Peak shear strength criterion for mismatched rock joints: Revisiting JRC-JMC criterion
Peak shear strength criterion for mismatched rock joints: Revisiting JRC-JMC criterion
复制标题
不匹配岩石节理的峰值抗剪强度准则：重新审视 JRC-JMC 准则
DOI：
10.1016/j.ijrmms.2021.104894
复制
发表时间：
2021-11
影响因子：
7.2
通讯作者：
Jiao YY
中科院分区：
文献类型：
--
作者：
Tang ZC;Zhang ZF;Zou CQ;Jiao YY
具有不同匹配条件的岩石节理在自然界中广泛存在。岩体节理的峰值抗剪强度对工程结构的安全性有重要影响，但现有的岩体节理峰值抗剪强度评价标准并不适用。在这项研究中，首先通过施加各种横向位错沿着剪切方向模拟不匹配的岩石类节理，然后进行了一系列的直剪试验，以研究横向位错的峰值抗剪强度的影响。实验结果表明，即使试样具有相同的单面形貌，其峰值剪切强度也随位错量的增加而降低。建立了考虑归一化侧向位错的非匹配岩石节理峰值抗剪强度经验准则，并通过不同开度的三角形类岩石节理和天然非匹配岩石节理进行了验证。与文献中已有的判据相比，本文提出的判据更符合实验结果。最后，对该判据的局限性进行了初步讨论。
Rock joints with different matching conditions are widely existing in nature. The safety of engineering structure is significantly affected by the peak shear strength of mismatched rock joints; however, the available criteria do not work well for evaluating the peak shear strength of mismatched rock joints. In this study, the mismatched rock-like joints are first simulated by imposing various lateral dislocations along the shear direction, and then a series of direct shear tests are performed to investigate the influence of lateral dislocation on the peak shear strength. Experimental results show that the peak shear strength decreases with the increase in the lateral dislocation, even the specimens have identical single surface morphology. An empirical peak shear strength criterion with the inclusion of normalized lateral dislocation is developed to evaluate the peak shear strength of mismatched rock joint, which is further validated by tri-angular rock-like joints with various openings and natural mismatched rock joints. Compared to the available criterion in the literature, the developed one is in line with the achieved experimental results better. Finally, the limitations of the developed criterion are preliminarily discussed.
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DOI：
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发表时间：
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影响因子：
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