矩形隧道中变截面杆件的内力分析  

Inner Force Analysis for Bars with Variable Cross-Section of Rectangular Tunnel

作　　者：陆浩亮[1] 陆震宇[1] 唐胡乐[1] 

机构地区：[1]同济大学,上海200092

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

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.

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 

分 类 号：U451[建筑科学—桥梁与隧道工程]