上海地区地震动及场地效应对桥梁抗震的影响

对上海地区可能遭遇的典型地震动进行了 β谱曲线的分析与比较 ,进一步考察了场地效应的影响 ,并选取上海市内环线标准段和延安路 -成都路高架结构进行地震反应分析 ,对不同潜源、不同震级的地震动作用时的地震反应进行比较分析 .研究表明 ,上海地区桥梁应具有更高的抗震要求 ,建议针对上海地区特点对城市桥梁抗震规范的反应谱作适当修正

Earthquake Ground Motions and Site Effects on Seismic Performance of Bridges in Shanghai Zone

The response spectrums of typical earthquake ground motions in Shanghai zone are analyzed and compared, and the site effects on seismic performance of bridges is observed and studied. The seismic performance of two important bridges in Shanghai is assessed under different earthquake waves with different potential earthquake sources and different grades. The bridges in Shanghai zone, as it showed with the results, should have higher seismic capacity than normal bridges. The response spectrum in seismic code for urban bridges should be modified adequately.