小河面板堆石坝应力与变形分析

Stress and deformation analysis of concrete face rockfill dam of Xiaohe River

采用邓肯模型对小河面板堆石坝竣工期和蓄水期进行了三维有限元计算,接触面用弹粘塑性本构关系的节理单元进行模拟,分析了不同时期坝体及面板的应力变形情况.计算结果表明,坝体最大横断面的最大沉降值约为坝高的0.54%,面板周边缝位移的绝对值都小于8 mm,大坝应力变形满足安全要求.

Three-dimensional finite element analysis and Duncan model are adopted to calculate and simulate the stress and deformation of the concrete face roekfill dam of Xiaohe River during its completion and impounding period. The joint element of 3D elasto viseoplastieity constitutive model is used to simulate the contact surface. Through analyzing stresses and deformations of the dam and the concrete face, it is shown that the maximum settlement of the maximum cross-section was found a value corresponding to 0.54 ~ of the dam height; the displacements of peripheral slab joints are small, which are less than 8 mm during reservoir impounding; the stresses and deformations of the dam can meet the requirement of safety.