减隔震混合装置在独塔斜拉桥抗震设计中的应用  

Application of Hybrid Seismic Mitigation and Isolation Device to Seismic Design of Single-Pylon Cable-Stayed Bridge

作　　者：燕斌[1,2] 杜修力[1] 韩强[1] 贾俊峰[1] 

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]北京国道通公路设计研究院股份有限公司,北京100053

出　　处：《桥梁建设》2014年第6期101-106,共6页Bridge Construction

基　　金：国家重点基础研究发展计划(973计划)项目(2011CB013600);国家自然科学基金项目(51208015);中国博士后科学基金资助项目(2013T60047)~~

摘　　要：为验证减隔震混合装置(2种或多种减隔震装置的组合)对独塔斜拉桥的减隔震效果,以徐尹路潮白河大桥主桥为背景进行研究。将铅芯橡胶支座与液体粘滞阻尼器共同应用于该桥过渡墩的横桥向抗震设计,采用MIDAS Civil 2012分析减隔震混合装置对独塔斜拉桥抗震性能的影响,并通过对液体粘滞阻尼器进行参数分析,得到适用于该桥的减隔震装置参数。结果表明:减隔震混合装置可以用于解决独塔斜拉桥的横桥向抗震问题。相对于常规设计,减隔震混合装置可以避免盆式支座在横桥向发生剪切破坏,也可以有效降低过渡墩的受力;相对于单独采用铅芯橡胶支座的抗震设计,减隔震混合装置可以改善横桥向位移响应及桥塔的受力,但会略微增大过渡墩的受力。To verify the effect of the hybrid seismic mitigation and isolation device （the com- bination of two or more than two kinds of the seismic mitigation and isolation devices） applied to the single-pylon cable-stayed bridge, the main bridge of the Xuyin Road Chaobai River Bridge was taken as an object for study. Both the lead-rubber bearing and the fluid viscous damper were ap- plied to the transverse seismic design of the transition pier of the bridge, the effect of the hybrid seismic mitigation and isolation device of the bearing and damper on the seismic performance of the bridge was analyzed by the MIDAS Civil 2012 and by parametric analysis of the damper, the parameters of the device that were suitable for the bridge were obtained. The results of the analy- sis indicate that the device can resolve the transverse seismic problem of the bridge. In compari- son to the common design, the device can avoid the shear failure of the pot bearing in the trans- verse direction of the bridge and can effectively decrease the force in the transition pier and in eomoarison to the seismic desien of usine the lead-rubber bearing alone, the device can improve the transverse displacement response and the force of the pylon, but will increase the force in the transition pier to a slight extent.

关 键 词：独塔斜拉桥 过渡墩 抗震性能 减隔震混合装置 铅芯橡胶支座 液体粘滞阻尼器 

分 类 号：U442.55[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]