中文摘要：

我国现行桥梁抗震规范《公路桥梁抗震设计细则》、《城市桥梁抗震设计规范》中反应谱计算有较大的差异性，故有必要按上述2种规范反应谱法来计算分析桥梁抗震特性的差异性，以提高实际应用的可靠性。文章运用M idas／civil有限元软件建立某钢结构连续梁桥模型，取地震基本烈度为7度、地震动峰值加速度为0.15 g地区为例，计算分析了该钢结构连续梁桥在不同规范反应谱法下的抗震受力特性。分析结果表明2种规范下的地震响应存在差异，但该差异与设计加速度反应谱函数的变化相一致。

英文摘要：

In view of the difference in the calculation of response spectrum method based on present Code for Seismic Design of Urban Bridges and Guidelines for Seismic Design of Highway Bridges in China ,it is necessary to compute the difference of anti‐seismic properties of bridges based on the two norms so as to improve the stability in practice .In this paper ,the model of a steel structure continu‐ous beam bridge is established by using Midas/civil finite element software .Taking the district with the earthquake intensity of 7 magnitude and the ground motion peak acceleration of 0 .15 g as an exam‐ple ,the difference of the anti‐seismic properties of the steel structure continuous beam bridge based on the two response spectrum methods is analyzed .The results indicate that there is difference in seismic response but the design acceleration response spectrum trends conform well based on the two norms .