| 用新离散单元法分析混凝土重力坝的地震响应 |
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| 引用本文： | 孟茁超,蔡松柏.用新离散单元法分析混凝土重力坝的地震响应[J].水利与建筑工程学报,2006,4(3):39-42. |
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| 作者姓名： | 孟茁超 蔡松柏 |
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| 作者单位： | 1. 湖南城市学院土木工程系,湖南,益阳,413000
2. 湖南师范大学资源与环境科学学院,湖南,长沙,410081 |
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| 摘 要： | 介绍了一种新离散元列式法,并利用三节点三角形离散单元对地震荷载作用下混凝土重力坝的动力响应进行了计算机模拟,质点的动力方程采用显式中心差分法求解,几何非线性通过采用Green应变计算公式来考虑,阻尼采用Rayleigh模型,材料矩阵采用线性弹性模型,单元间接触力用有限元列式进行计算。文中给出的数值算例表明该方法具有与相同单元的有限元法精度相当,程序编制容易,占用内存小,具有一定工程应用价值。
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| 关 键 词： | 混凝土重力坝 离散单元法 动力响应 地震 工程应用 |
| 文章编号： | 1672-1144(2006)03-0039-04 |
| 修稿时间： | 2006年4月10日 |
A New Distinct Element Method for Dynamic Analysis of Concrete Gravity Dam Subjected to Strong Earthquake Load |
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| MENG Zhuo-chao,CAI Song-bai.A New Distinct Element Method for Dynamic Analysis of Concrete Gravity Dam Subjected to Strong Earthquake Load[J].Journal of Water Resources Architectural Engineering,2006,4(3):39-42. |
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| Authors: | MENG Zhuo-chao CAI Song-bai |
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| Abstract: | A new formulation of distinct element is presented,and a 3-noded triangle element is employed to simulate the dynamic response of the concrete gravity dam under strong earthquake loading.An explicit central difference time-marching scheme is adopted for time integration of the dynamic equation.In order to account for geometric non-linearity,Green's strain formula is applied for the method,and a Rayleigh damping model and a linear elastic material matrix are also used in this work.Contact force between particles is computed by the finite element formulation.Numerical computation examples for dynamic response of concrete dam show that the distinct element methods are accurate,computationally efficient,easy for programming and valuable for engineering application as well. |
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| Keywords: | concrete gravity dam distinct element method dynamic response earthquake engineering application |
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