大跨度预应力连续梁桥抗震性能分析

Seismic performance analysis of long span prestressed continuous beam bridge

对于大跨度预应力连续梁桥,在地震作用下,结构的动力响应分析是保证桥梁安全运营的必要。以某大跨度连续梁桥为实例,采用Midas/Civil大型有限元分析软件建立主桥的计算模型,对支座进行模拟,同时针对桩基和土体之间的作用特性,桩土作用模拟为空间弹簧,并采用反应谱法对结构进行抗震计算。根据计算结果,对连续梁桥的抗震性能进行了分析,有利于同类型项目的抗震设计。

For long-span prestressed continuous girder bridges,the dynamic response analysis of the structure is necessary to ensure the safe operation of the bridge under earthquake.Taking a large-span continuous girder bridge as an example,the calculation model of the main bridge is established by Midas/Civil large-scale finite element analysis software,and the bearing is simulated.At the same time,according to the interaction characteristics between pile foundation and soil,the pile-soil interaction is simulated as a space spring,and the seismic calculation of the structure is carried out by response spectrum method.According to the calculation results,the seismic performance of continuous beam bridge is analyzed to provide reference for the seismic design of similar projects.