建筑结构学报2017，Vol.38Issue(8)：74-82,9.DOI:10.14006/j.jzjgxb.2017.08.008
基于概率的单自由度体系震后残余变形计算
Seismic residual deformation analysis of single degree of freedom system based on probability
摘要
Abstract
The accurate estimation of seismic residual deformation is necessary for studying the post-earthquake structural performance and seismic design method including restorability of reinforced concrete (RC) structures.Based on the elasto-plastic time history response analysis of bilinear single degree of freedom (SDOF) systems with various parameters under 100 normalized ground motion records respectively,the influences of model parameters and ground motion uncertainty on seismic residual deformation and maximum elasto-plastic deformation of SDOF systems were studied,and the probabilistic calculation model of seismic residual deformation also was presented.The results indicate that the ratios of residual deformation dR to maximum elasto-plastic deformation dm for SDOF systems under different ground motion inputs presents obvious discreteness,and the dispersion degree is significantly associated with stiffness ratio,natural period,relative yield load coefficient and peak ground acceleration.The statistic distribution of dR/dm can be described well by the lognormal distribution,and the residual deformation of SDOF systems with given probability and seismic levels can be predicted using the proposed model.In addition,a typical example of RC singlecolumn bridge pier is presented to illustrate the methods of seismic residual deformation estimation and restorability assessment of SDOF systems.关键词
单自由度体系/弹塑性时程分析/残余变形/概率分布/可修复性Key words
single degree of freedom system/elasto-plastic time-history analysis/residual deformation/probability distribution/restorability分类
建筑与水利引用本文复制引用
张勤,贡金鑫,周继凯..基于概率的单自由度体系震后残余变形计算[J].建筑结构学报,2017,38(8):74-82,9.基金项目
国家自然科学基金项目(51508154),江苏省自然科学基金项目(BK20150803),中国博士后科学基金面上项目(2015M581711). （51508154）
