| 基于等效塑性应变的边坡滑面搜索 |
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| 引用本文： | 孙冠华,郑宏,李春光.基于等效塑性应变的边坡滑面搜索[J].岩土力学,2008,29(5):1159-1163. |
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| 作者姓名： | 孙冠华 郑宏 李春光 |
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| 作者单位： | 中国科学院武汉岩土力学研究所,岩土力学与工程国家重点实验室,武汉,430071 |
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| 摘 要： | 对土坡而言,利用有限元-强度折减方法将边坡代入临界破坏状态时,临界滑面上的点往往是沿深部方向的等效塑性应变最大的地方.通过设置一系列沿水平方向布置的垂直直线,并找出沿每条直线上的等效塑性应变最大值的位置后,就可得到一系列呈波动状的点的分布,它们构成了所谓的函数型数据,再利用最小二乘法对这些函数型数据做平滑处理就得到了边坡的临界滑面.与其他方法的相对比,验证了该方法的可靠性.
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| 关 键 词： | 边坡稳定性 临界滑面 函数型数据分析 最小二乘法 等效塑性应变 边坡 滑面搜索 strain plastic equivalent based critical slip surface 验证 相对比 方法 平滑处理 乘法 最小 再利用 数据 函数 构成 分布 波动 |
| 文章编号： | 1000-7598-(2008)05-1159--05 |
| 收稿时间： | 2007-10-15 |
| 修稿时间： | 2007年10月15 |
Searching critical slip surface of slopes based on equivalent plastic strain |
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| SUN Guan-hua,ZHENG Hong,LI Chun-guang.Searching critical slip surface of slopes based on equivalent plastic strain[J].Rock and Soil Mechanics,2008,29(5):1159-1163. |
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| Authors: | SUN Guan-hua ZHENG Hong LI Chun-guang |
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| Institution: | State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
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| Abstract: | Once a soil slope is led to the limit equilibrium state by means of the finite element – strength reduction technique, usually, the critical slip surface goes through the points at which the equivalent plastic strain takes the maximum. First, some vertical lines are arranged along the horizontal direction. Then, along each of the vertical lines the point with the maximum equivalent plastic strain is found out. All such points compose a wave and make up the functional data. Finally, the functional data are smoothed by the least square method and the position of the critical slip surface is determined. The proposed procedure is confirmed through the comparison with other mature methods. |
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| Keywords: | slope stability critical slip surface functional data analysis least square method |
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