Seismic performance evaluation procedure of asymmetric plan structures
LI Ning1, ZHAI Chang-hai2, XIE Li-li2,3
1.School of Civil Engineering,Tianjin University/Key Laboratory of Coast Civil Structure Safety,Minisitry of Education,Tianjin 300072,China;2.School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China;3.Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China
Abstract:
Plan asymmetry leads to lateral-rotational coupled effects on structural response characteristics.This investigation deals with a simplified method for performance estimation of structures with asymmetric plan.By 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 proposed.The modal pushover analysis (MPA) method for asymmetric plan structures is proposed.The target displacement is determined by constant strength spectrum.The 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 results.The proposed MPA procedure is reliable and effective for evaluating the performance of asymmetric plan structures.
Key words: rotation response modal pushover analysis nonlinear static analysis performance estimation plan asymmetric
DOI：10.11916/j.issn.1005-9113.2011.03.005
Clc Number:TU352.11
Fund:
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Seismic performance evaluation procedure of asymmetric plan structures
本站小编 哈尔滨工业大学/2019-10-23
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