防灾减灾工程学报2017，Vol.37Issue(5)：740-747,8.DOI:10.13409/j.cnki.jdpme.2017.05.007
近断层地震作用下考虑P-△效应的混凝土结构响应分析
Response Analysis of Concrete Structure Considering the P-△ Effect due to Near-fault Earthquake Ground Motions
摘要
Abstract
The p-△ effect of structure will changed,because the near-fault earthquake ground motions has greater horizontal and vertical earthquake effect.First,the statistical analysis of the ratios of vertical-to horizontal acceleration response spectrum and vertical-to-horizontal peak acceleration from 537 series of earthquake records will exhibit the characteristics of near-fault earthquake ground motions.Secondly,we conduct the elastic-plastic analyze of concrete structure with the p-△ effect under near-fault ground motions with velocity impulse and near-fault ground motions and far-fault ground motions,analyse the influence of p-△ effect.Finally,we consider horizontal and vertical ground motion at the same time,analyse the influence of p-△ effect with vertical ground motion.Results indicate that near-fault earthquake ground motions have greater response spectrum value than usual,and it's unsafe to take vertical ground motion as 65 percent of horizontal ground motion in near-fault regions.Structure has greater earthquake response under near-fault ground motions with velocity impulse in the case of same peak acceleration value.But it's not obvious that structure response has p-△ effect.Due to the randomness and complexity of ground motions,the inertial force caused by vertical ground motions can increase the response of structure and may also reduce the response of structure.关键词
近断层地震动/混凝土结构/速度脉冲/p-△效应/竖向地震动Key words
near-fault earthquake ground motions/concrete structure/velocity impulse/p-△ effect/vertical earthquake ground motions分类
天文与地球科学引用本文复制引用
张振根,孙广俊,李鸿晶..近断层地震作用下考虑P-△效应的混凝土结构响应分析[J].防灾减灾工程学报,2017,37(5):740-747,8.基金项目
国家自然科学基金项目(51478222,51308293)资助 （51478222,51308293）
