中南大学学报（自然科学版）2012，Vol.43Issue(9)：3589-3594,6.
反复直剪试验节理强度与粗糙度变化的研究
Shear strength and morphology characteristic evolution of joint surface under cyclic loads
摘要
Abstract
Based on the shear tests of artificial rock joints under different normal stresses for four times, the relationship among the peak shear strength, shear test times and normal stress and between the roughness coefficient and shear test times were analyzed. A new shear strength criterion and roughness coefficient Cjr degradation criterion were proposed considering the effects of both the normal stress and test times. The results show that the peak shear stress decreases gradually with the increase of the test times, and the difference is apparent between the first and the second time. The peak shear strengths of the last three times are close to each other. Under the same normal strength, Cjr decreases with the increase of the test times, but the decrease rate is slower and slower.关键词
岩石力学/节理/直剪试验/剪切次数/峰值抗剪强度Key words
rock mechanics/rock joint/direct shear test/shear times/peak shear strength分类
建筑与水利引用本文复制引用
夏才初,宋英龙,唐志成,宋英杰..反复直剪试验节理强度与粗糙度变化的研究[J].中南大学学报（自然科学版）,2012,43(9):3589-3594,6.基金项目
国家自然科学基金资助项目(40972178) （40972178）
