大跨度双层钢桁梁悬索桥的车桥耦合振动研究  

Vehicle-bridge Coupling Vibration of Long-span Double-deck Steel Truss Suspension Bridge

作　　者：倪章军 NI Zhang-jun(Guangzhou Urban Reconstruction co.LTD,Guangzhou 510030,China)

机构地区：[1]广州市城市复建有限公司

出　　处：《黑龙江交通科技》2019年第11期133-135,共3页Communications Science and Technology Heilongjiang

摘　　要：将车道荷载效应乘以冲击系数,可以得到桥梁设计中车辆的活载效应。因此,可以反推车道荷载,得到确定的交通车流分布,以此来计算桥梁的响应和冲击系数,以检验规范所获得的冲击系数是否合适。结果表明,桥梁位移响应主要与车辆行驶速度有关,与路面不平整度无明显关系;桥梁的内力响应与路面不平整度有关;路面粗糙度对主梁垂直位移、梁端挠度和塔顶垂直位移影响不大。The live load effect of vehicles in bridge design can be obtained by multiplying the lane load effect by the impact coefficient.Therefore,the lane load can be reversely deduced to obtain the determined traffic flow distribution,so as to calculate the response and impact coefficient of the bridge and test whether the impact coefficient obtained by the code is appropriate.The results show that the bridge displacement response is mainly related to the vehicle speed,and has no obvious relationship with the road roughness.The internal force response of bridge is related to the roughness of road surface.The surface roughness has little effect on the vertical displacement of the girder,the deflection of the beam end and the vertical displacement of the tower top.

关 键 词：冲击系数 确定性车流 位移响应 内力响应 路面不平整度 

分 类 号：U442[建筑科学—桥梁与隧道工程]