The Influence of the Number of Joints on the Size Effect of Shear Strength and Characteristic Strength

Abstract

The number of joints influences the shear and characteristic strength of structural plane; however, the relationship of the influence is yet to be derived. This study formulates 11 simulation programs using numerical simulation and realistic failure process analysis software. The influence of the number of joints and size on the shear strength of structural plane is studied. The stress-strain curves of different numbers of joints and sizes are analyzed. The mathematical models of the shear strength of structural plane and the number of joints and sizes are proposed, and their specific expressions are obtained. The mathematical models of the shear characteristic size and strength of structural plane and the number of joints are established.

Influence of normal stress on the shear strength of the structural plane considering the size effect

“…3) The relationship between CSSS, CSS, and normal stress is determined by analyzing the CSSS and CSS with normal stress change. While the REV of CSSS has been investigated (Hu et al, 2022), the exact CSSS formula for normal stress was not derived. Eqs 13 and 14 quantify and simplify the calculation of CSSS and CSS for rocks with normal stress.…”

“…Yang et al (2017) reported that the characteristic shear strength size was not as sensitive as the permeability. Hu et al (2022) determined the relationship between the number of joints and the SSSP. The aforementioned studies demonstrate the relatively limited research on the REV of the mechanical parameters of shear.…”