基于概率的多点激励地震场强度参数研究  

RESEARCH ON EARTHQUAKE INTENSITY MEASURES OF MULTIPLE SUPPORT EXCITATION BASED ON PROBABILITY

作　　者：申彦利[1,2] 杨庆山[1] 田玉基[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]河北工程大学土木工程学院,河北邯郸056038

出　　处：《工程力学》2010年第1期202-208,共7页Engineering Mechanics

基　　金：国家自然科学基金杰出青年基金项目(50725826)

摘　　要：该研究建立了人工模拟地震场形成的记录库,通过建立简单的多点激励受力模型,应用增量动力分析和统计推论分析的方法分析了结构关注部位的响应谱加速度作为强度参数的适用性,研究了给定强度参数水平下结构工程需求参数的概率分布,评估了给定地震危险性水平下结构抗震性能。研究结果表明:响应谱加速度可以作为地震场的强度参数,并被用来进行基于概率的结构抗震性能评估。A suit of ground motion fields was established by simulation; with a simple structure subjected to multiple support excitations, and by using incremental dynamic analysis and statistic inference method, the applicability of response spectrum acceleration of the interesting part of the structure as intensity measure of ground motion field was studied, the probabilistic distribution of structural engineering demand parameters at given intensity measure level was studied and the seismic performance of the structure at a given seismic hazard level was estimated. The study shows that response spectrum can be regarded as the intensity measurement of a multiple-support excitation and can be used to perform probability-based structural seismic performance estimations.

关 键 词：多点激励 强度参数 基于概率 增量动力分析 统计推论 

分 类 号：TU375[建筑科学—结构工程] P315.9[天文地球—地震学]