AUTHOR=Huang Yuxi , Hu Gaojian 

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

JOURNAL=Frontiers in Earth Science

VOLUME=Volume 11 - 2023

YEAR=2023

URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2023.1116302

DOI=10.3389/feart.2023.1116302

ISSN=2296-6463

ABSTRACT=The shear strength of the structural plane is a critical parameter in the analysis of engineering rock stability. Significant differences exist due to the various normal stresses in a structural plane. Therefore, evaluating the rock deformation to effectively obtain the influence of normal stresses at different scales on the shear strength of structural planes is of great significance. This study discusses the effects of normal stress and structural plane size on shear strength through numerical simulations and regression analysis. The results showed that when normal stress rises, the shear strength of the structural plane increases linearly. The shear strength of the structural plane decreases with the increase in size, and the corresponding curve is exponential. The characteristic size and the characteristic shear strength grow linearly with the increasing normal stress. This paper presents the concrete form of these relationships that can be utilized to calculate and predict the shear strength, which has engineering guiding significance.