摘要
将"外切线法"与强度折减技术相结合,采用拟静力法分析符合非线性Hoek-Brown破坏准则均质岩石边坡的动力稳定性。采用"外切线法"的Hoek-Brown破坏准则的瞬时抗剪强度参数(瞬时内黏聚力ct和瞬时内摩擦角φt)作为变量参数引入稳定性分析过程。采用内点迭代方法对岩坡动力稳定性拟静力安全系数的上限计算表达式进行求解,通过与已有研究成果的对比验证本文方法的有效性和正确性。为便于工程应用,将均质岩坡安全系数Fs与地质强度指标参数GSI之间的关系绘制成图形。
The outer tangent line method and the shear strength reduction technique are adopted in this paper to analyze the seismic stability of homogeneous rock slopes with nonlinear Hoek-Brown failure criterion.The instantaneous nonlinear Hoek-Brown shear strength parameters,instantaneous internal friction angle φt and instantaneous cohesive force ct were treated as variable parameters by using the outer tangent line method.The upper bound solutions for analytical expression of safety factor were presented by applying iterative optimization method.Numerical results obtained by this paper are compared with results obtained by available methods;the validity of the present method is illuminated.Results are presented in graphs of safety factors Fs versus GSI that could be used as stability analysis charts.
出处
《土木工程学报》
EI
CSCD
北大核心
2010年第S1期541-547,共7页
China Civil Engineering Journal
基金
西部交通建设科技项目(2006318802111)
中南大学优秀博士学位论文扶植项目(2008yb004),中南大学青年教师助推课题资助项目(201012200197)
