坝后背管与拱坝共同工作的有限元分析

本文给出用以分析拱坝及其背管共同工作的计算模型.在背管与坝体之间布置夹层单元以模拟施工的薄弱面,并根据施工程序分级加载,对结构进行非线性分析.它可以分析背管对坝体应力分布的影响,还能给出背管与坝体之间接缝处和背管本身的应力状态.通过对李家峡工程的计算,分析了这种结构的工作情况,并得出一些有意义的结论.

Finite Element Analysis of an Arch Dam with Its Back Tubes Sharing in Resistance Against the Load

In this paper, a mathematical model is introduced for the solution of an arch dam with its back tubes sharing in the resistance against the load In order to simulate the weak faces in construction, joint elements are used between the arch dam and its back tubes. The structure is loaded sequentially according to construction procedure and studied by a nonlinear method. The model can not only be used to study the influence of the back tubes on the dam stress, but also to analyze the stress condition of the tubes and the joints between the dam and tubes. In order to show the working condition of this kind of structure, Lijiaxia project is analyzed. Some instructive results are obtained in the analysis.