Inversion analysis of meso-level parameters of cemented sand-gravel material based on improved genetic algorithm
Aiming at the problem that the parameters of the meso layer of cemented sand gravel can not be obtained by traditional laboratory tests,an inverse analysis method of the parameters of the meso layer of cemented sand gravel based on improved genetic algorithm is proposed.Taking the results of laboratory uniaxial compression test of cemented sand and gravel as the inversion target value,the random aggregate model of cemented sand and gravel specimen for laboratory test is established through finite element software simulation,and the microscopic component parameters of cemented sand and gravel are determined through inversion analysis,which solves the problem that the parame-ters cannot be obtained in laboratory test.The research results show that:under this test condition,the numerical simulation results of laboratory tests on the meso component parameters determined by back analysis are basically consistent with the test values,the final value of the elastic modulus of the aggregate of the cemented sand gravel is EG=550 MPa,the final value of the elastic modulus of the mortar matrix is Em=40 MPa,and the final value of the elastic modulus of the interface is Ei=30 MPa.
cemented sand and gravelmeso leveluniaxial compressionimproved genetic algorithminversion analysis
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