摘要
针对单箱三室箱形截面,假定内室和外室的顶板、底板具有不同的剪滞纵向位移差函数以及考虑薄壁箱梁不同宽度翼板的剪滞变化幅度,应用能量变分原理,推导出箱梁受横向荷载作用下的剪滞控制微分方程和边界条件,并得到解析解;最后通过有限单元法验证其理论分析的正确性。
The shear lag effect in the girder of single box with three cells is analyzed in this paper. Assuming that the top and bottom slabs of the inner and outer cells have different longitudinal displacement differential functions, the governing differential equations and boundary conditions of the box girder under lateral loading are derived by energy-variation principle. The closed-form solutions of the equations are obtained. Then an example is analyzed by above method and the finite element method. The results of two methods reach good agreement,which verifies the solution given in this paper.
出处
《公路》
北大核心
2009年第10期60-64,共5页
Highway
基金
国家自然科学基金项目
项目编号50608005
关键词
单箱三室
薄壁箱梁
剪滞效应
能量变分原理
single box with three cells
thin walled box girder
shear lag effect
energy-variation principle
