双向地震作用下不同结构体系斜拉桥的响应研究  

Study on the Response of Cable-stayed Bridges with Different Structural Systems Under Bidirectional Earthquakes

作　　者：张剑锋 程阿青 蓝先林 赵然 陈权川 ZHANG Jianfeng;CHENG Aqing;LAN Xianlin;ZHAO Ran;CHEN Quanchuan(Guizhou Provincial Transportation Planning,Survey and Design Institute Co.,Ltd.,Guiyang 550081,China;Guizhou Zhongjian Architectural Research and Design Institute Co.,Ltd.,Guiyang 550001,China)

机构地区：[1]贵州省交通规划勘察设计研究院股份有限公司,贵阳550081 [2]贵州中建建筑科研设计院有限公司,贵阳550001

出　　处：《交通科技》2024年第3期65-70,共6页Transportation Science & Technology

摘　　要：为探究不同结构体系斜拉桥在双向地震作用下的内力和位移响应变化规律,依托实际工程,运用midas有限元分别建立3种结构体系的斜拉桥模型,采用非线性时程分析法,对比分析3种结构体系斜拉桥的地震响应规律,结果表明:纵向+竖向地震作用下半漂浮体系斜拉桥的主塔和主梁位移响应均较大,刚构体系斜拉桥的主塔塔底内力响应最大,漂浮体系斜拉桥的主塔塔底内力响应最小;横向+竖向地震作用下半漂浮体系斜拉桥的主塔塔顶位移响应较大,主梁跨中横向位移响应最小;地震作用下半漂浮体系斜拉桥的受力性能更好,更合理。In order to explore the variation law of internal force and displacement response of cable-stayed bridges with different structural systems under the action of two-way earthquakes,according to the actual engineering,the cable-stayed bridge models of the three structures were established by Midas finite element software,and the seismic response laws of the cable-stayed bridges of the three structural systems were compared and analyzed by using the nonlinear time history analysis method.The results showed that the displacement response of the main tower and the main girder of the cable-stayed bridge with semi-floating system under the simultaneous action of longitudinal and vertical earthquake was larger,and the internal force response of the bottom of the main tower of the cable-stayed bridge with rigid system was the largest.The internal force response of the bottom of the main tower of the floating system cable-stayed bridge is the smallest.Under the simultaneous action of transverse and vertical earthquake,the displacement response of the top of the main tower of the cable-stayed bridge with semi-floating system is larger,and the lateral displacement response of the middle span of the main girder is the smallest.The mechanical performance of the cable-stayed bridge with semi-floating system under the action of earthquake is better and more reasonable.

关 键 词：斜拉桥 地震响应 结构体系 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U442.55[交通运输工程—道路与铁道工程]