节理面剪切应力–切向位移曲线峰值后区特性的初步研究

doi:10.13722/j.cnki.jrme.2014.1336

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Abstract During shear test of joints，strength-weakening in post-peak part is observed in many types of shear stress-displacement curves. Aiming at the mechanical characteristics of rock fractures，a set of shear stress- displacement curves was analyzed，and the peak and residual strength parameters were obtained. The shear stress-displacement curve in the post-peak part was approximated in a stepwise way，and the strength-weakening process was simplified as a series of stress drop and plastic flow during the increase of shear displacement. The complete shear stress-displacement curves were modeled and compared with those obtained by lab tests. Furthermore，the internal relationship between strength-weakening and the shear stress-displacement curve in the post-peak part was studied，and the influence of dilatancy angle on the normal displacement was analyzed. The study helps to deepen the understanding of the mechanical characteristics of rock fractures.

Key words： rock mechanics complete shear stress-displacement curve strength-weakening post-peak part rock joints

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	Articles by authors
	WANG Shuilin
	GUO Mingwei
	WANG Wanjun
	ZHENG Hong

Cite this article:

WANG Shuilin,GUO Mingwei,WANG Wanjun, et al. A preliminary study of the post-peak characteristics of shear stress-displacement curves of joints[J]. , 2016, 35(S2): 3805-3812.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.1336 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS2/3805

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