Rock damage constitutive model construction method based on uniaxial load and water content

The invention relates to the technical field of rock mechanics, and discloses a rock damage constitutive model construction method based on uniaxial load and moisture content, which comprises the following steps: carrying out laboratory rock uniaxial compression tests corresponding to rock samples with different moisture content groups on the basis of a function relationship corresponding to soaking time and moisture content of a rock test piece; obtaining total stress-strain whole process data of the corresponding rock test piece under different moisture content grouping conditions; fitting the relationship between the elastic modulus and the moisture content corresponding to the rock test piece; determining rock test piece damage data generated by the water content based on a preset first damage expression formula; determining mechanical damage strain characterization data of the rock test piece under the uniaxial compression condition based on a preset mechanical damage strain characterization formula; and