基于非线性动力分析的隧洞稳定性评价

doi:10.13722/j.cnki.jrme.2016.0463

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Abstract As the increasing of construction of underground structure engineerings，the stability of the underground engineering under complex geological and dynamic condition is becoming an increasingly important problem. Based on the Deformation Reinforcement Theory and overstress theory，the stability evaluation theory has been presented using Plastic Complementary Energy(PCE) and the unbalanced forces for the overall stability and local failure of a structure. The analysis method for the underground tunnels under earthquake loads has been presented based on three dimensional nonlinear dynamic finite element analysis，and implemented in the finite element analysis program TFINE，which is developed by Tsinghua University. The most dangerous state of underground engineering can be determined by the PCE time history，and the time history and distribution of unbalanced forces can be used to evaluate the local failure and to provide suggestion for the reinforcement. A nonlinear analysis for a tunnel model has been conducted and the displacements and stresses have been analyzed. The distribution of the yield area and the unbalanced forces is compared as well as the effect of the lining on the stability of the tunnel. The result indicates that the unbalanced forces can effectively represent local failure of the structure，which is more convincing in stability evaluation than displacements，stresses and yield areas. The PCE can quantitatively assess the overall stability of the tunnel as well as the effect of the lining. The proposed methods can be well applied to the stability evaluation of underground tunnels and other underground structures under dynamic loads.

Key words： underground engineering tunnels stability evaluation nonlinear dynamic analysis Plastic Complementary Energy time history unbalanced forces time history

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	Articles by authors
	LIU Yaoru
	WU Zheshu
	HE Zhu
	YANG Qiang
	LENG Kuangdai

Cite this article:

LIU Yaoru,WU Zheshu,HE Zhu, et al. Stability evaluation of the tunnels based on nonlinear dynamic analysis[J]. , 2017, 36(4): 3156-3163.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.0463 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/I4/3156

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