防灾减灾工程学报2017，Vol.37Issue(5)：705-711,747,8.DOI:10.13409/j.cnki.jdpme.2017.05.002
地震持时和安全阈值对结构抗震可靠度的影响研究
Effect of Seismic Duration and Safety Bound on Structural Seismic Reliability
摘要
Abstract
In order to further grasp the structural reliability under earthquake,the effect of seismic duration and safety bound on structural seismic reliability are studied in this paper.Using MATLAB the random responses under the earthquake ground motion model of Gauss filtered white noise (Kanai-Tajimi spectrum) is analyzed.Then the exceeding probability of random response process is calculated using Poisson process method and Markov process method and Rayleigh extreme value distribution method.The calculation results of the three methods are similar,which show the change law of the structural dynamic reliability.The calculation results show that the structural dynamic reliability decreases when the excitation time increases.When the safety bound is greater than a certain value,the relationship between the dynamic reliability and the excitation time is close to linear.When the safety bound is less than that value,the relationship between the dynamic reliability and the excitation time is quadratically nonlinear.The structural dynamic reliability increases with the increasing of safety bound.The longer the excitations time,the steeper the curve between dynamic reliability and safety bound will be.The shorter the excitation time,the more smooth the curve between dynamic reliability and safety bound will be.关键词
抗震可靠度/随机响应/高斯过滤白噪声/地震持时/安全界限Key words
seismic reliability/random response/Gauss filtered white noise/seismic duration/safety bound分类
交通工程引用本文复制引用
张振浩,谭荣平,曹峰,周振国,杨伟军..地震持时和安全阈值对结构抗震可靠度的影响研究[J].防灾减灾工程学报,2017,37(5):705-711,747,8.基金项目
国家973计划项目(2015CB057706)、国家自然科学基金项目(51108044)、湖南省教育厅科学研究项目(15C0053)、长沙理工大学土木工程优势特色重点学科创新性项目(15ZDXK09)资助 （2015CB057706）
