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A macro-level global seismic damage model considering higher modes

Earthquake Engineering and Engineering Vibration 2014年第3期13卷 425-436页

作者： He Zheng Ou Xiaoying Ou Jinping Department of Civil Engineering Dalian University of Technology School of Civil Engineering Harbin Institute of Technology

For modal pushover analysis procedures, the model proposed by Ghobarah et al. （called the G model hereafter, 1999） has been extended to account for the contributions of transient higher modes to global seismic damage of structures excited by strong ground motions. The proposed model has physically and perfectly bridged the G model and the final softening model proposed by DiPasquale and Cakmak （1988）. modal damage indexes corresponding to all considered vibration modes are combined by the CQC rule or the SRSS rule. Incremental dynamic analysis （IDA） is performed on three example RC frames to validate the proposed model, and a comprehensive comparison is carried out. The demonstration indicates that the proposed model is easy to implement and reflects the influence of the transition in transient vibration periods and modes on structural damage evolution. Some limitations associated with the proposed model are also addressed. Further experimental validations are needed to improve the model in the future.

关键词： seismic damage modal pushover analysis incremental dynamic analysis

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Seismic performance evaluation procedure of asymmetric plan structures

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Journal of Harbin Institute of Technology(New Series) 2011年第3期18卷 21-26页

作者：李宁翟长海谢礼立 School of Civil Engineering Tianjin University/Key Laboratory of Coast Civil Structure SafetyMinisitry of Education School of Civil Engineering Harbin Institute of Technology Institute of Engineering Mechanics China Earthquake Administration

Plan asymmetry leads to lateral-rotational coupled effects on structural response *** investigation deals with a simplified method for performance estimation of structures with asymmetric *** taking the eccentric characteristics of structures into account,an equivalent triple-degree of freedom (ETDOF) system,which is constructed by eccentric mass,rigid links and springs,is *** modal pushover analysis (MPA) method for asymmetric plan structures is *** target displacement is determined by constant strength *** applicability of proposed method is discussed.A generic mass eccentric 4-story steel frame is analyzed by the proposed MPA procedure and nonlinear time history analysis (NTHA).The results show that the maximum deformation obtained from MPA has a good agreement with the NTHA *** proposed MPA procedure is reliable and effective for evaluating the performance of asymmetric plan structures.

关键词： rotation response modal pushover analysis nonlinear static analysis performance estimation plan asymmetric

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