| 典型滑坡危险性的接触力学预测模型 |
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| 引用本文： | 江晓禹,乔建平.典型滑坡危险性的接触力学预测模型[J].工程力学,2006,23(8):106-109,95. |
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| 作者姓名： | 江晓禹 乔建平 |
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| 作者单位： | 1. 西南交通大学应用力学与工程系,成都,610031
2. 中国科学院成都山地灾害与环境研究所,成都,610041 |
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| 基金项目： | 中国科学院知识创新工程项目 |
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| 摘 要： | 采用接触力学模型分析了边坡的滑动过程。模型中计入了可能滑坡面岩石材料强度的影响,并通过迭代计算的办法求解该边界非线性的摩擦接触问题。考虑到势能、应变能、动能、摩擦力做功等,使用逐步计算的办法来模拟滑坡的滑动过程,计算了每一个时间步中滑坡系统的能量变化。用模型进行了岩石边坡的算例研究,证明了该模型的在滑坡研究中是可行的,获得了算例边坡的滑坡启动、滑动和停止的全过程,结果表明,边坡通常存在完好状态、局部滑动状态、完全滑动状态这三个主要形态,获得了滑坡的滑动距离等重要结果。
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| 关 键 词： | 工程力学 滑坡 危险性 滑动过程 非线性 摩擦接触 |
| 文章编号： | 1000-4750（2006）08-0106-04 |
| 收稿时间： | 2004-11-13 |
| 修稿时间： | 2004-11-132005-06-30 |
CONTACT MECHANICS MODEL FOR RISK PREDICATION OF TYPICAL LANDSLIDES |
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| JIANG Xiao-yu,QIAO Jian-ping.CONTACT MECHANICS MODEL FOR RISK PREDICATION OF TYPICAL LANDSLIDES[J].Engineering Mechanics,2006,23(8):106-109,95. |
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| Authors: | JIANG Xiao-yu QIAO Jian-ping |
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| Affiliation: | 1. Dept. of Applied Mechanics and Engineering, Southwest Jiaotong University, Chengdu, Sichuang 610031, China; 2. Chengdu Institute of Mountain Disasters and Environment, The Chinese Academy of Sciences, Chengdu, Sichuang 610041, China |
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| Abstract: | Contact mechanics model is used to analyze the process of landslides. The effects of material strengths on the potential failure surface are considered. The convergence of the non-linear frictional contact boundary problem is obtained by iteration. A step-by-step procedure is used to simulate the process of landslides. The energy change of the slope system at each step is calculated, considering the strain energy, kinetic energy and the friction work. The model was used to simulate a rock slope. It is demonstrated that the model is feasible for the simulation of landslide, including the onset, the sliding and the termination. It is shown that there exist three main states in slopes, namely perfectly bounded, local sliding, and global sliding. |
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| Keywords: | engineering mechanics landslide risk slide process non-linearity frictional contact |
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