支承体系对多塔矮塔斜拉桥横向地震响应的影响  

Influence of Support System on Transverse Seismic Response of Multi-tower Extra-dosed Cable-stayed Bridge

作　　者：邓治国 王琦 李建中[2] DENG Zhiguo;WANG Qi;LI Jianzhong(Shanxi Luqiao Bridge Tunnel Engineering Co.,Ltd.,Shuozhou 036005,China;School of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]山西路桥桥隧工程有限公司,朔州036005 [2]同济大学土木工程学院桥梁工程系,上海200092

出　　处：《结构工程师》2020年第4期52-57,共6页Structural Engineers

摘　　要：国内外对纵向地震输入下矮塔斜拉桥的支承体系进行过许多研究,结果表明,不同支承体系对矮塔斜拉桥的纵向地震响应有较大的影响,但在支承体系对多塔矮塔斜拉桥横向地震响应影响方面的研究很少。以一座典型多塔矮塔斜拉桥为背景,针对多塔矮塔斜拉桥结构特点,分别比较了塔梁固接、塔墩分离,塔墩固接、塔梁分离,塔、墩、梁固接三种不同支承体系横桥向地震反应特点,研究了采用摩擦摆支座减小多塔矮塔斜拉桥横向地震反应的效果。Many studies have been carried out on the support system of the extra-dosed cable-stayed bridge under longitudinal seismic input at home and abroad.The results show that different support systems have a great influence on the longitudinal seismic response of the extra-dosed cable-stayed bridge.However,there is little research on the influence of support system on transverse seismic response of multi-tower extra-dosed cable-stayed bridge.Based on the structure characteristics of a typical multi-tower extra-dosed cable-stayed bridge,this article compares differences of transverse seismic response of three different supporting systems.and the effect of using the double spherical bearing to reduce transverse seismic response of multi-tower dwarf tower cable-stayed bridge is studied.

关 键 词：多塔矮塔斜拉桥 支承体系 横向地震反应 

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]