斜拉桥模态测试与分析

Modal Test and Analysis of Cable-Stayed Bridge

桥梁结构的动力特性是结构抗震、抗风以及进行在线健康监测的基础。使用大型结构有限元分析程序建立杭州市文晖大桥三维有限单元模型,对大桥进行动力特性理论分析。计算结果与实桥脉动测试法(也称环境随机振动法)的测试结果相当吻合,验证了模型以及脉动测试法的有效性,也为大桥的进一步研究提供了依据。

Dynamic characteristics of bridge structure are the base of the structure on wind & seismic resistance and of on-line supervision. For theoretical analysis of dynamic characteristics of the Hangzhou Wenhui Bridge, three dimentional finite element models are set up with large-sized structural finite element analysis program. The computation result is identical to that tested with pulse testing method on actual bridge, showing the effectiveness of the models and the pulse testing method and providing basis for further research of the bridge.