等向强化–软化Drucker-Prager材料强度参数演化

doi:10.13722/j.cnki.jrme.2016.0552

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Abstract The experimental research on the strength parameters of Drucker-Prager criterion, i.e. the coefficient of pressure sensitivity and the shearing strength of cohesion ，was rarely reported. The parameters including the internal friction angle ，the cohesion ，the coefficient of pressure sensitivity and the shearing strength of cohesion were measured simultaneously with the same group of triaxial compression tests on dense sandstone. The results show that and gradually increase with the plastic deformation in a decreasing rate，while and firstly increase to their peak values and then decrease with the plastic deformation. Five pairs of mostly used parameter conversion formulae for Mohr-Coulomb criterion and Drucker-Prager criterion were compared so that a pair of best fit conversion formulae were found with the same group of triaxial compression tests. The variation of strength parameters in Mohr-Coulomb criterion and Drucker-Prager criterion can be used to simulate the hardening and softening of geomaterials in the future numerical computation of geotechnical engineering.

Key words： geotechnical engineering Drucker-Prager criterion Mohr-Coulomb criterion coefficient of pressure sensitivity shearing strength of cohesion

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	DING Xiang
	ZHANG Guangqing

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DING Xiang,ZHANG Guangqing. Variation of strength parameters of Drucker-Prager material with isotropic hardening and softening[J]. , 2017, 36(4): 910-916.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2016.0552 OR http://www.rockmech.org/EN/Y2017/V36/I4/910

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