基于双指数剪切滑移模型的全长锚固锚杆荷载传递机制分析

doi:10.13722/j.cnki.jrme.2018.0569

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Abstract

A numerical model was presented in this study to analyze the load-transfer mechanism of fully grouted rockbolts，which was based on the bi-exponential shear-slip model of the anchorage interface and the linear enhanced elasto-plastic constitutive model of the rockbolt. It was validated by pull-out tests. The load-transfer characteristics with different anchorage lengths were studied in detail. The distribution of axial stress and shear stress along the rockbolt with anchorage length of 1.5 m was examined. The numerical results showed that it could not only describe the failure modes of interface slippage and tensile failure of rockbolts，but also determine whether the rockbolt yields during the full-range process of pullout. The reliability and accuracy of the proposed analytical model were verified by experimental pullout tests.

Key words： geotechnical engineering fully grouted rockbolt load transfer bi-exponential shear-slip model linear enhanced elasto-plastic constitutive model pull-out test

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	Articles by authors
	ZHOU Shichang1
	2
	ZHU Wancheng1
	2
	YU Shuisheng1
	2

Cite this article:

ZHOU Shichang1,2,ZHU Wancheng1, et al. Analysis of load transfer mechanism for fully grouted rockbolts based on the bi-exponential shear-slip model[J]. , 2018, 37(S2): 3817-3825.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2018.0569 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS2/3817

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