周边缝对U形河谷拱坝应力位移的影响
发布时间：2019-03-07 21:35
【摘要】：针对宽底的U形河谷拱坝坝踵常出现过大拉应力的问题,以某U形河谷拱坝为例,利用ANSYS三维有限元分析软件,通过设立5组不同的计算组合,分析研究了材料非线性、设置不同范围的周边缝对拱坝位移场、应力场及坝体可能存在开裂区的影响。结果表明,设缝后拱冠梁表现出顺河向的平移和倒向上游的转动两种刚体位移趋势,拱冠梁截面上游面的梁向拉应力减小甚至出现压应力,下游压应力也有所减小,周边缝设缝范围的改变对拱坝的应力及坝体可能存在的开裂状况影响不大。
[Abstract]:In order to solve the problem of excessive tensile stress in the heel of U-shaped arch dam with wide bottom, taking a U-shaped arch dam as an example, the material non-linearity is analyzed and studied by setting up five groups of different calculation combinations by using ANSYS three-dimensional finite element analysis software, and using the software of three-dimensional finite element analysis of U-shaped valley arch dam. The influence of different range of peripheral joints on the displacement field, stress field and dam body of arch dam may be affected by the crack zone. The results show that there are two kinds of rigid body displacement trends in the arch crown beam, which are river-oriented translation and reverse-upstream rotation. The beam tensile stress on the moving surface of the arch crown beam section decreases and even appears compressive stress, and the downstream compressive stress also decreases to a certain extent. The change of the range of the surrounding joints has little effect on the stress of arch dam and the possible cracking of the dam body.
【作者单位】： 武汉大学水资源与水电工程科学国家重点实验室;河南省水利勘测设计研究有限公司;
【分类号】：TV642.4
本文编号：2436472
[Abstract]:In order to solve the problem of excessive tensile stress in the heel of U-shaped arch dam with wide bottom, taking a U-shaped arch dam as an example, the material non-linearity is analyzed and studied by setting up five groups of different calculation combinations by using ANSYS three-dimensional finite element analysis software, and using the software of three-dimensional finite element analysis of U-shaped valley arch dam. The influence of different range of peripheral joints on the displacement field, stress field and dam body of arch dam may be affected by the crack zone. The results show that there are two kinds of rigid body displacement trends in the arch crown beam, which are river-oriented translation and reverse-upstream rotation. The beam tensile stress on the moving surface of the arch crown beam section decreases and even appears compressive stress, and the downstream compressive stress also decreases to a certain extent. The change of the range of the surrounding joints has little effect on the stress of arch dam and the possible cracking of the dam body.
【作者单位】： 武汉大学水资源与水电工程科学国家重点实验室;河南省水利勘测设计研究有限公司;
【分类号】：TV642.4
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