混凝土本构模型对土石坝应力变形计算结果的影响  

Influence of Concrete Constitutive Model on Stress and Deformation Calculation Results of Earth-rock Dams

作　　者：褚福永 占长胜 朱俊高[3] 许凯 李建华[1] CHU Fuyong;ZHAN Changsheng;ZHU Jungao;XU Kai;LI Jianhua(Architectural Engineering Institute of Whenzhou Polytechnic,Wenzhou 325058,China;Wenzhou Ecological Park Development and Construction Investment Group Co.,Ltd.,Wenzhou 325057,China;Key Laboratory of Ministry of Education for Geo-mechanics and Embankment Engineering,Hohai University,Nanjing 210098,China;China Southwest Architectural Survey and Design Institute Co.,Ltd.,Chengdu 610052,China)

机构地区：[1]温州职业技术学院建筑工程学院,浙江温州325058 [2]温州市生态园区开发建设投资集团有限责任公司,浙江温州325057 [3]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [4]中国建筑西南勘察设计研究院有限公司,四川成都610052

出　　处：《浙江水利水电学院学报》2024年第4期50-54,85,共6页Journal of Zhejiang University of Water Resources and Electric Power

基　　金：四川省城市特殊岩土工程技术研究中心科技研发计划资助项目(SC-TSYT-2023-01);浙江省教育厅一般项目(Y202352459)。

摘　　要：针对雅砻江两河口砾石土心墙堆石坝,坝体材料采用邓肯-张(E-ν)模型,混凝土材料分别采用线弹性和多重强化弹塑性模型,进行应力变形三维有限元计算,探讨了混凝土本构模型对坝体和混凝土结构应力变形计算结果的影响。计算结果表明,混凝土本构模型对坝体变形计算结果有较大影响,采用多重强化弹塑性计算得到的坝体最大沉降和最大水平变形,较采用线弹性模型计算得到的相应值增幅分别为2.87%和12.11%;混凝土本构模型对坝体应力计算结果影响不大,最大大小主应力值略有差异,大主应力受拱效应影响情况基本一致;混凝土本构模型虽然对防渗墙变形计算结果的影响不大,但对防渗墙应力的影响较大,采用多重强化弹塑性模型计算得到防渗墙最大大主应力较采用线弹性计算得到的相应值的增幅为18.69%,小主应力较采用线弹性模型计算得到的相应值的减幅为50.88%。A three-dimensional finite element stress deformation calculation was conducted for a gravel soil core wall rockfill dam of Lianghekou Hydropwer Station on Yalong River,in which the Duncan Zhang(E-v)was adopted for dam material while the linear elastic model and multiple strengthening elastic-plastic model was used for concrete material respectively.The calculation results show that different concrete constitutive models have a significant impact on the deformation calculation results of the dam body.The maximum settlement and maximum horizontal displacement of the dam body calculated using the elastic-plastic model have an increase of 2.87%and 12.11%compared to the corresponding values calculated using the linear elastic model,respectively.Different concrete constitutive models have little effect on the stress calculation results of the dam body,with slight differences in the maximum large and minor principal stress values.The influence of arch effect on the large principal stress is basically consistent.Different concrete constitutive models have little effect on the deformation calculation results of the anti-seepage wall,but have a significant impact on the stress of the anti-seepage wall.The maximum large principal stress of the anti-seepage wall calculated using the elastic-plastic model has an increase and decrease of 18.69%and 50.88%,respectively,compared to the corresponding values of minor principal stress calculated using linear elasticity.

关 键 词：混凝土 本构模型 土石坝 有限元 应力变形 

分 类 号：TV641.1[水利工程—水利水电工程]