矮塔斜拉桥的减震方案对比研究  

Research on seismic response reduction of a cable-stayed bridge with low towers

作　　者：陈兴冲[1] 张永亮[1] 李子奇[1] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《世界地震工程》2010年第3期16-21,共6页World Earthquake Engineering

基　　金：铁道部科技研究开发计划项目(2006G014)

摘　　要：针对位于高烈度地震区的刚构连续梁体系矮塔斜拉桥的受力特点,提出了分别采用粘滞液体阻尼器、Lock-up装置及摩擦型滑动支座3种减隔震方案,并采用非线性时程反应分析方法分析了3种方案的减震效果。结果表明:3种减隔震装置对矮塔斜拉桥均有明显的减震效果,粘滞阻尼器及Lock-up装置减震效果较好,滑动摩擦支座的减震效果次之。但从结构的正常使用及结构体系的地震响应分布规律来看,粘滞液体阻尼器的减震方案最优。Based on mechanical properties of a cable-stayed bridge with low towers and the rigid continuous beam system in the high-intensity earthquake zone,three kinds of schemes on seismic response reduction including viscous dampers,Lock-up device and friction sliding bearings are presented for the cable-stayed bridge,and effectiveness of seismic response reduction is analyzed by using non-linear time history response analysis.The results show that the three types of isolation devices are significantly effective for the cable-stayed bridge.The seismic response reduction of the viscous damper and the Lock-up device is better,that of friction sliding bearing is second.But the viscous damper is optimal for considering normal use of the structure and the distribution rule of its seismic response.

关 键 词：矮塔斜拉桥 粘滞阻尼器 LOCK-UP装置 滑动摩擦支座 减震效果 

分 类 号：U442[建筑科学—桥梁与隧道工程] P315.952.2[交通运输工程—道路与铁道工程]