【作者】 刘沐宇； 李新平；

【Author】 Liu Muyu,Li Xinping (Wuhan University of Technology,Wuhan 430070 China)

【机构】 武汉工业大学土木工程与建筑学院；

【摘要】 提出基于证据理论的岩体力学参数取值的不确定性处理方法。在构造的岩体力学参数的识别框架上,运用证据的Dempster-Shafer合成法则进行信度综合。在此基础上获得其识别框架上的基本可信度分配、信任函数和似真函数。利用似真函数来确定岩体力学参数的取值。实例分析表明:该方法反映了岩体力学参数未确知性的性质,从主观上和客观上对岩体力学参数的取值进行了信度估计,考虑因素比较全面,计算简单,使用方便。更多还原

【Abstract】 Based on the mathematical theory of evidence,an uncertainty approach to estimation of mechanical parameters of rockmass is presented. According to this approach,the discernment frame of mechanical parameters is rockmass is established.In consideration of different degrees of belief for many testing evidences of mechanical parameters of rockmass,their total degrees of belief are obtained with the Dempster-Shafer rule of combination.Meantime,the basic probability assignments,belief functions,plausibility functions of mechanical parameters of rockmass are given,and the estimation for the parameters is determined with the plausibility functions.The presented approach is applied to an example of analysis and selections for mechanical parameters of rockmass,and the satisfactory results are obtained.更多还原