设有限位墩的典型长联梁桥抗震性能分析  

Seismic Analysis on Typical Long Bridges with Restrainer Piers

作　　者：王旭[1,2] 魏延建[1] 孙得璋 刘浪[1] 刘怀林[2] WANG Xu;WEI Yanjian;SUN Dezhang;LIU Lang;LIU Huailin(State Key Laboratory Breeding Base of Mountain Bridge and Tunnel Engineering,Chongqing Jiaotong University, Chongqing 400074,P.R.China;China Merchants Chongqing Communications Research ＆ Design Institute Co.Ltd., Chongqing 400074,P.R.China;Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics,China Earthquake Administration, Harbin 150080, Heilongjiang,P.R.China)

机构地区：[1]重庆交通大学山区桥梁与隧道工程国家重点实验室培育基地,重庆400074 [2]招商局重庆交通科研设计院有限公司,重庆400074 [3]中国地震局工程力学研究所地震工程与工程振动重点实验室,黑龙江哈尔滨150080

出　　处：《重庆交通大学学报（自然科学版）》2017年第10期1-7,共7页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：交通运输部建设科技项目(2013318800020);中央高校基本科研业务费资助项目(310821161120);重庆市教委科学技术研究项目(KJ1400333);山区桥梁与隧道工程国家重点实验室培育基地(重庆交通大学)开放基金资助项目(CQSLBF-Y15-5)

摘　　要：我国现存大量梁式桥,而梁桥在近几次大地震中均出落梁现象,对梁的有效控制是桥梁抗震的关键问题之一。从国内外震害来看,限位墩是解决梁桥落梁现象的有效手段。以设有限位墩的典型长梁为研究对象,运用有限元分析手段,通过分别考虑主梁碰撞、联数不同、联长不同等因素来分析桥梁的动力响应。结果表明:碰撞对桥梁结构的动力响应影响很大,设计如果不考虑碰撞作用,可能引起结构的不安全。联数和联长的增加也使最大墩梁相对位移有所增加,但当联数增加到6联以上时,最大相对位移基本不变,此时限位墩限制位移作用达到极限状态。There are many beam bridges in China.However,this kind of bridges often has the phenomenon of unseating of bridge girders in recent earthquakes. Therefore,the effective control of beam is a key problem of anti-seismic bridge design.According to the seismic damages at home and abroad,restrainer pier is an effective measure to solve the above problem.Taking typical long bridges with restrainer piers as the research object,the dynamic response of the bridge was analyzed by means of finite element analysis,taking the below factors into consideration,such as main beam ponding,different joint number and different joint length. The results show that girder pounding has a great impact on dynamic response of bridge structure. Therefore,the design without considering the girder ponding may result in structure insecurity.The increase of joint number and length also increases the maximum relative displacement of pier and girder.But the maximum relative displacement remains almost unchanged when the joint number increases above six joints,for the restrainer pier reaches the limit state of displacement restrain.

关 键 词：桥梁工程 长桥 碰撞 联数 落梁震害 限位墩 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]