| 强度折减DDA方法及其在稳定分析中的应用 |
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| 引用本文： | 刘 君,黄盛铨,孔宪京.强度折减DDA方法及其在稳定分析中的应用[J].岩土力学,2006,27(Z2):286-290. |
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| 作者姓名： | 刘 君 黄盛铨 孔宪京 |
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| 作者单位： | 大连理工大学 土木水利学院工程抗震研究所，大连 116024 |
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| 基金项目： | 辽宁省博士启动基金资助项目（ NO.20041077）；国家自然科学基金重点基金资助项目（NO.50538080） |
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| 摘 要： | 在自行研制的非连续变形分析（discontinuous deformation analysis,DDA）程序中实现了自动强度折减法以模拟边坡的稳定性和安全系数。通过锦屏高边坡和某重力坝深层滑动的计算分析以及与刚体极限平衡法和有限元方法的比较研究可以看出，强度折减DDA法可以较高精度求出岩石高边坡的安全系数，但求得的重力坝深层抗滑稳定安全系数要低于刚体极限平衡法的结果。基于强度折减技术的DDA与FEM的耦合方法，可以较准确地求出重力坝深层抗滑稳定安全系数。
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| 关 键 词： | 非连续变形分析(DDA) 强度折减 有限元 稳定性 |
| 收稿时间： | 2006-07-20 |
DDA with shear strength reduction technique and its
application to stability analysis |
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| LIU Jun,HUANG Sheng-quan,KONG Xian-jing.DDA with shear strength reduction technique and its
application to stability analysis[J].Rock and Soil Mechanics,2006,27(Z2):286-290. |
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| Authors: | LIU Jun HUANG Sheng-quan KONG Xian-jing |
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| Institution: | School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | An extension version of discontinuous deformation analysis (DDA) is presented. In order to calculate the safety factor of slope, the shear strength reduction technique is accomplished in the self-developed DDA program. Two examples, one is a high rock slope and the other one is a gravity dam, are simulated using this extended DDA program. From the results, we can find that the stability safety factor of rock slope can be calculated by DDA with shear strength reduction. But the safety factor of gravity dam from DDA is lower than that from limited equilibrium method and FEM. DDA coupled with FEM can give a reasonable factor of safety. The results show that DDA or DDA coupled FEM with shear strength reduction technique can be used to calculate the factor of safety and simulate the failure process of slopes. |
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| Keywords: | discontinuous deformation analysis finite elements strength reduction stability |
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