异型钢结构主塔斜拉桥的动力特性及地震响应分析  

Dynamic Characteristics and Seismic Response Analysis of Cable-Stayed Bridge of Deformed Steel Structure Main Tower

作　　者：崔德永 徐红玉[1] 梁斌[1] 张独远 周长青[2] 聂宁波[2] 

机构地区：[1]河南科技大学土木工程学院,河南洛阳471023 [2]中铁十五局集团有限公司一公司,西安710018

出　　处：《河南大学学报（自然科学版）》2015年第6期747-751,共5页Journal of Henan University:Natural Science

基　　金：河南省重点科技攻关项目(082102230026)

摘　　要：研究了某异型钢结构主塔斜拉桥的动力特性及地震响应.结合涡河三桥水滴形钢结构主塔斜拉桥的工程设计实例,采用大型有限元程序ANSYS建立整桥的等效梁索计算模型,研究了整桥的自振动力特性.选用ELCentro地震波输入,采用时程分析法对主塔进行了地震响应分析.结果表明:主梁、主塔的横桥向抗弯刚度较顺桥向小,主塔竖向刚度较大;在三向地震波激励下主塔的横桥向、顺桥向、竖向位移以及钢-混结合处的弯矩均能满足要求.研究结果为其抗震设计与施工提供了参考.Dynamic characteristics and seismic response of cable-stayed bridge of abnormal shape steel structure main tower in Guoyang city were investigated.The finite element program ANSYS was used to establish the equivalent model of the bridge,and then the dynamic characteristic of the bridge was discussed.In addition,the seismic response analysis（using EL-centro seismic wave input）was performed by employing the time history analysis method.The results show that bending stiffness of the girder and main tower crossing the bridge direction is smaller than the direction along the bridge.The vertical stiffness of main tower has a high level.Under the excitation of the three directions seismic wave,the bending moments crossing the bridge,along the bridge and vertical and the steelconcrete composite section in main town are all meeting the requirements.The results of this study provide the reference for the seismic design and construction of the structure.

关 键 词：斜拉桥 异型钢结构主塔 动力特性 EL-Centro地震波 地震响应 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]