岩质边坡流变分析的一种实用计算方法

基于等效MohrOCoulomb屈服准则原理,通过岩体材料参数的人工换算,实现其在有限元软件Ansys中的应用,并验证转化后参数与原参数之间的大小关系;同时针对边坡岩体流变特性,利用分数阶导数流变模型理论,提出考虑岩体流变特性的一种实用计算方法,通过Ansys弹塑性计算分析过程中改变材料特性的功能来处理边坡岩体材料的流变问题,算例表明该方法是可行的。

A Practical Calculation Method on Rheological Analysis for Rock Slope

Onthe basis of equivalent hypothesis,equivalent Mohr-Coulomb criterion bas been successfully applied to FEM software-Ansys by artificial conversion on jointed rock mass parameters,and all kinds of relation between the transformed parameters and original parameters are verified. At the same time,in allusion to rheological characteristics of jointed rock mass,by making use of theory of rheological model with fractional order derivatives,a practical calculation method in which rheological characteristics are taken into account has been presentted,and rheological problem on rock solpe has been managed by changing material characteristics in the process of Ansys elasticity-plasticity analysis,it is shown by a example that this method is feasible.