薄壁箱梁剪力滞分析的多参数翘曲位移函数及其有限元法  

Warping displacement function and finite element method for calculation of shear lag effect in box girder

作　　者：韦成龙[1] 曾庆元[1] 刘小燕[2] 

机构地区：[1]长沙铁道学院土木建筑学院,湖南长沙410075 [2]长沙交通学院,湖南长沙410007

出　　处：《铁道学报》2000年第5期60-64,共5页Journal of the China Railway Society

基　　金：湖南省自然科学基金资助项目! ( 97JJY2 0 63)

摘　　要：在分析箱梁剪力滞效应时 ,用多个不同的纵向位移剪力滞差值函数自动计入翼板宽度及其至截面形心距离的影响 ,并且考虑轴力平衡条件 ,构造薄壁箱梁 (可蜕变为开口截面梁 )的翘曲位移函数 ,导出了控制微分方程、边界条件及相应的一维有限元列式。数值计算比较和模型实验验证表明 。In the paper , the influences on the axial stress distribution due to variation of the width of the flanges and their distances to the neutral axis are considered to form a warping displacement function for box girder. The differential equations, boundary conditions and the corresponding formulae of one dimensional finite element are derived from the theory of minimum potential energy. Compared the calculation results with the results obtained from model test and other methods, the method proposed in this paper is proved to be both simple and valid.

关 键 词：薄壁箱梁 剪力滞效应 翘曲位移函数 有限元法 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]