轻轨特大刚构拱桥承载能力及车桥耦合振动试验研究  

Experimental Study on Load-capacity and Vehicle-bridge Coupling Vibration for an Extra Long-span Rigid Frame Arch Bridge in Light-rail

作　　者：钟晓林 张鹏 Zhong Xiaolin;Zhang Peng(Guangzhou Testing Centre of Construction Quality&Safety Co.,Ltd.Guangzhou 510440,China)

机构地区：[1]广州建设工程质量安全检测中心有限公司

出　　处：《广东土木与建筑》2020年第2期28-32,共5页Guangdong Architecture Civil Engineering

基　　金：广州市科技计划项目（201508020045）

摘　　要：为评估某主跨为310 m的城市轻轨高架桥的承载能力及刚度,进行静载、模态和车桥耦合振动试验。结果表明,在设计荷载作用下,桥梁整体处于弹性状态,桥梁受载恢复性能也较好;竖向刚度、主梁及边墩横向刚度满足设计使用要求。正常行车时,桥梁上部结构响应与列车运营速度正相关;在现行最大运营荷载下,列车制动及会车状态下不会产生桥梁水平向的最不利状态。In order to evaluate the bearing capacity and stiffness of a city light-rail bridge with a 310m span,static load,modal and axlecoupled vibration tests were carried out.The results show that under the design load,the whole bridge is in an elastic state,and the bridge has good recovery performance.The vertical stiffness,the lateral stiffness of the main beam and the side piers meet the design requirements.The bridge superstructure response is positively correlated with the train operating speed under design traffic condition.The worst state of the bridge in horizontal direction will not occur under the current maximum traffic load,when train braking and meeting.

关 键 词：轻轨 拱桥 承载能力 车桥耦合 有限元 模态试验 

分 类 号：U260.143[机械工程—车辆工程]