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强度折减有限元法研究开挖边坡的稳定性
引用本文:连镇营,韩国城,孔宪京.强度折减有限元法研究开挖边坡的稳定性[J].岩土工程学报,2001,23(4):407-411.
作者姓名:连镇营  韩国城  孔宪京
作者单位:大连理工大学海岸和近海工程国家重点实验室!辽宁大连116024;
摘    要:用强度折减有限元方法对开挖边坡的稳定性进行了较为全面的研究。分析结果表明 :当折减系数达到某一数值时 ,边坡内一定幅值的广义剪应变自坡底向坡顶贯通 ,认为边坡破坏 ,定义此前的折减系数为安全系数 ;和强度指标相比 ,弹性模量、泊松比、剪胀角和侧压力系数对边坡的安全系数影响不大 ;开挖边坡和天然边坡具有相似的破坏形式 ,表明强度折减有限元方法适用于开挖边坡的稳定性分析。最后指出 ,强度折减有限元法具有广泛的适用性和良好的应用前景

关 键 词:强度折减技术  弹-完全塑性有限元  开挖边坡  稳定分析  
文章编号:1000-4548(2001)04-0407-05
修稿时间:2001年1月2日

Stability analysis of excavation by strength reduction FEM
LIAN Zhenying,HAN Guocheng,KONG Xianjing.Stability analysis of excavation by strength reduction FEM[J].Chinese Journal of Geotechnical Engineering,2001,23(4):407-411.
Authors:LIAN Zhenying  HAN Guocheng  KONG Xianjing
Affiliation:State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024 China
Abstract:An elasto plastic shear strength reduction FEM is used to analyze the stability of excavation slope. A well defined failure shear strain zone is formed in the excavation slope. It is found that elastic modules, Poisson′s ratio, dilation angle and lateral pressure coefficient, compared with cohesion and friction angle, have little effect on safety factor of slope. As failure pattern of excavation slope is similar with that of natural slope, it is concluded that the method is appropriate for stability analysis of excavation slope. It is believed that the shear strength reduction FE method can be widely applied in the engineering practice because this method benefits over limit equilibrium method.
Keywords:strength reduction technique  elasto  plastic FEM  excavation slope  stability
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