简支梁桥抗震设计的研究——以江苏宿迁桥抗震设计为例

A Study on the Seismic Design of Simply Supported Girder Bridge-Exemplified by the Design of Suqian Bridge in Jiangsu Province

本文介绍了采用橡胶支座的简支梁桥抗震计算的理论、方法及抗震措施 ,并以江苏宿迁桥梁抗震设计为例 ,分析纵桥向、横桥向地震作用计算过程。计算结果表明 ,江苏宿迁桥梁在地震时 ,下部设计由地震作用控制 ,纵桥向、横桥向水平力均较大。研究结果表明 ,桥梁设计应在详细的调查基础上 ,把合理的抗震设计和有效的抗震措施结合起来 。

In this paper,the seismic computation method and earthquake protective measure of simply supported girder bridge using elastomeric bearing is introduced. Taking the seismic design of Suqian Bridge as an example,the calculation process of the earthquake action both in the longitudinal and transverse direction of the bridge is analyzed.Calculating results show that the design in the lower part of the bridge is controlled by the earthquake actions;the horizontal forces both in the longitudinal and transverse direction are relatively large.It can be concluded that the bridge design should be based on the detailed investigations and good effects can only be obtained by combining the rational seismic design with effective earthquake protective measures.