大跨度连续刚构桥有限元建模与动力特性分析

Finite element model construction and dynamic characteristic analysis of a large-span continuous rigid-famed bridge

本文采用有限元软件ANSYS建立某大跨连续刚构桥有限元模型,通过该模型的模态分析结果和实桥的环境振动测试结果的比较,得出一些有意义结论。

In this paper, the three - dimensional finite element model （FEM） of a large - span prestressed concrete continuous rigid - famed bridge is established by using the general purpose finite element program ANSYS. The modal analysis in the FEM is performed to get the theoretical dynamic characteristics and the field test under ambient vibration of the bridge is also performed to get the dynamic characteristic testing result. Some important conclusions are obtained by comparing the theoretical result with the testing result.