| 基于随机有限元的坝基渗流分析 |
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| 引用本文： | 潘健,何志虎. 基于随机有限元的坝基渗流分析[J]. 三峡大学学报(自然科学版), 2010, 32(5): 12-16 |
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| 作者姓名： | 潘健 何志虎 |
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| 作者单位： | 华南理工大学土木工程系亚热带建筑科学国家重点实验室,广州510640 |
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| 摘 要： | 采用蒙特卡罗模拟的随机有限元方法并结合渗流随机场的概念,对设置有两道防渗墙的大坝渗流问题进行了分析.研究了渗透系数标准差和空间相关距离对流量、出逸梯度和扬压力的影响.对比了确定性分析和随机有限元分析,结果表明土体渗透系数标准差和空间相关距离对流量、扬压力和出逸梯度有较显著影响.
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| 关 键 词： | 渗透系数 变异系数 随机场 随机有限元 |
Analysis of Dam Foundation Seepage with Stochastic Finte Elements |
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| Pan Jian,He Zhihu. Analysis of Dam Foundation Seepage with Stochastic Finte Elements[J]. Journal of China Three Gorges University(Natural Sciences), 2010, 32(5): 12-16 |
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| Authors: | Pan Jian He Zhihu |
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| Affiliation: | (State Key Laboratory of Subtropical Building Science,Department of Civil Engineering,South China University of Technology,Guangzhou 510640,China) |
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| Abstract: | Random field concepts for the generation of soil permeability properties with finite element methods to perform Monte Carlo simulations of the seepage problem.Analyses have been performed for the case of a dam with two cut-off walls.The effect of the standard deviation and correlation structure of the permeability on the output statistics relating to seepage quantities,exit gradients and uplift pressures are studied.In all cases,comparison is made with results that would be achieved on a deterministic basis.Flow rate and other quantities of interest are shown to be significantly affected by both the standard deviation and the correlation structure of soil permeability. |
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| Keywords: | permeability variance random fields stochastic finite elements |
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