刚构连续梁体系铁路矮塔斜拉桥的减震研究  

Research on Damping of Seismic Responses of Extradosed Cable-stayed Railway Bridge with the Rigid Continuous Beam System

作　　者：张永亮[1] 陈兴冲[1] 郭永强[2] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]兰州大学土木学院与力学学院,甘肃兰州730000

出　　处：《铁道学报》2011年第10期79-85,共7页Journal of the China Railway Society

基　　金：国家自然科学基金项目(10902045);铁道部科技研究开发计划项目(2008G031-K)

摘　　要：以新型刚构连续梁体系铁路矮塔斜拉桥为实际工程背景,研究黏滞液体阻尼器对结构纵向抗震性能的影响。采用非线性时程反应分析方法,从结构的减震效果及便于阻尼器的局部连接构造设计角度出发,对非线性黏滞液体阻尼器的阻尼系数和阻尼指数进行参数敏感性分析,并探讨地震动加速度峰值及频谱特性对减震效果的影响。结果表明:合理选择黏滞阻尼器的力学参数,刚构连续梁体系铁路矮塔斜拉桥具有显著的减震效果,但减震效果受地震动的频谱特性影响较为敏感。Research on Longitudinal anti-seismic performance of the extradosed cable-stayed railway bridge with the rigid continuous beam system was conducted under the action of instulled viscous liquid dampers.Sensitivity analysis on the damping coefficient and damping exponent of the viscous liquid damper was made with the non-linear time history response analysis method and from the point of improving structural seismic responses and facilitating design of local connection of the dampers,and the influnce of peak acceleration and spectrum characteristics of earthquake vibration on damping of seismic responses was studied.The results show that if mechanical parameters of the viscous liquid damper is reasonably selected,significant damping of seismic responses can be obtained for extradosed cable-stayed railway bridges with the rigid continuous beam systems,however damping of seismic responses is sensitive to spectrum characteristics of earthquake vibrations.

关 键 词：刚构连续梁 矮塔斜拉桥 黏滞阻尼器 减震效果 频谱特性 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]