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Copyright of Transportation Science & Technolgy is the property of Transportation Science & Technology 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.)

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.)

In order to ensure the safe operation of the nuclear power plant, seismic analysis must be conducted on the battery cabinets of nuclear power plants used for safety level emergency backup direct current (DC) power supply systems. Taking the battery cabinet of a certain nuclear power plant as the research object, the three-dimensional model and finite element analysis model of the battery cabinet were established. The natural frequency and mode shape results of the battery cabinet were obtained through modal analysis. The stress response of the battery cabinet model under the superimposed self-weight load safety shutdown earthquake (SSE) were calculated. The composite stress values of the three types of beams in the battery cabinet are all less than 1. The bending and membrane stress value of the battery cabinet baffle structure is 19. 6 MPa, and the maximum local stress value of the battery cabinet is 22.44 MPa. The composite stress value of the battery cabinet connecting bolts is close to 0. According to Design and construction rules for mechanical components of PWR nuclear islands (RCC-M standard), the composite stress of the beam, the stress of the baffle structure, the maximum local stress, and the composite stress of connected bolts for the battery cabinet all have a large safety margin compared to their allowable value. The design of the battery cabinet meets the requirements of the specification, and the battery cabinet can be applied to the floor where the mechanical and electrical building of a nuclear power plant is located. [ABSTRACT FROM AUTHOR]

Copyright of Railway Construction Technology is the property of Railway Construction Technology 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.)

Copyright of Transportation Science & Technolgy is the property of Transportation Science & Technology 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.)

Copyright of Transportation Science & Technolgy is the property of Transportation Science & Technology 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.)

Copyright of Nuclear Safety is the property of Nuclear & Radiation Safety Center 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.)

In order to solve the problems in the design of HFETR spent fuel storage rack, such as slow iterative design speed, long seismic analysis time and difficult multirack analysis, a combination of parameterization method and superelement method was proposed to analyze the HFETR spent fuel storage rack. Firstly, a finite element model for seismic analysis of HFETR spent fuel storage rack was established based on superelement method, and the calculation accuracy of the superelement model was verified by modal analysis. Then, APDL program and VB platform were used to parameterize the establishment and calculation of the finite element model of the rack, and the special analysis interface of the rack was established. Through this interface, the size and boundary conditions of the rack can be quickly modified, and the finite element model, analysis type and background calculation can be established quickly, which simplifies the modeling and analysis process of the iterative design of the rack. Finally, the multi-rack seismic analysis of HFETR spent fuel storage rack was carried out by using time-history analysis method. Two seismic working conditions (OBE and SSE) and three loading conditions (full load, half load and no load) were taken into account, altogether six combinations. In this paper, the performance of stress, slip and dumping of HFETR spent fuel storage rack under six combinations was analyzed. The results show that the stress of the rack meets the requirements under the six conditions, and the maximum stress of the base is generated under the condition of half load and SSE. In the six conditions, the slip displacement of the rack is small and no collision will occur. The slip amplitude of the rack is full load, half load and no load from small to large. In other words, the slip amplitude of the rack tends to decrease with the increase of the loading capacity of the spent fuel assembly. The designed rack will not topple under the six conditions. The dumping limit of the rack is the minimum at half load, and the height of the jump is the maximum at half load in the earthquake, so the possibility of the toppling is the maximum at half load in the earthquake, and the half load should be paid more attention to in the analysis of the toppling of the rack. In general, the seismic performance of the designed HFETR rack meets the requirements. The parameterizationsuperelement method can be applied to the seismic analysis of multiple racks and provide convenience for the iterative design of spent fuel storage racks.

In order to obtain the practical seismic design method of the metro station structure with large chassis of upper frame buildings, the influence law of upper frame building structure on seismic response of metro station structure was investigated based on series of numerical simulation experiments on dynamic interaction of soil-metro station with the upper frame building system and a simplified method called mode decomposition method-reaction acceleration method was proposed for the seismic design of seismic analysis of underground structure in the integrated structure system which refered to the basic principle of traditional reaction acceleration method as well. Firstly, the feasibility of mode decomposition-reaction acceleration method was verified theoretically, and the mechanical model and implementation steps of the proposed method were introduced in detail. Secondly, taking the integration project of subway station and upper cover high-rise building in a core area of Beijing as the background, the influence factors such as peak acceleration, structural stiffness, soil stiffness, upper cover structure height and seismic wave type were used to analyze computational accuracy of mode decomposition method-reaction acceleration method by comparing with the results of time history method and traditional reaction acceleration method. The results show that the proposed method is a simplified analysis method with simple operation, high accuracy and calculating results biased towards safety, which can be applied to the seismic calculation of similar projects. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology 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.)

Copyright of Atomic Energy Science & Technology is the property of Editorial Board of Atomic Energy Science & Technology 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.)

Copyright of Journal of Beijing University of Technology is the property of Journal of Beijing University of Technology, 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.)

Copyright of Transportation Science & Technolgy is the property of Transportation Science & Technology 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.)

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.)

In order to verify the seismic performance of the instrument support in Hua-long Pressurized Reactor ( HPR1000) nuclear power plant, the finite element model of the instrument support was established by ANSYS software. The static coefficient analysis method was selected for the seismic analysis of the instrument support. The instrument support was evaluated according to Design and Construction rules for Mechanical Components of PWR Nuclear Islands ( AFCEN RCC-M-2007 ). According to the calculation results, the structure optimization method of increasing the reinforcement plates was adopted for the instrument support. By comparing the maxi-mum stress ration of the instrument support under different sizes of reinforcement plates, the suitable plate size scheme was determined. The comprehensive evaluation results show that all the components of the optimized instrument support meet the requirements of Design and Construction rules for Mechanical Components of PWR Nuclear Islands (AFCEN RCC-M-2007) standard. The mechanical perform-ances of the instrument support under various working conditions are guaranteed. The proposed calculation method and structural opti-mization approach can provide reference for the design and analysis of similar supports. [ABSTRACT FROM AUTHOR]

[Introduction] In offshore engineering, we usually use SACS to do structural design, including earthquake working condition. There are major mistakes in the current seismic design process, which may lead to the occurring of serious consequences in the foundation design of jacket. Therefore, it is necessary to analyze current seismic design and correct the mistakes. [Method] Firstly, this paper introduced the recognized seismic analysis process, then introduced the particularity of seismic analysis with SACS software and expounded the inertial error and its serious consequences of using SACS for seismic analysis through comparative analysis. [Result] Based on the abnormal results of actual project, we predicted and solved the risk successfully, which all proved the seriousness of the current mistake in seismic analysis with SACS. [Conclusion] This study puts forward the correct method of seismic analysis in SACS, which provides an important basis for the structural design of offshore engineering.

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.)

Copyright of Nuclear Safety is the property of Nuclear & Radiation Safety Center 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.)

Copyright of Journal of Zhengzhou University: Engineering Science is the property of Editorial Office of Journal of Zhengzhou University: Engineering Science 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.)

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.)

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.)

Copyright of Nuclear Safety is the property of Nuclear & Radiation Safety Center 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.)

The design of nuclear power equipment is concerned with structural integrity and stability of the equipment in running process. Using the finite element analysis software, the stress calculation and seismic analysis were carried out on the fram structure of the air-cooled chiller unit in a nuclear power station. The calculation results show that the structure strength and bolts strength of the air-cooled chiller can meet the requirements of all working conditions. Finally some suggestions for the design of unit frame were put forward, which could provide reference for the optimization design and seismic performance improvement of air-cooled chiller in nuclear power plant in the future.

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology 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.)

In order to study seismic responses and collapse mode of a wind turbine tower under operational conditions, a wind turbine tower model was developed by the wind turbine design software FAST. The structural responses in idle condition and operational conditions were calculated and compared. The influences of different angles between wind and earthquake inputs on structural responses were investigated. A detailed finite element model of the same tower was developed with ABAQUS. Wind load effects induced by the blades were calculated by FAST simulations and were verified with the results estimated through the blade element theory. Elastic analysis results from the FAST model and the ABAQUS model were also compared for verification purposes. Tower collapse simulations were conducted under earthquake excitations using the ABAQUS model. Study results show that the case with a 90° angle between the wind and earthquake inputs is the most dangerous scenario that could occur for tower dynamic responses. Collapse simulations indicate that the plastic hinges are initiated from the bottom part of the tubular tower wall; later, they develop into the upper part of the structure too. The tower fails at the middle-upper part of the tower wall.

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.)

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology 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.)

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.)

Copyright of Tunnel Construction / Suidao Jianshe (Zhong-Yingwen Ban) is the property of Tunnel Construction 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.)

Copyright of Nuclear Safety is the property of Nuclear & Radiation Safety Center 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.)

To address the shortcoming of ignoring the presence of enclosure walls in seismic analysis of ancient timber frame buildings, the influences of the structural detailing, mechanical property and plan layout of the walls and timber frames on the seismic performance of the overall structure were examined. Based on the statistical information on earthquake disasters, the damage characteristics of the wall and timber frame were summarized, and the corresponding overall damage degree to the ancient building were described. By means of dynamic property site test and finite element analysis methods, the influence of the walls to the fundamental period and earthquake performance of the ancient building was also studied. The research results show that the walls in the ancient building have an evident contribution to the overall seismic stiffness of the structure, the fundamental period of the model including the walls is close to the fundamental period obtained from the site test. However, the fundamental period of the model ignoring the wall is much greater than the site test result, rendering unsafe design. According to seismic evaluation requirement for ancient buildings and considering the brittle behavior of the brick wall, a three-stage seismic analysis method based on displacement control and taking account of various cracked working conditions of wall, is proposed for ancient timber frame buildings. [ABSTRACT FROM AUTHOR]

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.)

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.)

In order to study the cable tension optimization problem of complex and long span cable stayed bridges and to study the influence of cable tension on seismic response of cable stayed bridges, a new strongly sub feasible SQP (Sequential Quadratic Programming) algorithm is proposed to establish a nonlinear mathematical programming model for automatic searching optimal cable forces, and the seismic dynamic analysis is carried out under different conditions. The results show that the new method is suitable for the optimization of cable tensions. The optimal cable tensions are in good agreement with the designed cable forces, and the bending moment distribution of the main girder is uniform. The main tower is mainly subjected to axial pressure, the bottom moment of the tower is small, and the deformations of the structure are much smaller than the standard limit values. The optimal cable tensions can effectively change the uneven distribution of the bending moments of the main beam, and reduce the longitudinal deformations of the main girder and the transverse deformations of the main tower so that the whole structure will be more secure under earthquake action. [ABSTRACT FROM AUTHOR]

Copyright of China Sciencepaper is the property of China Sciencepaper 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.)

Displacement and velocity pulses of near-field ground motions would yield larger storey drifts at the isolation layer of the structures, consequently the second order effects could not be neglected in this case. Firstly, based on a geometric stiffness matrix obtained by constructing the horizontal force couple to replace the additional moment induced by P-Δ effects, this paper represents a non-iterative method for evaluating performance of the inter-storey isolated structure considering P-Delta; effects; Secondly, the influences of near-field ground motions on the responses of the isolated system are investigated by analyzing the responses of the inter-storey isolated structure with 10 near-field and 10 far-field earthquake records, respectively; Finally, the impacts of P-Δ effects on the responses of the substructure under near-field ground motions are discussed. The results show that the responses of the inter-storey isolated structure increase significantly when subjected to near-field ground motions, P-Δ effects enlarge the responses of the substructure about 50% under the input earthquake ground motions with PGA=200cm/s². [ABSTRACT FROM AUTHOR]

Artificial non-stationary earthquake motions being compatible with the given coherency loss function and considering the correlated three-dimensional component are generated by trigonometric series method, and time history analysis model under multi-dimensional and multi-support excitations is established based on displacement direct input method. Seismic responses of two typical long-span spatial structures subjected to one-dimensional uniform excitation, one-dimensional and multi-support excitations and multi-dimensional and multi-support earthquake excitations are investigated. Furthermore, seismic responses of these structures under multi-dimensional and multi- support earthquake excitations with many cases of apparent wave velocities are comprehensively investigated and compared. The results show that the internal force responses of most bars in these two typical spatial structures under multi-support excitations are larger than those under uniform excitation. The amplitude changing of analytical results under multi-dimensional and multi-support excitations of long-span structure are close to those obtained by one-dimensional and multi-support excitations, but the latter is to give the unsafe values of the seismic responses. When different cases of seismic wave velocities are considered, responses of long-span structures change a lot under multi-dimensional and multi-support earthquake excitations. [ABSTRACT FROM AUTHOR]