深部隧道围岩分区破裂的内变量梯度塑性模型

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Abstract In plastic deformation regime，energy dissipation and self-organization phenomenon take place in rock masses surrounding tunnels，and the long-range interaction between rock particles becomes significant. Therefore，the term of internal variable gradient should be added to the constitutive model of rock masses. Gradient of effective plastic strain is introduced as an additional internal variable. Equilibrium equations and boundary conditions are derived by using the virtual work principle. Evolutionary equations for internal variables of rock masses are obtained by using the Clausius-Duhem inequality. For circular deep tunnels，the governing equation for effective plastic strain is obtained from the above model. Solution to the governing equation for ideal brittle model of rock masses is achieved. The solution may describe zonal disintegration phenomenon very well.

Key words： rock mechanics deep tunnels zonal disintegration internal variable gradient plasticity thecry

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	Articles by authors
	QI Chengzhi 1
	QIAN Qihu2
	WANG Mingyang2
	CHEN Jianjie3

Cite this article:

QI Chengzhi 1,QIAN Qihu2,WANG Mingyang2, et al. INTERNAL VARIABLE GRADIENT PLASTICITY MODEL FOR ZONAL DISINTEGRATION OF SURROUNDING ROCKS IN DEEP TUNNELS[J]. , 2012, 31(S1): 2722-2728.

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https://rockmech.whrsm.ac.cn/EN/Y2012/V31/IS1/2722

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