基于等效黏弹性模型获取土体最大动剪模量的计算方法

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Abstract The maximum dynamic shear modulus(Gmax) is a very important parameter in describing the dynamic constitutive equation of soil. Gmax reflects the dynamic response of soil modulus and damping ratio directly，which changes with dynamic strain. Generally，Gmax is got by semi-quantitative formula in existed methods，and a lot of engineering experiences are needed. But in fact，Gmax is unique and constant. From this aspect，based on equivalent viscous elastic theory，the modified Davidenkov model is taken into account；and it is widely applicability for describing the dynamic behavior of soil. Based on dynamic triaxial test for three types of soil samples and according to the three parameters contain in modified Davidenkov model，the anti-analysis algorithm based on multiple regressions and self-adapting approximation is proposed to achieve Gmax and the factors required in Davidenkov model. The result shows that：with this algorithm，the dual constraints conditions above is carried out to fit test data. Under the premise of minimizing the residuals of Gmax，the fitting curve can describe the dynamic response behavior of soil very well within small strain condition. This algorithm is good at circumventing the difficulty of getting Gmax directly，and finally，the dynamic constitutive equation for three types of soil samples is achieved.

Key words： soil mechanics modified Davidenkov model maximum dynamic shear modulus Gmax self-adapting approximation algorithm dynamic triaxial test

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	Articles by authors
	XIANG Wei1
	JIANG Jiwei2
	JOACHIM Rohn3

Cite this article:

XIANG Wei1,JIANG Jiwei2,JOACHIM Rohn3. AN ALGORITHM FOR QUANTITATIVELY ACHIEVING MAXIMUM DYNAMIC SHEAR MODULUS(GMAX) OF SOIL BASED ON EQUIVALENT VISCO-ELASTIC MODEL[J]. , 2013, 32(s2): 4082-4091.

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/4082

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