独塔斜拉桥抗震性能分析  

Seismic Performance Analysis of Single Tower Cable-stayed Bridge

作　　者：张卫红[1] 

机构地区：[1]中铁大桥局集团有限公司设计分公司,武汉430050

出　　处：《交通科技》2016年第3期32-35,共4页Transportation Science & Technology

摘　　要：为对特殊桥梁进行抗震分析,以一座72.5m+62.5m不等跨预应力混凝土独塔双索面斜拉桥为工程背景,建立全桥三维空间有限元模型,在动力特性计算基础上,采用地震反应谱多维抗震分析方法,输入不同等级的地震动作用,对结构进行了抗震性能分析。分析采用基于纤维模型的截面弯矩-曲率弹塑性分析方法。计算结果表明,该独塔斜拉桥结构在E1和E2地震作用下具有良好的整体抗震性能。To provide a reference seismic analysis method for special bridges,a 72.5＋62.5munequal span single tower cable-stayed bridge was taken as the study background.The three-dimensional finite element model of the bridge was established,and its earthquake resistance performance was analyzed,based on dynamic characteristics of the structure system,with multi-dimensional seismic response spectrum under different seismic grade.The elasto-plastic analysis method of section moment-curvature curve based on fiber model was used.The results show that,the integrated seismic performance of the single tower cable-stayed bridge structure under earthquake action E1 and E2is good.

关 键 词：独塔斜拉桥 动力特性 地震反应谱 纤维模型 弹塑性分析方法 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]