基于等效体积单元方法的空心坝工作特性有限元分析  

Working Behaviors of Hollow Dam Based On RVE Method by FEM

作　　者：俞昊捷 沈振中 徐力群[1,2] 张宏伟 Yu Haojie;Shen Zhenzhong;Xu Liqun;Zhang Hongwei(State Key Laboratory of Hydrology-Water Resources & Hydraulic Engineering,Hohai Univ.,Nanjing 210098,China;College of Water Conservancy & Hydropower Engineering,Hohai Univ.,Nanjing 210098,China)

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,南京210098 [2]河海大学水利水电学院,南京210098

出　　处：《三峡大学学报（自然科学版）》2019年第4期16-20,50,共6页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金/雅砻江联合基金项目(U1765205);江苏高校优势学科建设工程资助项目(水利工程)(YS11001);河海大学中央高校基本科研业务费项目(2018B55614)

摘　　要：红旗渠空心坝坝身可调节河道内过水,坝腹涵洞可运输渠水,该结构有效解决了当地水道立交的问题.由于空心坝结构特殊,对空心坝工作性态的研究分析非常少.本文对浆砌石等效体积单元(RVE)进行了单轴抗压、单轴抗拉以及纯剪有限元模拟,得到浆砌石等效体积单元的单轴抗压、单轴抗拉和纯剪应力-应变曲线,并得到相应极限强度值和对应的峰值应变值.同时基于均质化理论对红旗渠空心坝进行三维有限元模拟,计算了空心坝在正常运行工况、校核工况和地震工况下的工作特性.根据数值模拟结果可得,在地震工况下,典型截面第一主应力最大值为95.21kPa,最大变形值为0.325mm;在校核工况下,典型截面第三主应力最小值为-603.90kPa.红旗渠空心坝在3种工况下,其坝体结构满足强度安全要求,可为将来设计、施工同类型水工结构提供参考.The body of Hongqi Canal can adjust the water flow in the river course,and the culverts inside of the dam belly can transport the canal water.This structure effectively solves the problem of the interchange of the local waterways.Because of the special structure of the hollow dam,the researches and analyses of the working behaviors of the hollow dam are very few.In this paper,the uniaxial compression,uniaxial tension and pure shear of representative volume element(RVE)of masonry is simulated by finile element method(FEM).The uniaxial compression stress-strain curve,uniaxial tension stress-strain curve and pure shear stress-strain curve are obtained;and the ultimate strength and corresponding strain values are obtained.Also,the three-dimensional finite element simulation of Hongqi canal hollow dam is carried out based on homogenization theory;and the working behaviors of the hollow dam under normal operation condition,checking condition and seismic condition are calculated.According to the results,the maximum value of the first principal stress and the maximum deformation of the typical section are 95.21 kPa and 0.325 mm under the seismic condition;and the minimum value of the third principal stress of the typical section is-603.90 kPa under the checking condition.Under three working conditions;the structure of Hongqi Canal Hollow Dam can meet the strength and safety requirements,so as to provide reference for the design and construction of similar hydraulic structures in the future.

关 键 词：等效体积单元 红旗渠 空心坝 浆砌石坝 涵洞 工作特性 有限元法 

分 类 号：TV314[水利工程—水工结构工程]