三维接触元理论及其在水利工程中的应用

The Application of Three Dimensional Joint Element in Water Conservancy Projects

本文的目的是研究南水北调倒虹吸结构与地基之间的相互作用。由于结构的材料与周围土层的性质相差较大，有可能在其接触面上产生错动滑移或开裂。为了充分反映接触面上的受力特性，应采用特殊的接触面单元，因此，本文采用三维接触元模型探讨倒虹吸结构与地基相互作用的问题，并采用结构化程序设计方法，编制了三维接触元计算软件，较好地解决了倒虹吸的相互作用问题，为倒虹吸结构的安全设计提供充分的理论依据。

This Paper aims at studing the interaction between the inverted-siphon of the Diverting Water From South To North and the foundation. The material character of the inverted-siphon is very different from that of the foundation. Therefore, on certain condition slide or split will happen on the contact face. To reflect the character of contact face, a special joint element should be adopted. In this paper, a three dimensional joint ele- ment model is used to probe into the interaction. and the structured programming technique is adopted to pro- gram the calculating software of three dimensional joint, which well solved the interaction problem of the struc- ture and foundation, and supplies the sufficient theory base for the safety design of the inverted-siphons.