鄂东长江公路大桥活载非线性效应与试验分析  

Testing and Analysis of Live Load Nonlinear Effect of Edong Changjiang River Highway Bridge

作　　者：李鸥[1,2] 彭旭民[1,2] 

机构地区：[1]中铁大桥局集团桥科院有限公司,湖北武汉430034 [2]桥梁结构安全与健康湖北省重点实验室,湖北武汉430034

出　　处：《桥梁建设》2011年第5期31-35,共5页Bridge Construction

摘　　要：为了分析几何非线性对大跨度斜拉桥的活载效应的影响程度,以鄂东长江公路大桥(主跨926m的双塔双索面混合梁斜拉桥)为背景,利用MIDAS Civil软件建立全桥有限元模型,分别计算该桥在活载作用下考虑非线性效应与不考虑非线性效应的结构内力及位移,并与全桥荷载试验实测结果做对比分析。结果表明:对于鄂东长江公路大桥这样超大跨度的斜拉桥,活载的非线性计算结果更加符合大跨度斜拉桥的实际响应,线性计算结果误差较大,且偏于不安全。To analyze the degree of geometric nonlinearity influence on the live load effect of long span cable-stayed bridges,the Edong Changjiang River Highway Bridge（a hybrid girder cable-stayed bridge with double pylons,double cable planes and with a main span 926 m） was cited as an example,the software MIDAS Civil was used to establish the finite element model for the whole bridge and the structural internal forces and displacement of the bridge under the action of the live load that took and did not take account of nonlinear effect were respectively calculated and were analyzed and compared with the measurements of the load testing of the bridge.The results of the calculation and analysis demonstrate that for a long span cable-stayed bridge like the Edong Changjiang River Highway Bridge,the calculations of the nonlinearity of the live load are more coincident with the actual structural response while the errors of the calculations of the linearity are great and tend to be unsafe.

关 键 词：斜拉桥 大跨度 活载 几何非线性 静载试验 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]