高低塔悬索桥阻尼器减震性能振动台试验研究  

Shaking Table Studies of Damping Performance of Damper for High and Low Tower Suspension Bridge

作　　者：高文军[1,2] 郑万山[1,2] 黄福伟[1,2] 唐光武[1,2] GAO Wenjun;ZHENG Wanshan;HUANG Fuwei;TANG Guangwu(State Key Laboratory of Bridge Engineering Structural Dynamics,Chongqing 400067;China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067)

机构地区：[1]桥梁工程结构动力学国家重点实验室,重庆400067 [2]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《公路交通技术》2020年第6期60-66,共7页Technology of Highway and Transport

基　　金：国家重点研发计划项目(2017YFC0806009)。

摘　　要：为研究高低塔悬索桥在纵向地震作用下的结构响应特点以及阻尼器减震性能,依托云南龙江特大桥制作了1∶60的有机玻璃试验模型,在塔梁连接处设置磁流变阻尼器模拟原桥的粘滞阻尼器,完成了全桥振动台试验,测试了索塔关键截面应变,以及塔顶位移和塔梁相对位移。试验结果表明:纵向地震作用下,塔梁连接处增设阻尼器后,塔梁相对位移明显减小,高塔塔顶位移增大,低塔塔顶位移减小,索塔塔底弯矩变化较小。In order to study the structural response characteristics and damping performance of damper for high-and low-tower suspension bridge under longitudinal earthquake,a plexiglass test model at 1:60 was made according to the Yunnan Longjiang Bridge.A MR damper is installed at the tower-girder connection to simulate the viscous damper of the original bridge,the shaking table test of the whole bridge is completed,and the strain of the key section of the tower,the displacement at the top of the tower and the relative displacement of the tower girder are measured.The test results show that under the longitudinal earthquake action,the relative displacement responses between the deck and the pylons is obviously reduced by viscous dampers,the displacement of the top of the high tower increases,the displacement of the top of the low tower decreases,and the bending moment has little change at the bottom of tower.

关 键 词：高低塔 悬索桥 减隔震 磁流变阻尼器 振动台试验 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]