考虑张拉–剪切渐进破坏的边坡强度折减法研究

doi:10.13722/j.cnki.jrme.2018.0213

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Abstract The strength of rock deteriorates continuously during the progressive failure of slope and the strength reduction method to calculate the slope stability considering the tensile and shear progressive failure was therefore proposed employing the strain softening model instead of the ideal elasto-plastic model. The method was studied in terms of deterioration function，failure criterion，reduction factor，sliding surface display and reduction range. The ultimate plastic strain was used as the failure criterion for every point in the slope and all the points from the foot to the top of slope reaching the failure were taken as the failure criterion of whole slope. A quantitative index based on the initial stress method of elasto-plastic calculation was presented for displaying the complete sliding surface due to tension and shearing in the slope. The results showed that the plastic zone computed with the strain softening model is obviously smaller than that of ideal elastoplastic model，and the safety factor of slope considering tensile failure tend to be more dangerous. The tensile and shearing parts of the potential sliding surface of the slope can be displayed and distinguished at the same time by using the quantitative index.

Key words： slope engineering strength reduction method tensile failure progressive failure strain softening model

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	WANG Wei
	CHEN Guoqing
	ZHU Jing
	HUANG Runqiu

Cite this article:

WANG Wei,CHEN Guoqing,ZHU Jing, et al. Slope stability calculated with strength reduction method considering tensile and shear progressive failure[J]. , 2018, 37(9): 2064-2074.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.0213 OR http://www.rockmech.org/EN/Y2018/V37/I9/2064

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