高震区悬索桥动力特性及抗震性能研究

Study on Dynamic Characteristics and Aseismic Performance of Suspension Bidge in High Seismic Zones

为探索高震区大跨度桥梁的动力特性及抗震性能,本文以刘家峡大桥为例,通过建立空间有限元模型,对其动力特性及抗震性能进行研究,以保证结构的抗震安全和促进设计优化。研究表明,刘家峡大桥加劲梁、主缆的设计并不由地震作用控制,但是桥塔的设计由地震作用控制,能够满足规范要求。

To explore the dynamic characteristics and seismic performance of high long-span bridges in high seismic zones,based on Liujiaxia bridge engineering,the spatial finite element model is established,the dynamic characteristics and seismic performance are studied in order to ensure the structural safety and promote the design optimization. The research shows that the design of the stiffening girder and cables are not controlled by the earthquake,however,the tower design is controlled by seismic,it can meet the requirements of specification.