地基变形模量对碾压混凝土拱坝应力分布的影响

王亮清; 唐辉明; 胡新丽; 张宜虎; 夏元友; 梁烨; 杨有成; 吴琼

地基变形模量对碾压混凝土拱坝应力分布的影响

1.
武汉理工大学土木工程与建筑学院, 湖北武汉 430070
2.
中国地质大学工程学院, 湖北武汉 430074
3.
水利部长江科学院, 湖北武汉 430010

基金项目:

中国地质调查局“鄂西恩施地区滑坡形成机制与危险性评价”项目 1212010640604

详细信息

作者简介:
王亮清(1972-), 男, 博士, 副教授, 主要从事水利水电工程地质与地质灾害防治研究.E-mail: wlq027@126.com

中图分类号: P642.2
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出版历程
- 收稿日期: 2007-03-19
- 刊出日期: 2007-05-25

Influences of Foundation Deformation Modulus to Stress Distribution of Roller Compacted Concrete Arch Dam

1.
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
2.
Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
3.
Scientific Institute, Changjiang Water Resources Commission, Wuhan 430010, China

摘要

摘要: 以贵州省鱼简河水利工程为背景, 在拟定坝址区地质模型和边界条件的基础上, 建立拱坝与地基相互作用的三维数学力学模型, 应用ANSYS软件研究不同变形模量对拱坝应力分布的影响.结果表明: (1) 最大主应力主要分布于坝底部位及软弱夹层附近; (2) 中间软层变形模量的大小对拱端与拱冠应力影响较大; 中间软弱层变形模量小于0.5 GPa时, 其应力差异较大; (3) 当地基为3种材料时, 最大拉压应力不是位于中间软弱层的顶部, 而是位于距离软弱层顶约10~15 m的位置, 这一结论对拱坝优化设计与坝基处理提供很好的理论依据.
- 变形模量 /
- 拱坝与地基相互作用 /
- 三维数学力学模型 /
- 应力分布
Abstract: With Yujianhe hydraulic engineering as the background and on the basis of geological module and boundary conditions of Liding dam, a 3-D mathematic and mechanical module was constructed to study the influence of different deformation modules on stress distribution by ANSYS software.The result indicates: (1) The maximum principal stresses are chiefly distributed at the bottom of the dam and close to weak intercalated layers; (2) The deformation module of weak intercalated layers affects the stresses of abutment and crown of the arch, and when it is less than 0.5 GPa, the differences of stresses are obvious; (3) When the foundation is composed of three materials, the maximum tensile and compressive stresses exist about 10-15 m to the top of the weak intercalated layers rather than at the top of them.This conclusion provides a theoretical basis for the optimal design for arch dam and dam treatment.
- deformation modulus /
- interaction of arch dam and foundation /
- 3-D mathematical and mechanical model /
- stress distribution

HTML全文

图 1 三维几何模型

Fig. 1. 3D geometrical model

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图 2 网格剖分图

Fig. 2. Meshing picture

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图 3 基础变形模量对上游坝面交界点、下游坝面交界点与拱冠剖面处最大主应力的影响(E_m为混凝土的弹性模量)

Fig. 3. Influences of deformation module of foundation on the maximum principal stress of the intersection of upper stream dam, lower stream dam and section of arch crown

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图 4 基础变形模量对上游坝面交界点、下游坝面交界点与拱冠剖面处最小主应力的影响

Fig. 4. Influences of deformation module of foundation on the minimum principal stress of the intersection of upper stream dam, lower stream dam and section of arch crown

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图 5 基础变形模量对上游坝面交界点、下游坝面交界点与拱冠剖面处铅直应力的影响

Fig. 5. Influences of deformation module of foundation on the vertical stress of the intersection of upper stream dam, lower stream dam and section of arch crown

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表 1 材料物理力学参数

Table 1. Physico-mechanical parameters of the materials

参考文献(13)

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