Modifying Algorithm for the Failure Stress According to the Joint Strength Formula

The comprehensive mechanical strengths of structural soil consist of two aspects of shear strength and tensile strength. Firstly, based on the tensile strength test and the conventional triaxial shear strength test, the strength features of the structural intact loess and the remolded loess were analyzed. Secondly, the joint strength formula of the structural intact loess and the remolded loess were determined by combining and fitting the results of the tensile strength test and the conventional triaxial shear strength test. Thirdly, by modifying the corresponding failure stress according to the developed joint strength formula, the modifying algorithms and computational formulas of the failure stress were further derived under the conditions of tensile failure stress state, tensile-shear failure stress state and compressive-shear failure stress state.