行波输入下大跨度三塔悬索桥减震控制  

Seismic control of long-span triple-tower suspension bridge under travelling wave action

作　　者：王浩[1] 陶天友[1] 张玉平[1] 王春峰[1] 李爱群[1] Wang Hao Tao Tianyu Zhang Yuping Wang Chunfeng Li Aiqun(Key Laboratory of Concrete and Pre-stressed Concrete Structure of Ministry of Education, Southeast University, Nanjing 210096, China)

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京210096

出　　处：《东南大学学报（自然科学版）》2017年第2期343-349,共7页Journal of Southeast University：Natural Science Edition

基　　金：国家重点基础研究发展计划(973计划)青年科学家专题资助项目(2015CB060000);国家自然科学基金资助项目(51278104;51578151);中央高校基本科研业务费专项资金资助项目(2242015K42028);东南大学优秀博士学位论文培育基金资助项目(YBJJ1659)

摘　　要：为研究考虑行波效应的大跨度三塔悬索桥减震控制,以泰州大桥为工程背景,建立了该三塔悬索桥的有限元模型,探究了不同视波速下弹性索和黏滞阻尼器对三塔悬索桥减震效果的影响.研究结果表明:弹性索可有效控制中塔处塔梁相对位移,但边塔处塔梁相对位移可能不降反增,增幅甚至达到95.8%,若采用弹性索作为减震措施,建议只在三塔悬索桥的中塔处进行设置.在任意视波速条件下,黏滞阻尼器对各主塔塔梁相对位移均具有较好的控制效果.采用弹性索会使中塔塔底剪力呈倍数增加,而采用黏滞阻尼器时中塔塔底剪力的增幅不超过50%.因此,黏滞阻尼器比弹性索更适用于大跨度三塔悬索桥的减震控制.To study the seismic control of a long-span triple-tower suspension bridge considering the travelling wave effect,the Taizhou Bridge was taken as a research object and a finite element model of this bridge was established. The influences of the elastic cable and the viscous damper on the seismic control efficiency with different apparent wave velocities were investigated. The results showthat the elastic cable can effectively control the relative displacement between the main girder and the mid-tower,but the displacement at the side-tower has an increase up to 95. 8% instead of a decrease. If the elastic cable is utilized,it is suggested to be installed only at the mid-tower. At any apparent wave velocity,the viscous damper exhibits good control efficiency to the relative displacement between the main girder and the mid-tower. The shear force at the bottom of the mid-tower increases in multiples with the adoption of the elastic cable,while it increases no more than 50% with the utilization of the viscous damper. Therefore,the viscous damper is more suitable than the elastic cable in the seismic control of a long-span triple-tower suspension bridge.

关 键 词：三塔悬索桥 行波效应 减震控制 弹性索 黏滞阻尼器 

分 类 号：U441[建筑科学—桥梁与隧道工程] U448.27[交通运输工程—道路与铁道工程]