摘要
基于某混凝土拱坝,结合现行拱坝设计规范,研究提出了一种基于安全因子判据的坝肩岩体动力抗滑稳定安全度分析方法。该方法综合利用有限元和(刚体)极限平衡两种方法的优点,考虑了凝聚力和摩擦力是不同的抗力,其不确定性具有较大差异性,定义了抗滑稳定安全因子,据此来判别坝肩岩体的抗滑稳定安全度,安全因子随着凝聚力与摩擦力所占权重不同而变化,这种方法既考虑了坝肩岩体与坝体的联动作用,又能够反映拱坝体系真实的工作性态。通过某混凝土高拱坝工程实例,分析了坝肩裂隙岩体的抗震稳定性,结果表明,该方法具有较高的实用价值。
Combined with a concrete arch dam and present design specifications for arch dams,a dynamic anti-sliding stability analysis method based on the safety index criterion for abutment fractured rock mass is presented.Taking comprehensive advantages of the finite element method and the rigid limit equilibrium method,and taking into account the uncertainties of different values of cohesion c and internal of friction coefficient f with large differences,this analysis method defines the anti-sliding stability safety index to evaluate anti-sliding stability safety degree of the abutment rock mass.And the anti-sliding stability safety index changes with the change of cohesive force’s and friction’s occupying weight.This method both considers coupling effect between the abutment rock mass and the dam body,and can reflect real behavior of the arch dam system.Based on a high concrete arch dam engineering,the aseismic stability of the abutment fractured rock mass is analyzed.The results show that the method has high practical value.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2012年第7期2160-2166,共7页
Rock and Soil Mechanics
关键词
坝肩抗滑稳定分析
裂隙岩体
安全因子判据
动接触模拟
非线性分析
abutment anti-sliding stability analysis； fractured rock mass； safety index criterion； dynamic contact simulation； nonlinear analysis
