双索面弯塔宽幅斜拉桥抗震分析

以郑州望龙西双索面弯塔宽幅斜拉桥为研究对象，采用大型有限元软件ANSYS建立桥梁的空间杆系有限元模型，进行了桥梁的动力特性分析，得到其固有频率和振型特点等模态参数；采用时程分析和反应谱法两种不同的方法对宽箱梁斜拉桥的地震响应进行了分析。结果表明：两种分析方法得到的地震响应规律相同，横桥向地震荷载作用对桥梁地震响应影响较大。本文的结果可为同类型桥梁的抗震设计提供理论参考，具有一定的工程应用价值。

Seismic Analysis of Double Cable Plane Curved Pylon Wide Box Girder Cable stayed Bridge

Wang Long Xi double cable planes curved pylon cable stayed bridge in Zhengzhou is taken as an example in this paper. The finite element model of the whole bridge based on beam element is established by using the finite element software ANSYS. The dynamic characteristics, seismic performance and other aspects of the long span cable stayed bridge are studied.The vibration frequencies and mode of the bridge are calculated. The time history analysis method and the response spectrum method are used to analyze the seismic performance of the bridge respectively. The results show that similar consequence can be acquired by the time history analysis method and the response spectrum method and the seismic response of the bridge is stronger under the transverse earthquake action than the longitudinal earthquake action, which can be used as a reference for seismic design of such kinds of bridges.