基于修正邓肯–张模型的堆石料颗粒破碎研究

doi:10.13722/j.cnki.jrme.2014.1716

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Abstract Rockfill material shows obvious strength softening and dilantancy during shearing process，which can not be described effectively by the classic Duncan-Chang model. The better fitting results can be achieved by introducing modified Duncan-Chang model. The equation b－c = 0.25 is given as judgment criterion of whether the material has softened or not. Particle breakage level is connected with material strength and deformation by introducing Hardin breakage index. The results show that with the breakage level increasing，the strength decreases obviously，while deformation mostly depends on confining pressure. Based on improved Duncan-Chang model，the relationship between dilatancy d and stress ratio is given. Compared with existing theories，it shows more reasonable and convenient.

Key words： soil mechanics the modified Duncan-Chang model rockfill material particle breakage

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	Articles by authors
	LI Xuemei1
	2
	LI Hongwen1
	3
	ZHENG Minsheng1
	2
	ZHANG Xiaohua1
	2

Cite this article:

LI Xuemei1,2,LI Hongwen1, et al. Research on particle breakage of rockfill material based on modified Duncan-Chang model[J]. , 2016, 35(S1): 2695-2701.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.1716 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS1/2695

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