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.
出处
《铁道学报》
EI
CSCD
北大核心
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)
关键词
薄壁箱梁
剪力滞效应
翘曲位移函数
有限元法
thin walled box girder
shear lag effect, warping displacement function, finite element method
