砂土地基水闸三维弹塑性静力有限元研究

3D elasto-plastic finite element analysis of sluice seated on sand foundation

论述了用弹塑性有限元法求解砂土地基水闸结构整体稳定性的基本原理.针对新疆某渠首工程泄洪闸有底坎折线型闸底板的特殊形式,将闸室整体结构及其与之耦连的地基作为一个结构体系进行数值模拟.通过对比分析该泄洪闸在弹塑性有限元法与线弹性方法下闸底板的位移与应力分布情况,进一步论证用理想弹塑性有限元进行水闸结构分析的可行性.

Discussed the basic principle of elastic - plastic finite element method for solving the overall stability of the sluice structure located on sand foundation. According to one of Xinjiang headworks sluice with special form of polyline bottom, coupled the structure with the foundation as a system and then made a numerical simulation. Through comparative analysis of the displacement and stress distri- bution of the whole structure calculated by elastic- plastic and linear elastic finite element method, the feasibility of structure analysis method of elastic - plastic finite element was further demonstrated.