建筑结构学报2011，Vol.32Issue(12)：210-216,7.
高层隔震结构非平稳随机地震响应与动力可靠度分析
Non-stationary random response and dynamic reliability of high-rise seismic isolated structure
摘要
Abstract
Considering the non-stationary characteristics of the earthquake ground motion,the random seismic response of high-rise seismic isolated building is investigated using pseudo excitation method.The Bouc-Wen model and the stiffness degradation of Bouc-Wen model are used to simulate the hysteresis of the isolation layer and the upper structure,respectively.The nonlinear motion equation of the high-rise seismic isolation structure is established.And the system response for each moment is solved by precise integration method.The time-history response of each floor under non-stationary earthquake excitation is got.Based on the first passage criterion,the reliability index of each floor and the whole structure are calculated.Those theories are used to analyze random earthquake response of a high-rise base isolated structure under 8 and 9 degree rare earthquakes.The time-history variance of story displacements of the seismic isolated system substantially reduced,which is compared with the non-isolation system.The structural displacement responses have a strong non-stationarity and a significant time lag phenomenon.It is also found that the reliability index of each floor and the whole structure are significantly larger compared with that of traditional aseismic structures under rare earthquakes.It is proved that the high-rise seismic isolated structure has adequate security.The weak floor of the structure can be found by using the reliability theory.This method is instructive for structural performance design and state control.关键词
高层隔震结构/Bouc-Wen模型/非平稳随机响应/虚拟激励法/动力可靠度Key words
high-rise seismic isolated structure/Bonc-Wen model/non-stationary random response/pseudo excitation method/dynamic reliability分类
建筑与水利引用本文复制引用
孙臻,王曙光,王赟玉,刘伟庆..高层隔震结构非平稳随机地震响应与动力可靠度分析[J].建筑结构学报,2011,32(12):210-216,7.基金项目
国家自然科学基金重大研究计划项目 （）
国家自然科学基金项目 （）
建设部专题项目 （）
