基于率效应的岩石材料次加载面动态模型在岩体工程中的初步应用

doi:10.13722/j.cnki.jrme.2017.0383

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Abstract A stress path model with the subloading surface based on the Drucker-Prager yield criterion and the subloading surface theory was established to reflect accurately the response of rock under the action of earthquake. A dynamic constitutive model of rock material was proposed considering the rate effect of elastic modulus and strength. The proposed model was applied to the Xianglushan tunnel. The results show that the stress path model describes the Masing effect and the ratchet effect of basalt better than Drucker-Prager criterion under cyclic loading. When the rate effect is not taken into account，the slope of the stress-strain curve is smaller than that of test curve and the cumulative strain is larger than that of test curve. In the process of cyclic loading and unloading，the dynamic modulus obtained with the dynamic model is larger than that from the stress path model with subloading surface and the deformation obtained with the dynamic model is smaller than that from the stress path model with subloading surface. Therefore，the proposed model reflected well the dynamic mechanical properties and deformation properties of the rock. In comparison with the results from Drucker-Prager criterion， the instantaneous relative peak deformation between the left and right monitoring points of the tunnel from the dynamic model increased 0.67 cm，and the permanent relative deformation between the bottom and top monitoring points and between the left and right monitoring points are increased 0.19 cm and 0.77 cm respectively. This indicates that the dynamic model reflected better the large deformation of the surrounding rock. The dynamic model of rocks is more effective in filtering the high frequency than Drucker-Prager criterion and linear elastic constitutive.

Key words： rock mechanics subloading surface Drucker-Prager criterion rate effect dynamic model rock mass engineering

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	Articles by authors
	ZHOU Yongqiang1
	SHENG Qian1
	LENG Xianlun1
	ZHU Zeqi1
	FU Xiaodong1
	LI Nana2

Cite this article:

ZHOU Yongqiang1,SHENG Qian1,LENG Xianlun1, et al. #br# Preliminary application of dynamic constitutive model with subloading surface for rock materials considering rate effect in rock engineering[J]. , 2017, 36(10): 2503-2513.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2017.0383 OR http://www.rockmech.org/EN/Y2017/V36/I10/2503

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