高速铁路高低塔斜拉桥减隔震装置研究  

Research on Seismic Isolation Device of High⁃Low Towers Cable⁃stayed Bridge for High Speed Railway

作　　者：刘信斌[1] LIU Xinbin(China Railway Shanghai Design Institute Group Co.Ltd.,Shanghai 200070,China)

机构地区：[1]中铁上海设计院集团有限公司,上海200070

出　　处：《铁道建筑》2024年第2期75-80,共6页Railway Engineering

摘　　要：通过分析各类减隔震装置对高速铁路高低塔混合梁斜拉桥的减隔震作用,从而选取合理减隔震装置。以阜淮(阜阳—淮北)新建高速铁路跨颍河主跨230 m的高低塔混合梁斜拉桥为研究对象,建立铅芯橡胶支座、摩擦摆式减隔震支座、黏滞阻尼器有限元模型,采用非线性时程分析法对塔底弯矩、梁端水平位移等目标函数进行地震响应分析。结果表明:采用铅芯橡胶支座,塔底弯矩降幅达到49.9%;采用摩擦摆减隔震支座,塔底弯矩降幅达到54.3%;采用黏滞阻尼器,塔底弯矩降幅达到62.0%。对于高速铁路高低塔混合梁斜拉桥而言,黏滞阻尼器减隔震装置更合理,并给出合适设计参数。By analyzing the seismic reduction and isolation effects of various types of seismic isolation devices on high speed railway mixed beam cable-stayed bridges,a reasonable seismic isolation device was selected.Taking the newly built high speed railway mixed beam cable-stayed bridge with a main span of 230 m across the Yinghe River in Fuhuai(Fuyang-Huaibei)as the research object,a finite element model of lead rubber bearings,friction pendulum seismic isolation bearings,and viscous dampers was established.Nonlinear time history analysis method was used to analyze the seismic response of target functions such as tower bottom bending moment and beam end displacement.The results show that using lead core rubber bearings can reduce the bending moment at the bottom of the tower by 49.9%.By using friction pendulum seismic isolation bearings,the bending moment at the bottom of the tower can be reduced by 54.3%.By using viscous dampers,the bending moment at the bottom of the tower was reduced by 62.0%.For high speed railway mixed beam cable-stayed bridges with high-low towers,the viscous damper isolation device is more reasonable and appropriate design parameters are provided.

关 键 词：高低塔混合梁斜拉桥 数值计算 铅芯橡胶支座 摩擦摆式减隔震支座 黏滞阻尼器 

分 类 号：U448.13[建筑科学—桥梁与隧道工程]