Statistics Characteristics and Correlation Distribution Model of Material Parameters of Low Elastic Modulus Concrete Cut-off Wall
In order to obtain the statistics characteristics and correlation distribution models of permeability coeffi-cient,elastic modulus(E-modulus)and compressive strength of concrete cutoff wall with low E-modulus,based on the test data of 2 earth-rockfill dams,AIC method was used to identify the optimum distribution of material parameters and best Copula functions for correlation distribution model.The statistical uncertainty was simulated by Bootstrap method.The results show that compressive strength,permeability coefficient and elastic modulus obey Extreme type I distribu-tion,Lognormal distribution and Weibull distribution or Extreme type I distribution,respectively,with coefficient of var-iation being 0.17,0.40 and 0.11.The average Pearson coefficient of correlation between compressive strength and perme-ability coefficient,E-modulus and compressive strength,E-modulus and permeability coefficient are-0.79,0.67 and-0.55,and the best Copula are Plackett Copula,Gaussian Copula and Gaussian Copula,respectively.The results can provide reference for seepage and strength reliability calculation of low E-modulus concrete cutoff wall.
万方数据
维普
