连续梁桥钢阻尼滑板支座设计参数优化方法  

Design Parameter Optimization Method for Steel Damping Sliding Bearing in Continuous Girder Bridge

作　　者：夏樟华[1] 林友勤[1] 孔令俊[2] 刘洋[1] XIA Zhanghua;LIN Youqin;KONG Lingjun;LIU Yang(College of Civil Engineering,Fuzhou University Fuzhou,350108,China;Zhuzhou Times New Material Technology Co.,Ltd.Zhuzhou,410007,China)

机构地区：[1]福州大学土木工程学院,福州350108 [2]株洲时代新材料科技股份有限公司,株洲410007

出　　处：《振动．测试与诊断》2022年第4期741-748,827,共9页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(51408360);福建省自然科学基金资助项目(2020J01477);厦门市建设局科技资助项目(XJK2021⁃1⁃19)。

摘　　要：钢阻尼复合滑板支座具有滑动耗能、自复位且经济性好的优点,但对其实际隔震性能还缺乏实桥试验验证,不同设计参数对其隔震率的影响规律也缺乏认识。针对这些问题,以一座两跨连续梁桥为研究对象,进行1∶5缩尺比模型的振动台试验,分析了墩顶位移、墩底剪力和桥面位移的减震率,比较了不同强度地震作用下高阻尼橡胶支座和钢阻尼滑板支座的隔震效果。结合有限元模型,分析了不同类型地震作用下屈服力、初始刚度、屈服刚度比对墩顶位移、墩底剪力和桥面位移减震率的影响规律,并分析了参数取值范围。结果表明,钢阻尼滑板支座的隔震效率在纵桥向略优于高阻尼橡胶支座,横桥向则接近高阻尼橡胶支座。综合考虑桥面板位移、墩顶位移和墩顶剪力的减震率,可以确定出钢阻尼滑板支座的有效取值范围,对实桥的支座设计有借鉴作用。The steel damping composite sliding(SDS)bearing has the advantages of sliding energy consump⁃tion,self-reset and good economy.However,the isolation performance of the bearing is still lack of experimen⁃tal verification of the real bridge,and the influence of different design parameters on its isolation rate is also lack of deep research.To solve these problems,a two span continuous girder bridge was taken as the research ob⁃ject,and the shaking table test of 1∶5 scaled model was carried out.The isolation effect of the high damping rub⁃ber(HDR)bearing and the SDS bearing under different intensity earthquake is compared by using the isolation rates of displacement at the top of the pier,shear force in the bottom and bridge deck displacement.The finite el⁃ement model is also conducted to study effects of yield force,initial stiffness,yield stiffness ratio,damping ratio on the displacement at the top of the pier,shear force in the bottom and bridge deck displacement.Under differ⁃ent types of earthquake,the available parameter range is analyzed.Results show that the isolation rate of the SDS bearing was slightly better than that of the HDR bearing in the longitudinal bridge direction,and close to that of the HDR bearing in the transverse bridge direction,which indicates parameter optimization method is available for the SDS bearing.

关 键 词：桥梁工程 振动台试验 滑板支座 位移 剪力 减震率 

分 类 号：U442.5[建筑科学—桥梁与隧道工程] TH122[交通运输工程—道路与铁道工程]