear static analysis. For external and corner column cases, the maximum load factors versus vertical drift ratios are obtained in systems with outriggers located at the midheight (0.5H) and top level (H), especially. The differences in deformation characteristics of transfer floor-element interface can be properly limited by modifying outrigger locations and combinations. The hinging development can be much more effectively controlled with outriggers close to the transfer floor. The same tendency is also observed while the vertical spacing between outriggers is decreased, particularly until 0.65H. The results support that the optimized outrigger use develops an efficient alternate load paths under the abrupt element failure. [ABSTRACT FROM AUTHOR]

Published
2024
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3. Seismic Design and Performance Assessment of a Super Tall Concrete Core Wall Building in Istanbul

Author

Sucuoğlu, Halûk, Çelik, Ozan Cem, Ansal, Atilla, Series Editor, Bommer, Julian, Editorial Board Member, Bray, Jonathan D., Editorial Board Member, Pitilakis, Kyriazis, Editorial Board Member, Yasuda, Susumu, Editorial Board Member, Kasimzade, Azer, editor, Erdik, Mustafa, editor, Kundu, Tribikram, editor, Sucuoğlu, Halûk, editor, and Clemente, Paolo, editor

Published
2024
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4. Feasibility of outrigger structural system for tall timber buildings: A numerical study.

Author

Hegeir, Osama Abdelfattah and Stamatopoulos, Haris

Abstract

Tall timber buildings are prone to serviceability problems (e.g. lateral displacements and wind-induced accelerations). This article investigates the feasibility of timber outrigger system to build up to 20 storeys using linear elastic finite element analysis and relevant European and international standards such as EN 1990, EN 1991-1-1, EN 1991-1-4, EN 1995-1-1 and ISO 10137. The location of up to two outriggers was optimised based on different serviceability criteria. Various outrigger layouts were investigated, and their stiffness demands were discussed. The efficiency of outrigger structures in reducing lateral displacements and wind-induced accelerations is highlighted. A feasibility study considering serviceability requirements was performed using different basic wind velocities, number of storeys and gravity loads. Although the focus of the article is on serviceability requirements, some ultimate limit state considerations (forces and stresses) were briefly discussed. The results demonstrate the feasibility of building up to 16 storeys under medium to high wind velocities. [ABSTRACT FROM AUTHOR]

Published
2024
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5. Assessment of the Outriggers and Their Stiffness in a Tall Building Using Multiple Response Spectrum

Author

Dwivedi, Shashank, Kumar, Ashish, Singla, Sandeep, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Vasant, Pandian, editor, Shamsul Arefin, Mohammad, editor, Panchenko, Vladimir, editor, Thomas, J. Joshua, editor, Munapo, Elias, editor, Weber, Gerhard-Wilhelm, editor, and Rodriguez-Aguilar, Roman, editor

Published
2023
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6. Effectiveness of Various Outrigger Systems of Different Structural Materials for Lateral Load Resistance in Reinforced Concrete High-Rise Buildings

Author

Nissanka, N. A. A. C., Fernando, A. M., Gamage, J. C. P. H., di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Dissanayake, Ranjith, editor, Mendis, Priyan, editor, Weerasekera, Kolita, editor, De Silva, Sudhira, editor, Fernando, Shiromal, editor, Konthesingha, Chaminda, editor, and Gajanayake, Pradeep, editor

Published
2023
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7. Canadian Seismic Design Considerations for Outriggers Used in High-Rise Buildings

Author

Lisa, Tobber, Saeed, Dehghani, Amirhossein, Amiri, di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Gupta, Rishi, editor, Sun, Min, editor, Brzev, Svetlana, editor, Alam, M. Shahria, editor, Ng, Kelvin Tsun Wai, editor, Li, Jianbing, editor, El Damatty, Ashraf, editor, and Lim, Clark, editor

Published
2023
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8. Optimal parameters for tall buildings with a single viscously damped outrigger considering earthquake and wind loads.

Author

Malik, Faisal Nissar and Kolay, Chinmoy

Subjects
WIND pressure, TALL buildings, WIND tunnel testing, GROUND motion, SEISMIC response, EFFECT of earthquakes on buildings, EARTHQUAKES
Abstract

Summary: Tall buildings suffer from low inherent damping and high flexibility. Therefore, a core‐outrigger system is often used to stiffen such buildings. A modified form, known as the damped outrigger system, wherein vertically oriented dampers are installed between outriggers and perimeter columns, has been recently developed to supplement the damping. This paper studies the efficacy of a viscously damped outrigger system through dynamic analysis of a 60‐story tall building subjected to nonconcurrent earthquake and wind excitations. Two ground motion sets (100 accelerograms) are used for the former and wind tunnel test data for the latter. Effects of three building parameters, namely, (i) the core‐to‐column stiffness ratio, (ii) the outrigger location, and (iii) the damper size, on the dynamic characteristics and seismic and wind responses are evaluated. Effects of damper nonlinearity on seismic and wind responses are also investigated considering energy‐equivalent nonlinear viscous dampers. Finally, the optimum values of these parameters are determined. For example, the optimum outrigger location is found to be between 0.6H to 0.9H, where H is the height of the building. The results also show that the damped outrigger system significantly outperforms the conventional one for seismic excitation, and it is very effective in reducing the wind‐induced floor accelerations, provided the parameters are chosen appropriately. [ABSTRACT FROM AUTHOR]

Published
2023
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9. Comprehensive Analysis of Outrigger System for High Rise Structures Subjected to Wind and Earthquake Loadings

Author

Priyanka, N. M., Abhilash, D. T., Ajay, H. A., Mohan, H. S., Apoorva, S., di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Nandagiri, Lakshman, editor, Narasimhan, M. C., editor, Marathe, Shriram, editor, and Dinesh, S.V., editor

Published
2022
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10. Seismic Analysis of High Rise Steel Structure with Outrigger Braced System

Author

Daniel, S., Visuvasam, J., di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Jayaprakash, Jaganathan, editor, Choong, Kok Keong, editor, and Anwar, Mohammed Parvez, editor

Published
2021
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11. Considerations on Loads Transmitted By the Bridge Inspection Installation on Support Structures

Author

Sescu-Gal Cristina, Savaniu Mihail, and Frâncu Cătălin

Subjects
bridges, cranes, bridge inspector, outriggers, Transportation engineering, TA1001-1280
Abstract

The inspection of bridges is an essential activity to maintain the viability and safe operation of these structures. The inspection process shall be carried out by visual means using special equipment called bridge inspector. The equipment is similar in design to mobile crane installations – crane lorries, with the rotating part in the form of a boom at the end of which is the work platform for personnel and tools. The structure of the arm has the shape of a lattice girder or beams with closed section (caisson); regardless of the type of construction there is at least one telescopable section. During use, the installation is positioned on the superstructure of the bridges, supporting it by means of folding or telescopic outriggers.

Published
2021
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13. Vibration reduction on a cantilever Timoshenko beam control subjected to combined effects of wind and earthquake loads using damped outriggers.

Author

Metsebo, Jules, Ndemanou, Buris Peggy, Chamgoue, Andre Cheage, and Kol, Guy Richard

Subjects
EARTHQUAKES, CANTILEVERS, ENERGY dissipation, FUZZY logic, ACOUSTIC vibrations
Abstract

This paper deals with the combined effects of wind and earthquake on the dynamic response of a cantilever structure. It is mainly composed of the core-structure, multi-outriggers with magnetorheological (MR) dampers localized at different levels along of the structure and perimeter of their interesting characteristics is their ability to add supplementary energy dissipation to the structural system. Exposed to combined wind and earthquake loads, the core-structure is modelled using a Timoshenko cantilever beam. The stochastic approach based on the statistic properties is employed to estimate the degree excitations of the two natural hazards. The peak Root-Mean-Square (RMS) are evaluated to quantify the optimal location of damped outriggers. Defined as the control algorithm based on human reasoning, the Fuzzy logic is used to select the appropriate current that feeds the control devices. The obtained results indicate that the application of the fuzzy logic further minimizes the effects of bending-moment and shear force. All of these enhance the performance of the whole structural response and lead to a significantly reduction of excessive vibration to an acceptable level. [ABSTRACT FROM AUTHOR]

Published
2021
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14. Seismic design of outrigger systems using equivalent energy design procedure.

Author

Yang, T.Y., Atkinson, Jeremy, Tobber, Lisa, Tung, Dorian P., and Neville, Bob

Subjects
EARTHQUAKE resistant design, WALLS, BUILDING performance, CONCRETE walls, DESIGN
Abstract

Summary: An outrigger system is an effective structural scheme that is commonly used in high‐rise construction to increase the stiffness of concrete core walls and to reduce the moment demand within the walls. Despite the on‐going use of outrigger systems around the world, a formal seismic design procedure is yet available. This paper presents an equivalent energy design procedure (EEDP) to design outrigger systems for seismic applications. Three prototype outrigger‐wall buildings of various heights are designed for Vancouver, Canada. Detailed finite element models are developed to assess the seismic performance of the prototype buildings and to assess the safety using the FEMA P695 methodology. The result shows that EEDP is an efficient method to design outrigger systems which results in structures that can achieve sufficient margin of safety against collapse and satisfy multiple performance objectives at different seismic hazard levels. [ABSTRACT FROM AUTHOR]

Published
2020
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15. Design of auxiliary robots for distribution network uninterrupted operation

Author

Wei Song, Zhaoyong Fan, Qing Zhou, Chengjiang Wang, and Dahong Wang

Subjects
stability, mobile robots, design engineering, power grids, power distribution reliability, vehicle dynamics, collision avoidance, failure analysis, tops system, network-assisted robot design, vehicle stability, outriggers, insulation guarantee, tilting moments, turntable design, distribution network uninterrupted operation, actual operation requirements, work buckets, reliable support, radial loads, axial loads, work safety support platform, power supply, mobile chassis, power failure, auxiliary robot, Engineering (General). Civil engineering (General), TA1-2040
Abstract

Here, the auxiliary robot for distribution network without power failure is designed. The robot includes the design of mobile chassis, turntable, tops, and legs. The mobile chassis is responsible for walking, power supply, and work safety support platform. It can walk flexibly and has a certain ability to overcome obstacles. The turntable not only can withstand axial and radial loads, but also can withstand tilting moments. Tops can provide reliable support and good insulation guarantee for work buckets. Outriggers serve to level out and ensure the stability of the vehicle. The experimental results show that the design of the network-assisted robot without power failure can meet the actual operation requirements.

Published
2019
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16. AN INVESTIGATION ON RC HIGH-RISE STRUCTURES WITH AND WITHOUT OUTRIGGERS UNDER LATERAL STATIC LOADS.

Author

DEDEOĞLU, İbrahim Özgür, CALAYIR, Yusuf, and ARISOY, Bengi

Subjects
*DEAD loads (Mechanics), *LATERAL loads, *ARCHITECTURAL models, *WIND pressure, *EFFECT of earthquakes on buildings, *ANALYTICAL solutions, *EARTHQUAKE resistant design, *DIGITAL image correlation
Abstract

Today, the need of high-rise structures is rising throughout the world day by day. The package programs used in the modelling and analyzing of high structures are being renewed and improved every day. However, analytical solutions are still to be very helpful in the preliminary design of the building model. In this study, the analytical solution approach has assessed for the horizontal displacement determinations of the shear wallframed systems and shear wall-framed systems with outrigger systems under the static horizontal loads. For this purpose, two building models with 45 floors have been considered. The shear wall-framed system with outriggers has created by adding outrigger system to the shear wall-framed system in two levels. As the horizontal loads to the building models, the triangular distributed load representing the earthquake load and the uniformly distributed load representing the wind load have been applied. Displacement solutions of both models under horizontal loads have been performed using the analytical approach and ETABS program. The results of both models have been compared with each other and the validity of analytical solutions have been evaluated. Internal forces occurred in the both models under horizontal loads have been also assessed. The internal force solutions were obtained by using ETABS program. In addition, the effectiveness of the outrigger system has been examined. [ABSTRACT FROM AUTHOR]

Published
2020

17. Design of auxiliary robots for distribution network uninterrupted operation.

Author

Song, Wei, Fan, Zhaoyong, Zhou, Qing, Wang, Chengjiang, and Wang, Dahong

Subjects
POWER resources, ELECTRIC power distribution grids, MOBILE robots, FAILURE analysis, ELECTRIC insulators & insulation
Abstract

Here, the auxiliary robot for distribution network without power failure is designed. The robot includes the design of mobile chassis, turntable, tops, and legs. The mobile chassis is responsible for walking, power supply, and work safety support platform. It can walk flexibly and has a certain ability to overcome obstacles. The turntable not only can withstand axial and radial loads, but also can withstand tilting moments. Tops can provide reliable support and good insulation guarantee for work buckets. Outriggers serve to level out and ensure the stability of the vehicle. The experimental results show that the design of the network-assisted robot without power failure can meet the actual operation requirements. [ABSTRACT FROM AUTHOR]

Published
2019
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18. 某金融大厦斜交外网格塔楼结构设计.

Author

曾志和, 潘卫球, and 施永芒

Abstract

Copyright of Guangdong Architecture Civil Engineering is the property of Guangdong Architecture Civil Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2019
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19. Probabilidades de detectar rayos gamma o cósmicos por HAWC con el juego del embaldosado libre.

Author

Tetlalmatzi Montiel, Margarita, Rodríguez Torres, Erika Elizabeth, and Villarroel Flores, Rafael

Abstract

In this work the clean tile game of Buffon is associated with the probability that the observatory HAWC (High Altitude Water Cherenkov) detects showers created by cosmic rays and high energy gamma rays. For this, all possible cases of the clean tile game are analyzed. With the association, a simple model is provided to calculate the probabilities that the showers fall over HAWC and the ring of outriggers in three possible cases. Each case is studied assuming the region occupied by the observatory as square or hexagonal. It is concluded that, when considering hexagons, the probabilities are slightly higher, but it could be more effective to consider squares. The calculations only require basic geometry. [ABSTRACT FROM AUTHOR]

Published
2019
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20. Seismic design and evaluation of controlled rocking outrigger core wall (CROCW) system using equivalent energy design procedure (EEDP).

Author

Tobber, L., Yang, T.Y., and Najam, F.A.

Subjects
*EARTHQUAKE resistant design, *CONCRETE walls, *EARTHQUAKE zones, *BUILDING sites, *EARTHQUAKE intensity, *EFFECT of earthquakes on buildings, *EARTHQUAKE hazard analysis
Abstract

• A novel high-performance structural system for tall building application in high seismic zones. • Detailed equivalent energy design procedure for the newly proposed system has been presented. • The seismic performance of the proposed structural system is demonstrated using the detailed nonlinear time history analysis. In this paper, a novel earthquake resilient reinforced concrete core wall system named the controlled rocking outrigger core wall (CROCW) system is proposed. The CROCW consists of two high-performance seismic force resisting systems along its two principal axes. Along one principal axis is the controlled outriggered rocking wall (CORW), where an outrigger is situated at the roof and controlled rocking at the base. Dampers are incorporated within the outrigger and the rocking base to allow CORW to provide stable energy dissipation during earthquake excitation. Along the other principal axis is the self-centering coupled wall (SCCW). In the SCCW system, the self-centering friction dampers are incorporated within the coupling beams to dissipate the earthquake energy, while the base is designed to rock. The proposed CROCW system can be designed using the novel equivalent energy design procedure (EEDP). Four prototype buildings (two different building heights and two different building sites) were designed using the EEDP presented in this paper. The detailed nonlinear time history analysis was conducted to assess the performance of CROCW system. The results demonstrate that the CROCW system can be efficiently designed using the EEDP procedure to achieve a superior performance and low damage response at multiple levels of earthquake shaking intensities. [ABSTRACT FROM AUTHOR]

Published
2023
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22. 带端部阻尼器伸臂桁架的抗震性能试验研究.

Author

杨青顺, 甄伟, 陆新征, 解琳琳, and 林楷奇

Abstract

Copyright of Engineering Mechanics / Gongcheng Lixue is the property of Engineering Mechanics Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2018
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23. Reduction of vibration on a cantilever Timoshenko beam subjected to repeated sequence of excitation with magnetorheological outriggers.

Author

Ndemanou, Buris Peggy, Fankem, Eliane Raïssa, and Nana Nbendjo, Blaise Romeo

Subjects
TIMOSHENKO beam theory, EARTHQUAKE engineering, MECHANICAL stress analysis, VIBRATION (Mechanics), LYAPUNOV functions
Abstract

This paper deals with the statistical effects of an outrigger system on a cantilever beam under seismic excitation. The nonstationary random approach is employed to simulate seismic events. The Timoshenko beam approach is used to model the frame-core tube linked at a point of its length by the damped outriggers, therefore are connected vertically two magnetorheological damper devices. The peak root-mean-square values of displacement responses is employed as a best measure effective to specify the optimal locations of outriggers according to different vibration modes. To evaluate the performance of the control system, the control algorithm based on Lyapunov stability theory is adopted to seek the input voltage leading to the reduction of vibration. [ABSTRACT FROM AUTHOR]

Published
2017
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24. Frontiers in High-Rise Outrigger Design.

Author

Hi Sun Choi, Joseph, Leonard M., SawTeen See, and Garai, Rupa

Subjects
TALL building design & construction, TECHNOLOGICAL innovations, INDUSTRIAL efficiency, DAMPERS (Mechanical devices)
Abstract

In 2012, CTBUH published the first Outrigger Design for High-Rise Buildings Technical Guide. In 2016, the CTBUH Outrigger Working Group felt it would be beneficial to update the design guide with variations of outrigger systems and tall building projects that have been newly proposed or successfully implemented since that time. The Working Group reached out to colleagues to collect information on recently developed outrigger systems and real project examples that demonstrate their viability and value. The second edition of the guide, published recently in 2017, includes innovative approaches to address previously recognized design concerns and limitations. It also includes more project examples with new approaches to optimize building performance through dampers incorporated within outrigger systems. This paper summarizes the major updates of the second edition and highlights several projects of significance to the contemporary discussion of outrigger technology. [ABSTRACT FROM AUTHOR]

Published
2017

25. Stantec Tower: Shear Wall and Outrigger Design.

Author

Shoraka, Majid Baradaran, Woo, David, Archila, Manuel, and Flynn, Lanny

Subjects
SKYSCRAPER design & construction, DEEP foundations (Engineering), SHEAR walls, STRUCTURAL design
Abstract

This paper provides an overview of a progressive building under construction in western Canada in Edmonton. The paper also presents how boundaries in design and construction are being pushed, especially on what will be the tallest building in this region. The Edmonton Arena District Tower E Project (Stantec Tower) will be the tallest structure in western Canada; the tower is over 250 m tall and consists of 69 floors above the ground and four basement levels. The focus of the paper will be on the three major aspects of high-rise tower design: (a) wind engineering, (b) foundation design and (c) long-term lateral and vertical deflections and special techniques to overcome the complexity of each aspect. [ABSTRACT FROM AUTHOR]

Published
2017
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26. STUDI KONFIGURASI LAMBUNG KAPAL TRIMARAN DENGAN BANTUAN COMPUTATIONAL FLUID DYNAMIC (CFD)

Author

Samuel Samuel, Sarjito Joko Sisworo, and Mikhael Andreas Bangun

Subjects
Trimaran, outriggers, CFD, simetri, asimetri, Hambatan, Naval Science
Abstract

Kebutuhan kapal cepat meningkat untuk itu diperlukan kapal dengan bentuk lambungtrimaran. Kapal dengan bentuk lambung yang baik mempunyai hambatan kecil. Hal inimemberikan dampak baik untuk operasional dan olah gerak kapal. Penelitian ini bertujuanuntuk mendapatkan konfigurasi kapal Trimaran yang menghasilkan hambatan paling kecildengan menggunakan bantuan software Computational Fluid Dynamic (CFD). Denganmemprediksi posisi dan bentuk sidehull, maka akan didapat bentuk dan posisi sidehull yangefektif, sehingga bentuk aliran yang dilewati oleh kapal tidak menghambat laju kapal terhadapair. Posisi sidehull akan ditentukan secara memanjang, sementara bentuk sidehullmenggunakan bentuk simetris dan asimetris. Dari beberapa konfigurasi tersebut akandihasilkan satu model kapal yang baik. Penelitian ini menghasilkan hambatan yang terkecilpada konfigurasi kapal Trimaran simetri 1B (3,6 m) strut 2 m dengan kecepatan 15 knot,sementara pada kecepatan 25 knot, hambatan terkecil pada kapal simetri 1,25 B (4,5 m) strut 2m. Hambatan terkecil terdapat pada bentuk simetri pada setiap kecepatan.

Published
2013
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27. The building of a business center with a height of 140 m with outrigger structures

Subjects
аутригерные системы, многофункциональное здание, пояса жесткости, horizontal movement of the building, stiffening belts, outriggers, outrigger systems, аутригеры, multifunctional building, горизонтальное перемещение здания
Abstract

Тема выпускной квалификационной работы: «Здание бизнес-центра высотой 140 м с аутригерными конструкциями».В Ñ Ð¾Ð´Ðµ выполнения данной работы было изучено влияние Ð°ÑƒÑ‚Ñ€Ð¸Ð³ÐµÑ€Ð½Ñ‹Ñ ÑÑ‚Ð°Ð¶ÐµÐ¹ (поясов жесткости) на конструктивную систему высотного здания.Задачи, которые решались в Ñ Ð¾Ð´Ðµ исследования:1. Ознакомиться с типами Ð°ÑƒÑ‚Ñ€Ð¸Ð³ÐµÑ€Ð½Ñ‹Ñ ÐºÐ¾Ð½ÑÑ‚Ñ€ÑƒÐºÑ†Ð¸Ð¹;2. Произвести обзор литературы по теме исследования за последние 5 лет;3. Произвести обзор и сравнение Ð¿Ñ€Ð¾Ð³Ñ€Ð°Ð¼Ð¼Ð½Ñ‹Ñ ÐºÐ¾Ð¼Ð¿Ð»ÐµÐºÑÐ¾Ð², Ð¸ÑÐ¿Ð¾Ð»ÑŒÐ·ÑƒÐµÐ¼Ñ‹Ñ Ð´Ð»Ñ расчета Ð¸ÑÑÐ»ÐµÐ´ÑƒÐµÐ¼Ñ‹Ñ ÐºÐ¾Ð½ÑÑ‚Ñ€ÑƒÐºÑ†Ð¸Ð¹;4. Подбор оптимальной конфигурации и положения Ð°ÑƒÑ‚Ñ€Ð¸Ð³ÐµÑ€Ð½Ñ‹Ñ ÑÑ‚Ð°Ð¶ÐµÐ¹;5. Расчет модели в ПК;6. Оценка эффективности работы Ð°ÑƒÑ‚Ñ€Ð¸Ð³ÐµÑ€Ð½Ñ‹Ñ ÐºÐ¾Ð½ÑÑ‚Ñ€ÑƒÐºÑ†Ð¸Ð¹ по результатам расчета.В результате разработаны разделы проектной документации для 36-этажного здания бизнес-центра согласно заданию на проектирование и Постановлению Правительства РФ от 16 февраля 2008 г. № 87. Представлены разделы проектной документации в части планировочной организации земельного участка строительства, Ð°Ñ€Ñ Ð¸Ñ‚ÐµÐºÑ‚ÑƒÑ€Ð½Ñ‹Ñ Ð¸ ÐºÐ¾Ð½ÑÑ‚Ñ€ÑƒÐºÑ‚Ð¸Ð²Ð½Ñ‹Ñ Ñ€ÐµÑˆÐµÐ½Ð¸Ð¹, организации строительства и Ñ‚ÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ð¸ ÑÑ‚Ñ€Ð¾Ð¸Ñ‚ÐµÐ»ÑŒÐ½Ñ‹Ñ Ð¿Ñ€Ð¾Ñ†ÐµÑÑÐ¾Ð², мероприятий по обеспечению пожарной безопасности и доступа инвалидов, а также сметный расчет стоимости строительства., The subject of the graduate qualification work is "The building of a business center with a height of 140 m with outrigger structures."In the course of this work, the influence of outrigger floors (stiffening belts) on the structural system of a high-rise building was studied.Tasks that were solved in the course of the study:1. Familiarize yourself with the types of outrigger structures;2. Conduct a literature review on the research topic over the past 5 years;3. Review and compare the software systems used to calculate the structures under study;4. Selection of the optimal configuration and position of the outrigger floors;5. Calculation of the model in PC;6. Evaluation of the efficiency of outrigger structures based on the results of the calculation.As a result, sections of project documentation for a 36-storey building of a business center were developed in accordance with the design assignment and Decree of the Government of the Russian Federation of February 16, 2008 No. 87. Sections of design documentation are presented in terms of the planning organization of the construction land, architectural and design solutions, organization of construction and technology of construction processes, measures to ensure fire safety and access for the disabled, as well as an estimate of the cost of construction.

Published
2022
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28. High-rise apartment-hotel with outrigger structure

Subjects
апартамент-отель, high-rise frame building, metal braces, высотное каркасное здание, outriggers, аутригеры, закладные детали, apartment-hotel, металлические раскосы, embedded parts
Abstract

Тема выпускной квалификационной работы: «Высотные апартамент-отель с аутригерными конструкциями». В Ñ Ð¾Ð´Ðµ разработки выпускной квалификационной работы была разработана проектная документация для 32-этажного высотно апартамент-отеля , согласно заданию на проектирование и Постановлению Правительства РФ от 16 февраля 2008 г. № 87. Разделы выпускной квалификационной работы коротко можно сформулировать так: ÑÑ ÐµÐ¼Ð° планировочной организации земельного участка, Ð°Ñ€Ñ Ð¸Ñ‚ÐµÐºÑ‚ÑƒÑ€Ð½Ñ‹Ðµ и конструктивные решения, мероприятия для обеспечения доступа инвалидам, обеспечение пожарной безопасности, сметный расчет, проект организации строительства, Ñ‚ÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ñ‡ÐµÑÐºÐ°Ñ карта на устройство монолитной колонны. В Ñ€Ð°Ð¼ÐºÐ°Ñ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ñ‚ÐµÐ»ÑŒÑÐºÐ¾Ð¹ части была изучена наилучшая компоновка и положение Ð°ÑƒÑ‚Ñ€Ð¸Ð³ÐµÑ€Ð½Ñ‹Ñ ÐºÐ¾Ð½ÑÑ‚Ñ€ÑƒÐºÑ†Ð¸Ð¹ для Ð²Ñ‹ÑÐ¾Ñ‚Ð½Ñ‹Ñ Ð·Ð´Ð°Ð½Ð¸Ð¹ неправильной формы в плане. Сконструированы узлы крепления металлические Ð°ÑƒÑ‚Ñ€Ð¸Ð³ÐµÑ€Ð½Ñ‹Ñ Ñ€Ð°ÑÐºÐ¾ÑÐ¾Ð² к железобетонным колоннам через закладные металлические пластины. Для выполнения Ð¿Ð¾ÑÑ‚Ð°Ð²Ð»ÐµÐ½Ð½Ñ‹Ñ Ð·Ð°Ð´Ð°Ñ‡ в ПК SCAD OFFICE разработана пространственная модель каркаса здания, исследована совместная работа каркаса здания и Ð°ÑƒÑ‚Ñ€Ð¸Ð³ÐµÑ€Ð½Ñ‹Ñ Ñ€Ð°ÑÐºÐ¾ÑÐ¾Ð². Эффективность работы данной конструкции оценена по большей степени по критерию Ð³Ð¾Ñ€Ð¸Ð·Ð¾Ð½Ñ‚Ð°Ð»ÑŒÐ½Ñ‹Ñ Ð¿ÐµÑ€ÐµÐ¼ÐµÑ‰ÐµÐ½Ð¸Ð¹ здания., The topic of the final qualifying work: "High-rise apartment-hotel with outrigger structure". During the development of the final qualification work, design documentation was developed for a 32-storey high-rise apartment hotel, according to the design assignment and the Decree of the Government of the Russian Federation No. 87 dated February 16, 2008. The sections of the final qualifying work can be briefly formulated as follows: the scheme of the planning organization of the land plot, architectural and constructive solutions, measures to ensure access to disabled people, fire safety, estimate calculation, construction organization project, technological map for the device of a monolithic column. As part of the research part, the best layout and position of outrigger structures for irregularly shaped high-rise buildings in the plan were studied. The attachment points of metal outrigger braces to reinforced concrete columns through embedded metal plates are constructed. To fulfill the tasks set in the SCAD OFFICE PC, a spatial model of the building frame was developed, the joint work of the building frame and outrigger braces was investigated. The efficiency of this design is evaluated to a greater extent by the criterion of horizontal movements of the building.

Published
2022
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29. Seismic analysis of high-rise mega-braced frame-core buildings.

Author

Brunesi, E., Nascimbene, R., and Casagrande, L.

Subjects
*EARTHQUAKE resistant design, *SKYSCRAPERS, *FINITE element method, *NONLINEAR dynamical systems, *PROTOTYPES, *MECHANICAL buckling
Abstract

This work summarizes the results of a series of nonlinear dynamic finite element analyses devoted to assess peculiar aspects in the seismic response of high-rise mega-frame prototypes with outriggers and belt trusses. Thirty- and sixty-storey planar frames, extracted from reference three-dimensional structures composed of an internal symmetric braced core, were designed in accordance with European rules. The core consisted of a concentrically braced frame system, while outriggers were placed every fifteen stories to limit inter-storey drifts and second order effects. Numerical models able to account for material and geometric nonlinearities were developed within an open source platform, using inelastic force-based fibre elements to model structural members and mechanical idealizations to reproduce the behaviour of bolted beam–column and welded gusset-plate connections. Out-of-plane imperfections were explicitly included in the braces to allow for potential buckling mechanisms in both braces and gusset plates. Nonlinear time history analyses (NLTHAs) were performed, in comparison with response spectrum analysis (RSA), aiming to quantify the potential of such systems, when included in the lateral-force resisting system of modern high-rise moment resisting frames (MRFs). Global and local performance were investigated in terms of inter-storey drift and acceleration peak profiles, shear and bending moment demands, as well as axial force–displacement curves and static-to-seismic load ratios in critical braces at different floor levels. Sensitivity to the structure height was explored comparing the responses of the two prototypes. Trends were discussed to show that, if accurately designed and detailed in light of capacity design principles and performance-based design concepts, these systems provide an optimum combination of stiffness and strength. [ABSTRACT FROM AUTHOR]

Published
2016
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30. THE USE OF OUTRIGGER AND BELT TRUSS SYSTEM FOR HIGH-RISE CONCRETE BUILDINGS

Author

Po Seng Kian

Subjects
outriggers, high-rise buildings, wind load, earthquake load, optimum outrigger location., Engineering (General). Civil engineering (General), TA1-2040
Abstract

The outrigger and belt truss system is commonly used as one of the structural system to effectively control the excessive drift due to lateral load, so that, during small or medium lateral load due to either wind or earthquake load, the risk of structural and non-structural damage can be minimized. For high-rise buildings, particularly in seismic active zone or wind load dominant, this system can be chosen as an appropriate structure. This paper studies the use of outrigger and belt truss system for high-rise concrete building subjected to wind or earthquake load. Eight 40storey two dimensional models of outrigger and belt truss system are subjected to wind load; and five 60storey three dimensional models are subjected to earthquake load, analyzed and compared to find the lateral displacement reduction related to the outrigger and belt system location. For the two dimensional 40storey model, 65% maximum displacement reduction can be achieved by providing first outrigger at the top and second outrigger at the middle of the structure height. For the three dimensional 60storey structural model subjected to the earthquake load, about 18 % reduction in maximum displacement can be achieved with optimum location of the outrigger truss placed at the top and the 33rd level.

Published
2001

31. ANALYSIS OF OUTRIGGER STRUCTURAL SYSTEM FOR HIGH-RISE BUILDING SUBJECTED TO EARTHQUAKE LOADS

Author

V. BHARGAVI, MUPPIDI SANTHI DEVI, V. BHARGAVI, and MUPPIDI SANTHI DEVI

Abstract

Designing a high rise building has its challenges. Different structural systems have been developed to control the lateral displacement of high rise buildings. One of these systems is called the outrigger which decreases both the horizontal movement of the structure and the moment on the foundation of the structure. However the location of the outriggers has an immense influence on the efficiency of the structure. Outrigger optimization is a significant challenge. The objective of this thesis is to give a better understanding of outrigger locations and its efficiency of each outrigger when several outriggers are used in the structure and the behavior of outriggers. Tall building development has been rapidly increasing worldwide introducing new challenges that need to be met through engineering judgment. In modern tall buildings, lateral loads induced by wind or earthquake are often resisted by a system of coupled shear walls. But when the building increases in height, the stiffness of the structure becomes more important and introduction of outrigger beams between the shear walls and external columns is often used to provide sufficient lateral stiffness to the structure. The outrigger structural system is commonly used to control the excessive drift due to lateral load, so that, during small or medium lateral load due to either wind or earthquake load, the risk of structural and nonstructural damage can be minimized. For high-rise buildings, particularly in seismic active zone or wind load dominant. In this study two structural systems were considered, moment resisting frame system (bare frame) and outrigger structural system (with four configurations). A 40 story high rise building is modeled and performed analysis in ETABS 2017 software for all models and the results were compared in terms of lateral displacement, story drift and base shear.

Published
2021

32. Study of different structural systems for the design of tall buildings: dimensioning criteria and application to two cases of study

Author

Berlana, Jorge, Corres, Hugo, and Todisco, Leonardo

Subjects
Tall buildings, tipologías estructurales, parametric analysis, análisis paramétrico, tube in tube, outriggers, Edificios en altura, shear wall, structural typologies, framed tube
Abstract

The choice of the most appropriate structural system for a tall building is usually based on charts introduced by Khan in the 60’. In these charts each structural typology is associated with its limit height. However, the progress of construction methods and materials may vary the heights for which the systems are effective, allowing the limit height to be considerably increased in some systems. This paper analyzes the application of different typologies (framed tube, shear wall, tube in tube, outriggers) to the design of tall buildings. Dimensioning criteria are established for each structural system. In addition, parametric models are used to compare the different systems by applying them to two case studies, a 240-meter and a 480-meter high buildings. The results show that some structural typologies may achieve ranges higher that those proposed by Khan., La elección del sistema estructural más adecuado para un edificio alto suele establecerse en base a unas tablas introducidas por Khan en los años 60 que identifican unas alturas límites asociadas a cada tipología estructural. Sin embargo, el desarrollo de los procedimientos constructivos y de los materiales ha hecho que las alturas para los cuales los sistemas son eficaces varíen, permitiendo que para algunos sistemas la altura límite se vea incrementada considerablemente. En este artículo se analiza la aplicación de diferentes tipologías (framed tube, shear wall, tube in tube, outriggers) al proyecto de edificios altos. Se establecen unos criterios de predimensionamiento para los diferentes sistemas. Se utilizan modelos paramétricos para comparar los diferentes sistemas aplicándolos a dos casos de estudio, un edificio de 240 y otro de 480 metros de altura. Los resultados muestran que algunas tipologías ofrecen ventajas en rangos de alturas mayores a los descritos por Khan.

Published
2021
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33. Reconstruction of berth No. 7 of the Passenger port of St. Petersburg with the construction of outboard bays

Subjects
внешние нагрузки, Сваи-оболочки, external loads, выносные палы, Ð“Ð¸Ð´Ñ€Ð¾Ñ‚ÐµÑ Ð½Ð¸ÐºÐ°, mooring structure, Порты, расчет прочности, Санкт-Петербург, город, причальное сооружение, outriggers, sheet pile wall, шпунтовая стенка, strength calculation
Abstract

Цель работы – разработка Ð¿Ñ€Ð¾ÐµÐºÑ‚Ð½Ñ‹Ñ Ñ€ÐµÑˆÐµÐ½Ð¸Ð¹ по конструкции Ð²Ñ‹Ð½Ð¾ÑÐ½Ñ‹Ñ Ð¿Ð°Ð»Ð¾Ð² причала № 7 в морском порту «Пассажирский порт Санкт-Петербург». Задачи, которые решали в Ñ Ð¾Ð´Ðµ работы: - анализ Ð¸ÑÑ Ð¾Ð´Ð½Ñ‹Ñ Ð´Ð°Ð½Ð½Ñ‹Ñ Ð¸ определение Ð²Ð½ÐµÑˆÐ½Ð¸Ñ Ð½Ð°Ð³Ñ€ÑƒÐ·Ð¾Ðº на сооружение; - обоснование выбора типа сооружения; - выполнение чертежей и расчетов по конструкции; В Ñ Ð¾Ð´Ðµ работы был проведен анализ специальной Ñ‚ÐµÑ Ð½Ð¸Ñ‡ÐµÑÐºÐ¾Ð¹ литературы для реконструкции причального сооружения выполнены чертежи и проведен расчет Ð¾ÑÐ½Ð¾Ð²Ð½Ñ‹Ñ Ñ‡Ð°ÑÑ‚ÐµÐ¹ в программе SCAD Office. Актуальность магистерской диссертации обусловлена Ð½ÐµÐ¾Ð±Ñ Ð¾Ð´Ð¸Ð¼Ð¾ÑÑ‚ÑŒÑŽ реконструкции причала № 7 Пассажирского порта Санкт-Петербург для приема судов более высокого класса. Практическая значимость заключается в том, что сделанные выводы и рекомендации, будут полезны как исследователям, так и инженерам, работающим в отрасли Ð³Ð¸Ð´Ñ€Ð¾Ñ‚ÐµÑ Ð½Ð¸ÐºÐ¸., The purpose of the work is to develop design solutions for the construction of outriggers at berth No. 7 in the seaport "Passenger Port of St. Petersburg". Tasks that were solved in the course of work: - analysis of initial data and determination of external loads on the structure; - substantiation of the choice of the type of structure; - execution of drawings and design calculations; In the course of the work, an analysis of the special technical literature was carried out for the reconstruction of the berthing structure, drawings were made and the calculation of the main parts was carried out in the SCAD Office program. The relevance of the master's thesis is due to the need to reconstruct berth No. 7 of the Passenger Port of St. Petersburg to receive ships of a higher class. The practical significance lies in the fact that the conclusions and recommendations made will be useful to both researchers and engineers working in the hydraulic engineering industry.

Published
2021
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34. Multifunctional high-rise building with outriggers in St. Petersburg

Subjects
аутригерные системы, многофункциональное здание, пояса жесткости, lateral building movement, outrigger system, outriggers, аутригеры, ускорение Ð²ÐµÑ€Ñ Ð° здания, multifunctional building, building top acceleration, горизонтальное перемещение здания
Abstract

В Ñ Ð¾Ð´Ðµ выполнения данной работы были разработаны разделы проектной документации для 30-этажного многофункционального здания согласно заданию на проектирование и Постановлению Правительства РФ от 16 февраля 2008 г. № 87. Представлены разделы проектной документации в части планировочной организации земельного участка строительства, Ð°Ñ€Ñ Ð¸Ñ‚ÐµÐºÑ‚ÑƒÑ€Ð½Ñ‹Ñ Ð¸ ÐºÐ¾Ð½ÑÑ‚Ñ€ÑƒÐºÑ‚Ð¸Ð²Ð½Ñ‹Ñ Ñ€ÐµÑˆÐµÐ½Ð¸Ð¹, организации строительства и Ñ‚ÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ð¸ ÑÑ‚Ñ€Ð¾Ð¸Ñ‚ÐµÐ»ÑŒÐ½Ñ‹Ñ Ð¿Ñ€Ð¾Ñ†ÐµÑÑÐ¾Ð², мероприятий по обеспечению пожарной безопасности и доступа инвалидов, а также сметный расчет стоимости строительства. Кроме этого, в Ñ€Ð°Ð¼ÐºÐ°Ñ Ñ€Ð°Ð±Ð¾Ñ‚Ñ‹ было изучено влияние Ð°ÑƒÑ‚Ñ€Ð¸Ð³ÐµÑ€Ð½Ñ‹Ñ ÑÑ‚Ð°Ð¶ÐµÐ¹ (поясов жесткости) на конструктивную систему высотного здания. Целью данного исследования явилось выявление оптимальной конфигурации и положения аутригерного этажа для исследуемого объекта. Для достижения данной цели были поставлены следующие задачи: 1. Проанализировать имеющуюся по теме литературу; 2. Определить оптимальное положение аутригера в здании; 3. Определить оптимальную конфигурацию аутригера в плане и сечении. Для реализации Ð¿Ð¾ÑÑ‚Ð°Ð²Ð»ÐµÐ½Ð½Ñ‹Ñ Ð·Ð°Ð´Ð°Ñ‡ была разработана расчетная конечно-элементная модель здания в ПО SCAD Office, определены критерии оценки результатов и проведен ряд расчетов, на основании ÐºÐ¾Ñ‚Ð¾Ñ€Ñ‹Ñ Ð±Ñ‹Ð» сделан вывод о наиболее удачном виде аутригерной системы для исследуемого здания., Project documentation sections were developed as part of the qualification work according to technical requirement and Russian Government Resolution of 16 February 2008 № 87. Land parcel planning, architectural and structural design, construction organization and technology, fire safety, access by persons with disabilities and construction estimates modules are provided. In addition, outrigger systems impact on building structural system was analyzed. The purpose of the study was to determine optimal outrigger configuration and location in the building. The following goals were formulated: 1. Analyze related information sources. 2. Determine optimal outrigger location in the building. 3. Determine optimal outrigger configuration in plan and section. To achieve the goals set, finite element model in SCAD Office software was developed. Set of criteria was identified and number of calculations were made by using a model thereby to determine appropriate outrigger modification for the building.

Published
2021
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35. Outrigger placement in tall buildings using topology optimization.

Author

Lee, Soobum and Tovar, Andrés

Subjects
*TALL building design & construction, *TOPOLOGY, *STRUCTURAL optimization, *SHEAR strength, *SURFACES (Technology), *PROBLEM solving
Abstract

The burgeoning growth of tall buildings around the world requires novel design methodologies to resolve design challenges imposed by the enormous volume of material and energy employed during their construction and operation. To meet this upcoming social demand on tall buildings, practical and efficient design method is proposed for optimal outrigger placement using topology optimization. Outriggers, one of the key structural components in a tall and narrow building, are the horizontal structures which connect the building core (spine) and the exterior surface in order to improve the building's shear stiffness. In the proposed method, the high-fidelity simulation model of a tall building is constructed with multiple finite element types for the core and the reinforcing truss system. The floor-wise outriggers are parameterized using the Simple Isotropic Material with Penalization (SIMP) and defined as the design variables. The outrigger placement problem is solved using topology optimization. The continuation method is used for material penalization parameter in order to obtain "0-1" design. The versatility of the proposed design methodology is proven using the realistic FEM model of a three-dimensional 201m tall building. [ABSTRACT FROM AUTHOR]

Published
2014
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36. New York Times Building: Role of Selected Features.

Author

Grande, Ernesto, Imbimbo, Maura, and Testa, Rene B.

Subjects
*ARCHITECTURAL design, *ARCHITECT-designed houses, *BUILDINGS
Abstract

With a height of 52 stories and a steel structure visible from the exterior, the New York Times Building is the third-tallest building in the city of New York. Located on 8th Avenue between 40th and 41st Streets, it was designed by the Italian architect Renzo Piano. Two separate structures comprise the building: a 5-story podium rectangular in plan and a 52-story tower with a cruciform plan. Two interesting features of the structural system are the bracing system, located both on the perimeter and in the core, and the outrigger systems, located at the two mechanical floors. The effectiveness of these features, as well as the pretensioning of diagonals, is examined numerically in this paper by studying their influence on deflections due to wind, distribution of internal forces, and dynamic response of the building. [ABSTRACT FROM AUTHOR]

Published
2014
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37. Seismic Response of Structure with Single Core

Author

Belsare Sumit Bandopanth and Dilip Budhlani

Subjects
Shear walls, Single Core, Outriggers, Civil Engineering, FOS: Civil engineering
Abstract

Shear walls and outriggers have been used so far to resist the seismic waves of earthquake and heavy winds actions. The complete failure of the structures that has occurred in the past due to catastrophic earthquake may be avoided with the use of shear wall in the structure. The study is concerned with the use of shear wall as a single core in structure that will resist the seismic waves of earthquake. In the present study analysis of RCC building has been carried out by changing the locations of shear walls in the building. The seismic analysis performed is linear dynamic response spectrum analysis using the well known analysis and design software ETABS 16.2.0. Seismic performance of the building has been investigated based on parameters such as strorey drift, base shear and storey displacement. Belsare Sumit Bandopanth | Dilip Budhlani "Seismic Response of Structure with Single Core" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-3 , April 2020, URL: https://www.ijtsrd.com/papers/ijtsrd30851.pdf Paper Url :https://www.ijtsrd.com/engineering/civil-engineering/30851/seismic-response-of-structure-with-single-core/belsare-sumit-bandopanth

Published
2020
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39. Effect of Wind Load on Structural Performance of Dimensionally Regular & Irregular High rise Buildings with different Outrigger Systems

Author

Rohit B. Khade and Prof. Prashant M. Kulkarni

Subjects
Tall Buildings, High rise Buildings, Outriggers, Etabs, Wind, load, Wind Load
Abstract

Outriggers system is used as one of the best way of increasing the lateral stiffness and has been generally utilized in tall building structures. The outrigger system is very effective in increasing structure’s flexural stiffness. It is likewise viable in decreasing the horizontal top deflection and bending moments in the core of high-rise frame-core structures. This study presents the detailed analysis on how the top drift, inter-story drift, base moment in the core are influenced by the outriggers stiffness, outriggers optimum locations, columns axial stiffness and foundations flexibility. outrigger braced structures can strengthen a structure without disturbing its aesthetic appearance and this is a significant advantage over other lateral load resisting systems. The thesis compare between many outriggers systems including both concrete & steel Outriggers. The Rectangular shape & L- shaped building structures are taken for analysis. The study also presents simplified procedure to optimize the location of the outriggers that will result in a maximum reduction in the lateral displacement at the top of the building. The modeling of the structure is done using “ETABS” program. The investigation of the model is completed by comparable static technique. Finally, the thesis proposed a simplified analysis for outriggers structures with core for both regular and irregular high rise building.

Published
2019

40. Seismic design and evaluation of controlled outriggered rocking wall (CORW) using equivalent energy design procedure (EEDP).

Author

Tobber, L. and Yang, T.Y.

Subjects
*EARTHQUAKE resistant design, *EARTHQUAKE engineering, *EARTHQUAKE intensity, *ENGINEERING design, *REINFORCED concrete, *EARTHQUAKE hazard analysis
Abstract

• The novel controlled rocking outriggered wall (CORW) is introduced. • CORW is efficiently designed using the novel equivalent energy-based design procedure. • Simulation results show CORW is a reliable system for tall buildings applications. Next-generation earthquake engineering design seeks to develop robust structural systems to limit structural and non-structural damage after strong earthquake shaking. In this study, an innovative high-performance tall building, named Controlled outriggered rocking wall (CORW) system is proposed. The CORW system improves the conventional reinforced concrete (RC) core wall by adding a damped outrigger system and a damped controlled rocking base. The CORW is designed using the novel Equivalent energy design procedure (EEDP) to meet different performance objectives for different shaking intensities. Detailed EEDP for the CORW system is presented in this paper. Three prototype buildings (with 25, 35, and 45 stories) located in Vancouver Canada were designed using the proposed procedure. Robust finite element models of the CORW systems were developed in OpenSees and subjected to a series of nonlinear time history analysis. The results of the nonlinear time history analysis indicate that the CORW system designed using EEDP performs well under different levels of earthquake intensities, where it can be used reliably as an effective seismic force resisting system for high-rise application. [ABSTRACT FROM AUTHOR]

Published
2021
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41. Experimental Evaluation of the Dynamic Performance Benefits of Roll Stability Control Systems on A-train Doubles

Author

Kim, Andrew Eundong, Mechanical Engineering, Ahmadian, Mehdi, Nelson, Douglas J., and Southward, Steve C.

Subjects
ride stability, doubles, rollover, vehicle dynamics, roll stability, combination vehicle, A-train, controlled braking, outriggers, track testing, RSC
Abstract

The ride stability of an A-train 28-foot double tractor trailer when outfitted with different Roll Stability Control (RSC) systems with the same payload and suspension configurations is studied experimentally for various dynamic maneuvers. The primary goal of the study is to determine the effect of different commercially-available RSC systems on the extent of improvements they offer for increasing roll stability of commercial vehicles with double trailers, when subjected to limit-steering maneuvers that can rise during highway driving. A semitruck and two 28-foot trailers are modified for enduring the forces and moments that can result during testing. A load structure is used for placing the ballast loads within the trailers at a suitable height for duplicating the CG height of the trailers during their commercial use. Outriggers and jackknifing arresting mechanisms are used to prevent vehicle damage and ensure safety during the tests. The test vehicle is equipped with multiple sensors and cameras for the necessary measurements and observations. The analog and video data are time-synced for correlating the measurements with visual observation of the test vehicle dynamics in post-processing. An extensive number of tests are conducted at the Michelin Laurens Proving Grounds (MLPG) in Laurens, SC. The tests include evaluating each RSC system with different maneuvers and speeds until a rollover occurs or the vehicle is deemed to be unstable. The maneuvers that are used for the tests include: double lane change, sine-with-dwell, J-turn, and ramp steer maneuver. Both a steering robot and subjective driver are used for the tests. The test data are analyzed and the results are used to compare the three RSC systems with each other, and with trailers without RSC. The test results indicate that all three RSC systems are able to improve the speed at which rollover occurs, with a varying degree. For two of the systems, the rollover speed gained, when compared with trailers without RSC, is marginal. For one of the systems, there are more significant speed gains. Since most RSC systems are tuned for a conventional tractor-trailer, additional testing with some of the systems would be necessary to enable the manufacturers to better fine-tune the RSC control scheme to the dynamics of double trailers. MS

Published
2018

42. Projekt 30 etažne jeklene stavbe

Author

Sinanović, Adis and Može, Primož

Subjects
dimenzioniranje, structural systems, steel building, konstrukcijski sistemi, design, outriggers, okvir s povezji, udc:624.014.2:006.76(497.451.1)(043.3), jeklena stavba
Abstract

V sklopu magistrske naloge je obravnavana računska analiza in dimenzioniranje tipičnih elementov jeklene stavbe višine 119 m, ki se nahaja v Ljubljani. Zaradi višine stavbe statični sistemi, ki so bili v toku študija najbolj pogosto obravnavani (momentni okvir in okvir s vertikalnimi povezji), pri prenosu horizontalne obtežbe in zagotavljanju horizontalne togosti, ne zadostujejo in je potrebno uporabiti posebne statične sisteme, razvite posebej za gradnjo visokih stavb. Uporabljen je statični sitem okvirja z vertikalnimi in prečnimi povezji (outriggerji), katerega delovanje je opisano v poglavju 2. Računska analiza in optimizacija uporabljenih profilov je bila izvedena s programom Scia Engineer. Končni rezultati so bili preverjeni ročno po postopku denem v Evrokodu 3. Posebnosti pri analizi so izračun konstrukcijskega faktorja pri obtežbi vetra (cscd) in redukcijskega faktorja koristne obtežbe v odvisnosti od števila etaž nad obravnavanim elementom (αn). Oba faktorja, zaradi višine in geometrije stavbe, več nista enaka ena, temveč je po obravnavanih standardih dovoljeno znižanje obtežbe, vendar je končna analiza zaradi tega zahtevnejša. Na koncu je bilo preverjeno tudi mejno stanje uporabnosti konstrukcije. Zaradi višine stavbe, lahko obtežba vetra povzroči dinamično vzbujanje konstrukcije, to vodi do pretiranih vibracij, ki so za uporabnike stavbe lahko moteči. Končni pospešek je bil ocenjen s pomočjo poenostavljene metode dane v Evrokodu 1-4 in primerjan z omejitvami iz literature. Within the scope of the master's thesis, a global analysis and design of the typical steel elements of a building height of 119 m, which is located in Ljubljana, was performed. Due to the height of the building, the structural systems that were most frequently considered during the course of the study (shear frame and shear truss with vertical connections) were not sufficient for the transmission of horizontal loads and the provision of horizontal rigidity. Thus special structural systems, specially developed for the construction of high buildings, were used. Belt and outrigger trusses wre used. Their structural behavior is described in Chapter 2. The global analysis and the optimization of profiles was carried out using the program Scia Engineer. The final results were verified manually according to the procedure given in Eurocode 3. The peculiarities of the analysis include the calculation of the structural factor during wind actions (cscd) and the reduction factor of the imposed load, depending on the number of floors above the considered element (αn). Both factors reduce the actions, due to the height and geometry of the building, but according to the standards considered, the reduction of the load is permitted, which makes the final analysis more demanding. Finally, the serviceability limit state of the construction was also verified. Due to the height of the building, the wind actions can cause a dynamic excitation of the structure, which leads to excessive vibrations that can be disturbing for the users of the building. The final acceleration was estimated using the simplified method given in Eurocode 1-4 and compared with the limitations given in literature.

Published
2017

43. Assessment of wind-induced vibration mitigation in a tall building with damped outriggers using real-time hybrid simulations.

Author

Al-Subaihawi, Safwan, Kolay, Chinmoy, Marullo, Thomas, Ricles, James M., and Quiel, Spencer E.

Subjects
*HYBRID computer simulation, *TALL building design & construction, *TALL buildings, *EFFECT of earthquakes on buildings, *WIND speed, *PHYSICS laboratories, *TRUSSES, *SQUARE root
Abstract

• A 40-story building with damped outriggers is evaluated for wind-induced vibrations. • Damping ratio of the building is found to be 8.7% using real time hybrid simulation. • Dampers reduce the peak and RMS roof accelerations by 43% and 37%, respectively. • Members in the force path of the dampers must be stiff for dampers to be effective. This study examines the ability of damping devices placed between outrigger trusses and perimeter columns to mitigate dynamic vibrations in a tall building structure. The implementation of this approach to mitigate wind-induced vibrations for a 40-story building is assessed via a series of real-time hybrid simulations (RTHS), in which a numerical model of the complete building actively interfaces with physical dampers in the laboratory via actuators. In a RTHS, the overall structure is divided into analytical and experimental substructures, where the latter is challenging to model numerically and therefore evaluated in the laboratory as the experimental substructure. The experimental substructure for the RTHS in this study includes two full-scale nonlinear viscous dampers, and the rest of the building is modelled numerically as the analytical substructure. The coupling between the experimental and the analytical substructures is achieved in real time by enforcing compatibility and equilibrium between the two substructures during a simulation. Results of the RTHS show the feasibility of reducing the root mean square (RMS) and maximum wind-induced roof accelerations by up to 43% and 37%, respectively, when the building is subjected to a 700-year mean recurrence interval (MRI) storm with a 177 km/h basic wind speed. The stiffness of the members in the damper force path and the number of dampers play a major rule in controlling the wind induced vibrations. The results show that the as-built outrigger truss and column members require additional stiffening in order to maximize the benefit of adding the dampers to the building. There is a limit to the number of dampers that can be used beyond which minimal benefit is gained towards improving the performance of the building. RTHS are also used to estimate the equivalent viscous damping of the building with the outrigger damping system, which is found to be 8.7% of critical damping for the 1st mode of vibration. [ABSTRACT FROM AUTHOR]

Published
2020
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45. Indonesia and Africa: questioning the origins of some of Africa’s most famous icons

Author

Robert Dick-Read

Subjects
Mainland China, Zimbabwe, Xylophones, Indonesia. Madagascar. Zimbabwe. Nigeria. Srivijaya. Zanj. Zabag. Outriggers. Goldmines. Plantains. Xylophones. Bronze. Igbo-Ukwu, Nigeria, Outriggers, West africa, lcsh:Social Sciences, Goldmines, Race (biology), Igbo-Ukwu, Cape, Madagascar, Plantains, lcsh:Science, Central africa, Zabag, language.human_language, Indonesian, lcsh:H, Zanj, Geography, Bronze, Indonesia, language, Ethnology, lcsh:Q, Srivijaya
Abstract

In the author’s opinion there have been three far-reaching gaps in the study of Africa’s history: 1) Indonesian involvement in East and Central Africa; 2) Links between Madagascar and Eastern and South/Central Africa; and 3) Extension of Indonesian interest to West Africa, particularly Nigeria. He contends that Indonesians (the term applies to ‘Insular Southeast Asians’) may have begun regular trading to Africa when Greek and Roman demand for oriental spices developed several centuries BCE. The East African ‘Zanj’ were, in his view, an Afro/Indonesian race linked with the people of ‘Zabag’ - Sumatra and Java – later with Srivijaya in particular, whose interest in the gold, copper, iron and other products of Africa were extensive.Madagascar was only ever of secondary importance to Indonesians compared with mineral-rich Africa. But for centuries the Austronesian-speaking, Afro-Indonesian people of Madagascar maintained regular contact with the mainland giving rise to mixed societies, particularly in the Mozambique-Zimbabwe region. He believes the ancient Zimbabwe culture was in several ways linked with that of Madagascar, and that the vast ruin area of Nyanga was also connected. These cross-channel associations were gradually eclipsed by the domination of Arab-Shirazi colonisation down the East African Coast. There is a wealth of evidence that Indonesians rounded the Cape and sailed to West Africa. Several elements of Nigerian culture generally attributed to East-West overland movements or trans-Saharan Arab traders, are more likely to have reached the lower Niger regions by sea from Indonesia. Among these was the technology enabling the iconic ‘bronze’ artwork for which Nigeria is famous.

Published
2006

46. Análise tridimensional de um sistema de contraventamento misto aplicado em edifícios altos

Author

Lopes, Fábio André Frutuoso and Oliveira, Romilde Almeida de

Subjects
Edifícios Altos, Contraventamento Misto, Outriggers, Confort
Abstract

Este trabalho tem por objetivo analisar um sistema de contraventamento misto, composto por treliças passantes, também conhecidas como "outriggers", unidas rigidamente a pilares parede. A análise tridimensional foi efetuada através do método dos elementos finitos num edifício com 50 pavimentos, com pilares metálicos de alta resistência no contorno da edificação e pilares parede de concreto armado no centro da mesma. Para as lajes foi admitido o comportamento de diafragma rígido, onde a contribuição de sua rigidez à flexão foi considerada pelas vigas mistas, sendo estas vigas e os pilares, modelados por elementos de barra. O pré-dimensionamento dos elementos metálicos foi realizado de acordo com a NBR 8800. Os resultados obtidos pelos estados limites de utilização, considerando os casos de carregamento: peso próprio, sobrecarga, desaprumo e vento, permitiram avaliar a eficiência das treliças passantes através da redução dos deslocamentos laterais e dos momentos fletores, bem como, avaliar os cintamentos localizados nos níveis de posicionamento dos "outriggers", através da redistribuição os esforços axiais dos pilares metálicos. Apresenta-se, também, uma comparação dos resultados obtidos por meio das análises tridimensionais com o modelo plano simplificado encontrado na literatura técnica. Conclui-se que o sistema de contraventamento adotado no modelo proposto, apresentou-se adequado quanto aos deslocamentos limites e ao conforto humano estabelecidos pela NBR 8800, NBR 6123 e pelo projeto de revisão da NBR 6118/2001, e que os cintamentos modelados, além de proporcionar reduções nos esforços axiais dos pilares metálicos mais solicitados, caracterizam o sistema de contraventamento vertical principal na direção secundária. Para as comparações realizadas entre as análises tridimensionais e o modelo simplificado, verificou-se que os resultados dos esforços de momentos fletores apresentaram diferenças menores do que os deslocamentos laterais da edificação

Published
2003

47. Indonesia and Africa: questioning the origins of some of Africa’s most famous icons

Author

Dick-Read, Robert and Dick-Read, Robert

Abstract

In the author’s opinion there have been three far-reaching gaps in the study of Africa’s history: 1) Indonesian involvement in East and Central Africa; 2) Links between Madagascar and Eastern and South/Central Africa; and 3) Extension of Indonesian interest to West Africa, particularly Nigeria. He contends that Indonesians (the term applies to ‘Insular Southeast Asians’) may have begun regular trading to Africa when Greek and Roman demand for oriental spices developed several centuries BCE. The East African ‘Zanj’ were, in his view, an Afro/Indonesian race linked with the people of ‘Zabag’ - Sumatra and Java – later with Srivijaya in particular, whose interest in the gold, copper, iron and other products of Africa were extensive. Madagascar was only ever of secondary importance to Indonesians compared with mineral-rich Africa. But for centuries the Austronesian-speaking, Afro-Indonesian people of Madagascar maintained regular contact with the mainland giving rise to mixed societies, particularly in the Mozambique-Zimbabwe region. He believes the ancient Zimbabwe culture was in several ways linked with that of Madagascar, and that the vast ruin area of Nyanga was also connected. These cross-channel associations were gradually eclipsed by the domination of Arab-Shirazi colonisation down the East African Coast. There is a wealth of evidence that Indonesians rounded the Cape and sailed to West Africa. Several elements of Nigerian culture generally attributed to East-West overland movements or trans-Saharan Arab traders, are more likely to have reached the lower Niger regions by sea from Indonesia. Among these was the technology enabling the iconic ‘bronze’ artwork for which Nigeria is famous.

Published
2006

48. Vehicle Anchoring System.

Author

DEPARTMENT OF THE ARMY WASHINGTON DC, Celentino,J L, DEPARTMENT OF THE ARMY WASHINGTON DC, and Celentino,J L

Abstract

A vehicle anchoring device is made with a hydraulic cylinder which is mounted on the vehicle and adapted to extend and retract a mounting arm. The mounting arm has an attachment head loacated on the outboard end of the mounting arm which is adapted to engage on complimentary anchor so as to hold the vehicle in a fixed position even when subjected to a large environmental stress.

Published
1984

49. Break-Away Outrigger.

Author

DEPARTMENT OF THE AIR FORCE WASHINGTON D C, Graff,Albert J, DEPARTMENT OF THE AIR FORCE WASHINGTON D C, and Graff,Albert J

Abstract

An outrigger arm assembly to prevent a would-be intruder from successfully climbing over a fence. The outrigger arm assembly is mounted on top of the fence. Each hollow fence post is interconnected to a hollow outrigger arm by a replaceable collar which breaks when a load in the range of 20 to 30 pounds is applied to the outrigger arm, resulting in the downward movement of the outrigger arm, and the fall of the climber. The assembly also includes a movement sensor, within the hollow arm, which is activated and provides an alarm signal, when the outrigger arm is moved more than a predetermined number of degrees, such as the downward movement of the outrigger arm. The assembly further includes a coiled spring, positioned within the hollow fence post and extending into the hollow outrigger arm, by which the arm is automatically returned to its original defensive position, after the load is removed. (Author), Supersedes PAT-APPL-776 386-77.

Published
1978

50. Break-away Outrigger.

Author

DEPARTMENT OF THE AIR FORCE WASHINGTON D C, Graff,Albert J, DEPARTMENT OF THE AIR FORCE WASHINGTON D C, and Graff,Albert J

Abstract

An outrigger arm assembly to prevent a would-be intruder from successfully climbing over a fence is described. The outrigger arm assembly is mounted on top of the fence. Each hollow fence post is interconnected to a hollow outrigger arm by a replaceable collar which breaks when a load in the range of 20 to 30 pounds is applied to the outrigger arm, resulting in the downward movement of the outrigger arm, and the fall of the climber. The assembly also includes, a movement sensor, within the hollow arm, which is activated and provides an alarm signal, when the outrigger arm is moved more than a predetermined number of degrees, such as the downward movement of the outrigger arm. The assembly further includes a coiled spring, positioned within the hollow fence post and extending into the hollow outrigger arm, by which the arm is automatically returned to its original defensive position, after the load is removed.

Published
1977

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