姚江大桥钢梁方案主桥的地震反应分析

Seismic response spectrum analysis of Yaojiang bridge

以姚江大桥钢梁方案为研究对象，采用有限元分析软件SAP2000建立了该桥的三维有限元模型并对其进行模态分析，在此基础上运用反应谱法计算了该桥的纵向、横向和竖向地震响应，探讨了主要结构参数对下承式钢桁架拱桥地震响应的影响。

Model for Yaojiang bridge is established, using the finite element analysis program SAP2000. Based on the model and the dynamical equation of M DOF structural system, model analysis and seismic response spectrum analysis are carried out by use of CQC, a vibration combination method and SRSS, a space combination method. The effects of primary structural factors on seismic response is studied.