面板水平分缝对面板堆石坝应力变形影响分析  

EFFECT OF HORIZENTAL JOINTS ON STRESS-DEFORMATION BEHAVIOR OF CFRD

作　　者：马立秋[1] 张嘎[1] 程嵩[1] 胡耘[1] 张建民[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《工程力学》2010年第10期145-149,161,共6页Engineering Mechanics

基　　金：国家重点基础研究发展计划课题项目(2007CB714108);国家自然科学基金海外及港澳学者合作项目(50828901)

摘　　要：该文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描述堆石料和土与结构接触面,对巴贡面板堆石坝面板水平分缝进行了有限元分析。给出了水平分缝不同数量、宽度时面板的应力和挠度及其分布规律。水平缝的设置对坝体的应力变形基本无影响;水平缝的数量对面板的挠度影响小;随水平缝的数量增加,顺坡向应力出现匀化现象,且最大值有减小趋势;增大面板水平缝的宽度有助于减小面板的顺坡向压应力,但作用不明显;增加面板与防浪墙缝宽度时,有利于减小面板的顺坡向压应力。The finite element method is adopted to analyze the horizontal joints of BAKUN concrete faced rockfill dam, the behavior of rockfill and the soil-structure Interface are described by using Shen’s two-yield surfaces model and the Tsinghua elasto-plasticity damage model respectively in this paper. Concrete’s stress and deflection were given with various horizontal joints numbers and width, also their distribution law. Basically,the arrangement of horizontal joints has no effect on the stress and deformations of the dam; the number of horizontal joints has little influence on the deflections of the concrete face; slope-direction stress homogenizes with the increasing number of horizontal joints, the maximum has the tendency of reduction; slope-direction stress decreases with the increasing concrete faced horizontal joints width, but the effect is not distinct; slope-direction stress will be minished with the increasing width between the concrete face and defend wave wall.

关 键 词：面板堆石坝 水平分缝 有限元 接触面 应力变形 

分 类 号：TV641.4[水利工程—水利水电工程]