采用复合隔震体系的泖港大桥抗震性能研究  

Study on Seismic Performance of Maogang Bridge Using Composite Isolation System

作　　者：王瑞龙 

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海市200092

出　　处：《城市道桥与防洪》2018年第2期158-161,共4页Urban Roads Bridges & Flood Control

摘　　要：基于上海泖港大桥,采用非线性时程分析方法,对其采用的球钢支座并联叠层橡胶支座的复合隔震体系进行了抗震性能分析。结果表明:边墩处与主墩处叠层橡胶支座刚度比为1∶3,同时,支座刚度分别为16 000 k N/m与48 000 k N/m时,结构响应最为合理,全桥抗震性能满足要求。该桥采用的复合隔震体系利用了球钢支座的摩擦耗能性能和叠层橡胶支座的水平剪切性能,具有受力明确、构造简单、经济可行、减震效果好的特点,具有较大推广应用价值。The nonlinear time-history method is used to analyze the seismic performance of Maogang Bridge in Shanghai using the composite isolation system of steel spherical bearings and laminated rubber bearings.The result shows that the stiffness ratio of laminated rubber bearings at the side pier and main pier is 1:3.And also when the stiffness of bearings is 16 000 k N/m and 48 000 k N/m respectively,the structural response is mostly reasonable and the seismic performance of the whole bridge meets the requirements.The composite isolation system of this bridge uses the friction dissipation performance of steel spherical bearings and the horizontal shearing performance of laminated rubber bearings,has the characteristics of definite stress,simple structure,feasible economy and good damping effect,and has the greater values of popularization and application.

关 键 词：叠层橡胶支座 复合隔震 时程分析 参数分析 抗震性能 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]