胶凝砂砾石坝体应力及位移非线性有限元分析  

Nonlinear Finite Element Analysis of Stress and Displacement of CSG Dam

作　　者：杨世锋[1,2] 柴启辉[1,2] 孙明权[1,2] 

机构地区：[1]华北水利水电大学,河南郑州450045 [2]水资源高效利用与保障工程河南省协同创新中心,河南郑州450045

出　　处：《人民黄河》2016年第9期88-91,共4页Yellow River

基　　金：水利部公益性行业科研专项(201301025)

摘　　要：为校核胶凝砂砾石坝的应力及变形状况,研究坝高、边坡变化对坝体应力及位移的影响。结合胶凝砂砾石坝本构模型,以非线性有限元方法研究不同坝高及边坡对坝体应力及位移的影响。结果表明:胶凝砂砾石坝的大、小主应力均随着坝高的增大而增大,最大大主应力出现在坝基面中部;坝体小主应力等值线在下游分布大体与坝体边坡平行,小主应力的高应力区分布在上游处,且坝踵处拉应力随边坡的变陡而增大。坝体的最大水平位移与最大垂直位移均随坝高的增大而增大;随着坝坡的变陡,坝体最大水平位移增大,垂直位移等值线向下游移动。In order to check the stress and deformation of the CSG dam, to study the influence of dam height and slope change on the stress and displacement of the dam. Based on the three axis shear test data, combined with the constitutive model, the influence of different dam height and slope on the stress and displacement of the dam was studied by the nonlinear finite element method. Results show that： The major and minor principal stress of the CSG dam increase with the dam height increases, and the maximum principal stress in the middle of the base of the dam; The minor principal stress contour of the dam is roughly parallel to the slope of the dam in the downstream distribution, the high stress area of the small principal stress is distributed in the upstream, and the dam heel tensile stress will increase with the increase of slope. The maximum horizontal displacement and the maximum vertical displacement of the dam are increased with the increase of the height of the dam, along with the slope of the dam becomes steep, the maximum horizontal displacement of the dam is increased and the vertical displacement displacement contour to downstream.

关 键 词：胶凝砂砾石 非线性 坝高 边坡 应力 位移 

分 类 号：TV43[水利工程—水工结构工程]