双柱式轻型桥墩既有线路桥梁加固方案动力分析  

Dynamic analysis on reinforcement schemes of the prevailing railway bridge fabricated twin pole lighter pier

作　　者：陈令坤[1] 曾志平[1] 蒋丽忠[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《西安建筑科技大学学报（自然科学版）》2010年第2期211-215,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：铁道部重大课题(2008G031-17);国家自然科学基金资助项目(50908236);湖南省自然科学基金资助项目(09JJ4022)

摘　　要：某既有单线铁路桥为拼装式双柱墩连续简支T梁桥,梁跨中及墩顶横向振幅大大超出《铁路桥梁检定规范》行车安全限值.采用列车桥梁时变系统振动分析理论,建立列车-桥梁系统动力分析模型,对提出的桥墩横向刚度加固方案进行动力分析,计算了加固前后不同车速不同跨度条件下车辆与桥梁的动力响应,并对加固后的列车走行安全进行了计算分析.A single-line railway bridge consisting essentially fabricated double piers and continuous simple-supported T-type beam bridge is studied, and the lateral amplitude of vibration of beam mid-span and the tops of the piers exceeds the safety limit of the Code for Rating Existing Railway Bridges. Dynamic analysis on lateral rigidity reinforcement schemes is presented, setting up the dynamic analysis model of train bridge system, the theory of train-bridge （or track） time-varying system is used to calculate dynamic response of train and bridge on different span and at different speed between un-reinforcement and reinforcement. The factor influencing the safety of running of railway vehicles after strengthening is calculated and analyzed.

关 键 词：双柱式轻型桥墩 铁路桥梁 横向刚度加固 动力分析 

分 类 号：U213.2[交通运输工程—道路与铁道工程]