摘要
本文推导了变截面杆的单元刚度矩阵和荷载结点化的计算公式 ,可用于编制变截面框架结构的电算程序。并通过隧道衬砌结构算例 ,比较了按实际变截面计算和简化等截面直杆计算两种方法的差异 ,说明隧道结构按变截面实际情况计算的必要性。
In this paper, the element stiffness matrix for the bar with variable cross-section and the equation to calculate the node loads are deduced, which are used in the developing of computer softwere for the analysis of the frame with variable cross-section bars. The differences of calculation results with two different kind of models, the variable cross-section bar model and the equivalent uniform cross-section bar model, are compared through the calculation example for a turnnel lining structure, and it is concluded that the variable cross-section bar model is better in the analysis of tunnel structures.
出处
《结构工程师》
2002年第2期32-35,共4页
Structural Engineers
基金
上海市重点学科建设项目资助
关键词
矩形隧道
变截面杆件
内力
单元刚度矩阵
衬砌结构
矩阵位移法
haunch, variable cross-section bar, element stiffness matrix, tunnnel lining structure, matrix structural analysis
