塔梁连接方式对三塔悬索桥地震响应的影响  

Effects of Pylon-girder Connection on Seismic Response of Three-pylon Suspension Bridge

作　　者：巫生平[1,2] WU Shengping(College of Engineering,Fujian Jiangxia University,Fuzhou,Fujian 350108,China;College of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350108,China)

机构地区：[1]福建江夏学院工程学院,福建福州350108 [2]福州大学土木工程学院,福建福州350108

出　　处：《水利与建筑工程学报》2024年第6期61-67,共7页Journal of Water Resources and Architectural Engineering

基　　金：福建省自然科学基金项目(2022J01970);福建省中青年教师教育科研项目(JAT200371);福建江夏学院青年科研人才培养项目(JXZ2020010)。

摘　　要：为优化三塔四跨悬索桥的减震体系设计方案,以某实际工程为例,利用SAP2000软件建立数值模型,对比分析不同中塔-主梁连接方式结构的抗震性能,并在确定合理连接方式基础上,进一步优化分析粘滞阻尼器的设计参数。研究结果表明:通过增加纵向约束刚度能有效减小主塔内力和变形,降低主跨挠度。为减小桥梁运营期间主梁的振动幅度,中塔-主梁连接方式宜优先选用固定支座。在主梁与边塔下横梁处设置粘滞阻尼器可进一步减小主塔下横梁下部结构的地震响应,且建议阻尼器的阻尼系数选用3500,速度指数选用0.3。In order to optimize the design of the seismic absorption system of a three-pylon and four-span suspension bridge,taking an actual project as an example,a numerical model was established using SAP2000 software,and the seismic performance of structures with different middle tower-main beam connection methods was comparatively analyzed,and based on the reasonable connection method,the design parameters of the viscous damper are further optimized.The research results show that by increasing the longitudinal restraint stiffness,the internal force and deformation of the main tower can be effectively reduced,and the main span deflection can be reduced.In order to reduce the vibration amplitude of the main beam during the operation of the bridge,fixed bearings should be preferred for the connection between the middle tower and the main beam.Installing viscous dampers at the main beam and the lower beam of the side tower can further reduce the seismic response of the substructure of the lower beam of the main tower.It is recommended that the damping coefficient of the damper be 3500 and the velocity index be 0.3.

关 键 词：三塔悬索桥 减震 塔梁连接 粘滞阻尼器 地震响应 

分 类 号：U448.25[建筑科学—桥梁与隧道工程] U442.5[交通运输工程—道路与铁道工程]