【摘要】 该文研究了混凝土面板堆石坝挤压墙以及其与面板接触面设置不同填料时对大坝应力变形的影响规律。应用三维有限元分析方法,对堆石料与土和结构接触面,分别采用沈珠江双屈服面弹塑性模型和清华弹塑性损伤模型,计算了面板与挤压墙之间采用不同填料时大坝的应力变形。结果表明:面板与挤压墙之间的不同填料对坝体变形应力的影响很小;采用挤压墙施工方法有助于减小面板的拉应力,并不会导致面板应力明显恶化;面板与挤压墙之间设置乳化沥青等填料有利于减小面板的应力;不同填料对面板应力的影响有较大差异,但基本分布规律是一致的。更多还原

【Abstract】 Three-dimensional finite element method was used to investigate the effect of the stress-strain response of a concrete-faced rockfill dam due to different filling materials between the face slab and interface on the extrusion wall.The behaviors of the rockfill and soil-structure interface were described by Shen’s two-yield-surface model and Tsinghua’s elasto-plasticity damage model,respectively.The FEM analysis results show that the filling materials between the face slab and extrusion wall have a small effect on the stress-strain response of the dam.The extrusion wall can decrease the tensile stress of the face slab and do not deteriorate the stress of the face slab.The filling materials between the face slab and extrusion wall can decrease the stress of the face slab;different filling materials have different effects on the face slab in a certain extent.更多还原