变截面薄壁箱梁剪力滞剪切变形效应分析  

Non-uniform thin wall box analysis of considering both shear lag and shear deformation

作　　者：刘世忠[1] 欧阳永金[2] 吴亚平 夏旻[3] 

机构地区：[1]兰州铁道学院工程结构研究所,甘肃兰州730070 [2]厦门市政建设指挥部,福建厦门361012 [3]同济大学桥梁工程系,上海200092

出　　处：《中国公路学报》2002年第3期61-63,67,共4页China Journal of Highway and Transport

基　　金：甘肃省中青年基金项目 (ZR970 0 7

摘　　要：与文献 [1 ]～ [5 ]求解薄壁箱梁剪力滞问题不同 ,以 REISSNER E[6]提出的能量变分为出发点 ,在综合考虑剪力滞剪切变形效应的基础上 ,利用最小势能原理建立了薄壁箱梁的控制微分方程 ,在获得方程解析解后 ,导出了可广泛应用于变截面梁、连续梁剪力滞剪切变形效应分析的有限元列式。算例表明 ,该计算方法简捷 ,计算结果精度高 ,便于实际应用 ,具有很高的工程使用价值。Differing from the method of considering shear lag as literature～,in this paper based on energy variation principle put forward by REISSNER E,the differential equations considering both shear lag and shear deformation were established by using the minimum potential principle.The finite element matrixes were derived after the analytical solution of equations was obtained.The numerical calculation results are compared with those from the model test,which shows the convenience and accuracy of the method given in this paper.This method makes shear lag numerical analysis variable section thin wall beams and others as easy as that of common ones.It can be very widely used in civil engineering.

关 键 词：剪力滞 剪切变形效应 变截面 薄壁箱梁 有限元 最小势能原理 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]