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Modular projects can be of higher quality, a safer, faster and more predictable construction process, and less environmental nuisance compared to a traditional on-site project. High-rise projects seem to be particularly suitable for modular building methods, however there are still some process-related barriers. Research so far has not focused on collaboration forms for modular high-rise projects. This paper examines which collaboration form fits best for a modular high-rise project by conducting an international case study research. From the case studies it is debatable whether the current PDMs meet the need for modular concepts; modular buildings will benefit more from a long-term collaboration with fixed partnerships. This requires a complete different approach to the construction industry. Until then, the best match should be sought by matching the customer profile to the PDM characteristics. The most suitable PDM is dependent on the client profile that can be determined by 17 selection criteria.

Large quantity of water is required during the conventional curing methods. This becomes challenging in the areas facing water scarcity and for concreting work in high rise structures. In this work, we present a solution for the need of concrete which does not require extra water for curing. In the proposed solution, calcium lignosulfonate in different percentage was introduced as a self-curing agent in fresh concrete. The hardened concrete with calcium lignosulfonate was cured at ambient condition whereas the hardened concrete without calcium lignosulfonate was submerged in water for curing. The properties of fresh and hardened concrete with and without calcium lignosulfonate are compared. The results show a continuous increase in slump with the increase in calcium lignosulfonate, however, 0.3% calcium lignosulfonate is identified as an optimum percentage for desired mechanical property. The durability under saline environment is studied in term of loss in strength. Further, the change in strength is correlated with the mineralogical changes studied using X-ray diffraction results.

Rapid population growth tends to lead to the construction of tall buildings. It is thus necessary to study the influential parameters on the behaviour of tall structures due to wind action. Soil deformability is one parameter that can affect the aerodynamic behaviour of tall structures. In this work, the impact of wind on the standard tall building of the Commonwealth Advisory Aeronautical Research Council, placed on a raft footing, was numerically modelled using Abaqus software. The wind was defined by a power function in the boundary layer of the atmosphere. Stream turbulence was modelled using the implicit large eddy simulation technique and a co-simulation was used to exchange non-uniform loads from the fluid domain to the structural domain. The mechanical reaction of the footing–soil framework was modelled using a direct strategy. Infinite boundary conditions were added to the numerical model for simulation of free boundaries and appropriate contact elements for sliding and separation between subsurface components were considered. The fluid and structural solutions were compared with the mean and root mean square values of experimental estimations for an extensive range of reduced speeds. Numerical results for the framework with soil–structure interaction (SSI) were compared with those without SSI. The dynamic properties and reactions of the building subjected to wind loading were affected by the SSI and therefore engineers should consider these parameters to guarantee practical designs.

The reduction of energy consumption is a major issue nowadays that should be considered during the design process. High-rise buildings represent a building type with significantly high energy consumption. They serve typically as offices with fully glazed façades, generating considerable energy demand. This study aims to optimize the envelope and the shading systems of a high-rise office building (Middle Europe). For this purpose, multiple façade variants were tested by assessing the thermal and visual comfort, as well as energy demand. The IDA ICE 4.8 building energy simulation program was used for thermal and lighting modeling and to carry out building physics calculations. Results revealed the best performing, optimized façade configuration in terms of comfort and energy efficiency.

This paper evaluates the accuracy of bidirectional energy-based pushover (BEP) procedure in predicting approximate incremental dynamic analysis (IDA) results for medium- and high-rise structures. BEP provides approximate IDA curves under the simultaneous effect of the two horizontal components of ground motions and is applicable to both symmetric- and asymmetric-plan buildings. The method has already proven useful in low-rise buildings, and this study aims to evaluate its suitability for mid- and high-rise structures. Six steel structures were considered in this evaluation in two groups of 9- and 20-story buildings, with each group consisting of a symmetric, a one-way asymmetric, and a two-way asymmetric-plan building. The assessment was performed for 22 pairs of far-field ground motion records. The results revealed that the accuracy of the method was satisfactory to produce approximate IDA curves for all structural models. The method had similar accuracy in the asymmetric models as it did in the symmetric models, although the accuracy showed a tendency to decrease as the height of the building increased. BEP also provided reasonable estimates of the demands in both 'flexible' and 'stiff sides' of the asymmetric buildings as well as the demands over the height of the buildings.

Net-Zero Energy (NZE) buildings are gaining popularity globally as a solution to reduce operational energy usage and limit greenhouse gas emissions in the building industry. Their deployment is occurring rapidly as many countries are planning to make it mandatory for new developments. Despite the advancements in research in the various aspects of NZE, significant barriers do exist to its successful adoption and implementation, particularly with respect to high-rise residential buildings which are becoming a major portion of the housing supply in Australia. One of the challenges attributed to the achievement of NZEB performance is the uncertainty involved in selecting appropriate solution strategies that could deliver quality performances. This paper investigated strategies that can deliver NZE performance for high-rise residential buildings in Australia. A calibrated model of 26 storey high-rise apartment building with 396 units was prepared for detailed analysis of NZE strategies using building simulation. The impact of various interventions was evaluated across cities in five climate zones in Australia and a guideline for solution sets that can deliver the goal for each climate zone is presented. The findings show that NZE performance for high-rise residential buildings can be realised in Australia, albeit with some limitations. While the tropical, subtropical and cold temperate climates appear to be more challenging, proper design and optimisation of the envelope proved to be effective in overcoming the challenges imposed by the more demanding climates. The impacts of shading from neighbouring buildings and objects presented the largest impediment to energy production through the facade.

There are numerous software applications available to analyze and design massive projects in short time. Most of the software have 2-dimensional and 3-dimen- sional tools, while various structural engineers employ the use of the 3D analysis and design tools in their day-to-day tasks because of its ease to operate and graphical user interface. These tools help in modeling, analyzing, and design of structures much more efficient. Despite the availability of numerous software products, there are confusions on the software to be used in the analysis and design of specific building structures. There is a need of studying the strength and weakness of some of these software tools to help structural engineers in the selection of the best application in their daily tasks. The aim of this study is to investigate the structural analysis of high-rise building with ETABS and RSA software and compare the influences of the structural analysis results from the two software in design. The comparison between the axial forces and moment from the results of ETABS and RSA software are presented. Case studies are considered to analyze the structure with the gravitational loads and lateral loads due to wind load by the two software applications. The case studies include a thirty-stories reinforced concrete building frame. The results of the analysis of the frame are compared and their difference is presented. From the analysis, the results show that, the moments and forces presented from RSA are bigger than that of ETABS.

The application of 6D BIM and value engineering in a project is still very rarely studied because BIM is still a new discussion in the project planners' field. The key to the success of implementing BIM 6D is influenced by several factors which will be explained in this study. The purpose of this study was to determine the success factors for applying BIM 6D value engineering to the Façade project of high-rise office buildings in terms of reducing design costs, operating costs, and maintenance costs. Office Building. This factor will be a focus for stakeholders, especially the Office Building Façade project in Indonesia. Keywords: BIM 6D, building façade, Office building, RII.

A structure can be build with different building elements. These building elements are basic part to resist the various loads and stress acting on it. The Beam is on the basic and essential elements under it to resist the bending behaviour on the structure. The project deals with four different types of 17 storied structures are modelled by altering beam members having rectangular shape i.e. G+16 storied building with 3.50 meters height for each story is modelled and analysed. The plan dimension of all four buildings is kept same i.e. 15.15 m x 46.35 m each. These buildings are designed in accordance with the Indian Code of Practice for the design of earthquake resistant buildings. Base of the building were fixed. The height of the buildings is considered constant throughout the structure. The buildings are modelled using ETABSvr.2018. The model has been studied in the earthquake zone IV and soil type II. Keywords: ETABSvr.2018, Beam, zone IV, Soil Type II, altering beam members

Wind drift has a significant influence on the rainfall–runoff relationship in urban high-rise building areas since the oblique rainfall caused by the wind drift can interact with the building walls. However, the impact of the rainfall inclination angle on the rainfall–runoff process in urban high-rise building areas has not been studied. In this study, the relationship between wind and the rainfall–runoff process in such areas was explored. A theoretical framework has been developed to describe their relationship, including a computational fluid dynamics (CFD) method to obtain the relationship between wind speed and rainfall inclination and a newly derived equation to describe the relationship between rainfall inclination and the runoff coefficient. Subsequently, a laboratory scale model experiment was conducted to verify the proposed framework. The main results are that (1) the runoff coefficient calculated by the proposed theoretical framework is highly consistent with that obtained from the laboratory experiment, (2) the runoff coefficient of urban high-rise building areas increases with wind speed and the increase rate is linear with the tangent of the rainfall inclination angle, and (3) the change in the runoff coefficient for the experiment with larger raindrop is 0.047 when the wind speed increases from 0 to 5.9 m s−1, while that for the experiment with smaller raindrop is 0.064, which means that the rainfall with larger droplets is less influenced by the wind.

Out-of-home activities are critical for older adults’ health and quality of life. Using field observations and interviews, this study investigated what neighborhood environmental characteristics in...

Today, larger part of designs around us are built up concrete cement (RCC) outlined constructions. To forestall harm because of quake there is a need to foster powerful procedure to expand the strength and flexibility of elevated structures. Shear wall are steadier and more pliable and thus can bear more even loads. In this paper, we have proposed a relative report between block facade, shear divider and uncovered casing by using ETABS programming. This review is essentially centered around seismic conduct of G+12 building. The outcomes are talked about as far as base shear, sidelong relocation, story float, story solidness and normal period for every one of the three models. We find that shear wall has least parallel uprooting and least time span when contrasted and block facade and uncovered edge. Likewise, we track down that the shear divider model is more adaptable because of lesser float when contrasted and different models. The upsides of removal and float for shear wall is likewise not as much as block facade since the tallness of the structure increments. Keywords: shear wall, bare frame, Response spectrum, Earthquake, ETABS

Currently, high-rise buildings are being continuously constructed, and thus, it is necessary to predict evacuation safety in advance in case of emergency situations in high-rise buildings. However, current studies focus only on the movement of individuals in evacuation situations for predicting the final evacuation time. Therefore, in this study, a simulation of realistic evacuation in high-rise buildings was performed based on characteristics such as the physical stamina of evacuees. The evacuation simulation was performed on the world's tallest high-rise building, Burj Khalifa, and comparative verification was performed with and without consideration of the physical stamina of evacuees. The results of the simulation indicated that the total evacuation time significantly increases when physical stamina is considered. Hence, realistic evacuation in high-rise buildings is possible when the stamina of evacuees is considered.

This study entailed an evaluation of preferences of workers for aspects of realistic fire management services aimed at providing effective fire prevention and real-time response using conjoint techniques. The analysis of the responses indicated that a combination of real-time disaster-situation dissemination and real-time 3D indoor status information displays was preferred. For workers in both low and high-rise buildings, real-time disaster-situation dissemination within the building received the highest evaluation. Workers in low-rise buildings also showed a preference for the 3D indoor status information displays that provide optimal dynamic evacuation routes. Future studies will include demonstrations of such techniques through local governments to put realistic fire management services into practical use, promoting safe living environments from fire.

Underground projects for sustainable urban infrastructure development in India witnessed a positive breakthrough in last few years. Metro rail projects executed in cities like Mumbai have left with underground excavation methods as the lone choice for connecting localities due to the presence of huge traffic on the road. Bored cast in situ secant piles are being preferred as retaining wall for underground station excavation in cities like Mumbai, which experience shallower groundwater table, sound bed rock, presence of heritage and sensitive buildings with heavy traffic movements. One of the major challenges during construction of rock-socketed piles is to ensure adequate “socketing in rock” and pile termination as per design criteria. To overcome this challenge, it is important to identify key parameters involved with pile boring and develop guidelines as inadequate rock socketing creates problems of pile toe instability and increased pile movements causing damage to nearby structures during active stages of excavation. This paper presents a pile termination criteria based on borehole data analysis followed by identification of key parameters for ensuring rock socketing during construction of Mumbai Metro. Piling rig penetration rate is one of the key parameters selected and analyzed for around 180 piles. Developed guidelines helped in successful construction of more than 5000 piles without causing any damage to structures in the vicinity. The suggested pile termination criteria and guidelines will be helpful for other projects of similar litho-stratigraphic disposition and surrounded by sensitive, high rise and heritage structures in proximity.

More Australian families are choosing to live in private, inner-city, high-rise apartments. To date, the cooking and eating experiences of such families, and how their practices are shaped by the d...

PurposeThe aims and objectives of this research are to establish whether or not the transition into green building in high-rise construction is practical. This is after considering several perspectives including financial, economic, environmental, and social. This subsequently leads to an evaluation on whether or not the continuation with a standard conventional build of high-rise buildings remains to be the most feasible option. Such objectives, therefore, aim to allow for validation of how and why high-rise construction designs are impacted through green buildings effects.Design/methodology/approachThrough six defined steps, the methodology commences with an introductory section of what it means to build green. This section is further broken down to evaluate what factors are involved in constructing a green building. Furthermore, the life cycle energy (LCE) is used as a framework to evaluate the knock-on effects of green buildings and subsequent high-rise construction design implications.FindingsThrough defining the ongoing relationship of green materials and sustainable design, various implications for high-rise constructions were discovered. First and foremost, it was determined that the LCE is the central consideration for any high-rise building design. In evaluating the LCE, and overall operating energy of the 50-year cycle of a building was carried out. As the results showed, the operating energy represents around 85% of the total energy that is consumed at the end of the 50 years cycle of the building. Precise LCE calculation can lead to a more efficient design for high-rise buildings. As a result, an increased understanding of the current status of green buildings within the construction industry is paramount. This understanding leads to a better insight into the contributing factors to green building in high-rise construction and the construction industry in general.Originality/valueThe potential contribution that can be gained from this research is the awareness that is raised in the research and development of green buildings in high-rise construction. This can be achieved by using certain materials such as new energy-efficient building materials, recycled materials and so on. This research will contribute to defining a new way of sustainable buildings, particularly for high-rise construction. The outcome of the research will be beneficial for practitioners such as design engineers and other related professions.

Roll-over stability of tall buildings under wind loads is considered. The nonlinear nature of the problem is taken into account, including geometric, physical, and structural non-linearity. The problem is solved on the base of a system of linearized incremental equations of structural mechanics that describes the behavior of a system tall building - foundation soil. Several methods are examined for solving nonlinear problems of roll-over stability, specifically: 1) deformation method of systems equilibrium states tracing; 2) method of linearization of nonlinear equations and systems equilibrium states tracing; 3) method of linearization of nonlinear physical relations of a systems with constructive, static, geometric nonlinearity; 4) method of linearization of nonlinear physical relations of a system with constructive nonlinearity based on nonlinear incremental structural mechanics; 5) method of the deformation process tracing for a physically nonlinear soil base, given the increase of discharge zones and constructive nonlinearity. Each of these methods is used to solve a model task. These tasks take into account roll-over stability of high structures under action of wind loads. In general, the problem of roll-over stability of a high object can be represented as repeatedly nonlinear one with various types of non-linearity. In this regard, in the practice of high-rise buildings designing, it is necessary to develop scientifically and methodically substantiated methods of assessing roll-over stability, considering non-linear factors. Taking these factors into account will make it possible to assess the roll-over stability of a high-rise object more accurate.

Building Information Modeling has recently spread worldwide and is commonly used in construction projects. Whereas in Egypt, despite the fact of the increased awareness of the BIM, the actual use of BIM by consultants and contractors remains limited. BIM in Egypt is still in the development phase, and it requires more efforts to become widely used by construction societies. This research studies the effect of applying BIM in the design and construction stages of high-rise buildings, and how it increases the quality of co-ordinations between all disciplines, which affects directly the productivity of construction projects in high rise building. This research tries to find the ideal usage of BIM in the design and construction stages and to find out how the direct application of BIM in selecting structural design. The methodology used for this research approach depends on a detailed literature review, a field survey for the building information modeling in Egyptian construction field as it is intended to use the questionnaire answers from a group of engineers that used the technology and followed by statistical analysis of the collected responses to the questionnaire. The obtained results showed that using BIM technology in high rise buildings projects can increase the productivity and provided a high level of visualization that could be missed by traditional design methods. The term “build before you build” best describes how digital prototyping with BIM was used to test the design. It provided the opportunity to explore different options with the client.