基于随机-模糊理论的散体物料抗剪强度参数的确定

Determination of Shear Strength Parameters of Granular Material Based on Random-fuzzy Theory

基于岩土材料力学参数随机性和模糊性的基础上,以黑箐沟散体物料中型直剪试验资料为例,提出采用随机-模糊一元线性回归方法来确定散体物料的抗剪强度参数值(c,f),并根据回归系数的数字特征公式对c,f值的波动性和相关性进行了检验。通过与最小二乘法的计算结果对比可见,随机-模糊一元线性回归方法得出的回归方程与试验点的整体符合程度要优越于最小二乘法,说明采用该方法得出的力学参数能够更好地反映散体物料固有的力学特性。

Based on randomness and fuzziness of geotechnical material mechanical parameter,then taking the experimental data of medium direct shear test from Heiqinggou as an example,random-fuzzy linear regression method is proposed to determine shear strength parameter of granular material（c,f）,meanwhile according to numerical characteristics of regression coefficient,the fluctuation and correlativity of c,f are examined.Through comparison between random-fuzzy method and least squares method,calculation result of random-fuzzy method is superior to that of least squares method.The results show that the mechanical parameter obtained by the proposed method better reflects inherent mechanical property of granular material.