高墩桥梁抗震时程分析输入地震波选择  

Selections of real ground motions in seismic history analysis for bridges with high columns

作　　者：王东升[1] 岳茂光[2] 李晓莉[1] 孙治国[1] 屈浩[1] 

机构地区：[1]大连海事大学道路与桥梁工程研究所,辽宁大连116026 [2]奥雅纳工程咨询(上海)有限公司,北京100020

出　　处：《土木工程学报》2013年第S1期208-213,共6页China Civil Engineering Journal

基　　金：国家自然科学基金(51178071);中央高校基本科研业务费项目(2011JC034)

摘　　要：提出考虑高阶振型影响的输入真实地震波选择方法以满足高墩桥梁抗震时程分析需求。首先在PEER强震记录数据库中选择满足震级、距离、加速度峰值及长周期特性的不同场地条件的备选地震波。其次根据场地条件以备选地震波反应谱与设计反应谱,在平台段与高墩桥梁前几阶周期点附近(平均)谱值的相对误差最小为双控指标(小于15%),确定具体的输入地震波以实现时程分析结果与(设计)反应谱分析统计一致性要求。以某百米高墩桥梁抗震时程分析为例验证建议选波方法的有效性。The method for selection of real records as input for time history analysis of bridges with high columns is presented. The earthquake records in PEER ground motion database are initially selected considering the earthquake magnitude,distance,PGA and long period characteristic. Then the average relative errors between each record spectrum and the design response spectrum at two period portions,which include the flat part and some lower-order mode periods of the bridge structures,are considered according to the site classification. If the errors are both less than 15% then the record is determined as the input for the dynamic analysis in order to meet the requirement of statistical consensus theory.The seismic analysis of a bridge with columns about 100m is illustrated as an example.

关 键 词：桥梁工程 时程分析 输入地震波 设计反应谱 统计一致 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]