波形钢腹板连续箱梁剪滞效应引起的附加轴力分析  

Additional Axial Force Analysis Caused by Shear lag Effect of Cintinuous Box-girder Bridge with Corrugated Steel Webs

作　　者：吴焕庆[1] 张俊波 刘世忠[1] 冀伟[1] 满自亭[1] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]中交三航厦门分公司,福建厦门361006

出　　处：《兰州交通大学学报》2013年第3期21-25,共5页Journal of Lanzhou Jiaotong University

基　　金：国家自然科学基金项目(50968008)

摘　　要：基于平截面假定并不计波形钢腹板惯性矩,建立了波形钢腹板两跨连续箱梁在三次抛物线剪滞翘曲位移函数下的附加轴力计算式.引入附加轴向应力比系数,分析了波形钢腹板混凝土两跨连续梁在均布荷载及跨中集中荷载作用下,附加轴向应力对结构受力性能的影响,分析表明:在两种荷载工况下,附加轴向应力比系数均小于1%,可以忽略其效应.Under the condition of the plane section assumption and without considering the inertia moment o[ corrugated steel webs, this paper establishes the additional axial force formula [or the two spans continu- ous box-girder bridge with corrugated steel webs based on a cubic parabola shear lag warping function. At the same time, it leads into the additional axial force stress ratio coefficient. Then it analyses the impact of additional axial stress to the influence degree of structural mechanical, which is based on the continuous box-girder bridge with corrugated steel webs under the full cross-uniformly distributed load and mid-span concentrated load. It shows that the value of additional axial stress can be ignored because the additional axial force stress ratio coefficient under the full cross-uniformly distributed load and the mid-span concen- trated load is less than 1%.

关 键 词：波形钢腹板 连续梁 剪滞效应 附加轴力 均布荷载 集中荷载 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]