加锚节理岩体流变模型及数值模拟

doi:10.13722/j.cnki.jrme.2014.s2.008

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Abstract Based on the model of jointed rock masses reinforced by passive and fully-grouted bolts，a modified model of jointed rock masses reinforced by passive and fully-grouted bolts is proposed by introducing Nishihara model. This model pays attention to the importance of viscoelastic rheology of soft-rock and hard-rock interface. Based on the modified model，the elastic-viscoelastic-viscoplastic constitutive equation is established in a 3D FEM program. The modified model is verified by the laboratory test，and the result of the modified model is more comparable with the experimental result than the result of the former model. The results of case two show that the viscoelastic rheology of rock mass will cause the increase of bolt stress. When the other parameters are fixed，the smaller the viscoelastic rheological coefficient of rock mass is，the faster the bolt stress changes，and the smaller the viscoelastic modulus of rock mass is，the greater the final bolt stress is. Without considering viscoelastic rheology of rock mass in the analysis of bolts for reinforcement of rock mass，the bolt stress will be smaller than that when considering，so that the result of the analysis will be on the safe side.

Key words： rock mechanics bolt joint rock masses elastic-viscoelastic-viscoplastic

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	Articles by authors
	LIN Yongsheng
	HE Ji
	CHEN Shenghong

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LIN Yongsheng,HE Ji,CHEN Shenghong. RHEOLOGICAL MODEL AND NUMERICAL SIMULATION OF JOINTED ROCK MASSES REINFORCED BY PASSIVE AND FULLY-GROUTED BOLT[J]. , 2014, 33(S2): 3446-3455.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.s2.008 OR https://rockmech.whrsm.ac.cn/EN/Y2014/V33/IS2/3446

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