三本桥梁抗震规范的反应谱计算方法的比较分析

Comparative Analysis on Three Bridge Seismic Codes Response Spectrum Computing Method

现今《城市桥梁抗震设计规范》、《公路桥梁抗震设计细则》以及《公路工程抗震设计规范》中反应谱计算有较大的差异性。以地震基本烈度为7度,地震动峰值加速度为0.15g地区为例,仅讨论规则桥梁在三种桥梁抗震设计规范情况下,采用反应谱法计算得出的E1地震作用下水平力。最后通过比较,得出桥梁结构在不同场地土以及不同地震动参数分区间三本规范的差异、比值大小及其变化范围。

Nowadays,response spectrum computing in ＇city bridge seismic design code＇ ＇highway and bridge seismic design details＇ and ＇highway engineering seismic design code＇ has great othernesses.Take the district of 7 magnitude quake and 0.15g ground motion peak acceleration as an example,only under the three bridges seismic design code,E1 lateral seismic force of regular bridge is computed by using response spectrum computing.Finally through comparing,the bridge structure difference in different site soil and difference in different grounds motion parameters interval three codes,the size of ratio,variation range are conclude.