基于宏细观参数相关联的上海软土损伤变量研究

doi:10.13722/j.cnki.jrme.2015.1223

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摘要基于上海软黏土的CT实时三轴试验结果，研究软黏土的细观损伤发展的规律，探寻宏观力学参量、细观参数和损伤变量之间的关系，寻找以细观参数为基础确定损伤变量和损伤变量门槛值的方法。研究表明，CT数均值及剪应力比?与土体的损伤演化存在内在联系。提出以CT数均值为基础的损伤变量及参数的确定方法，建立损伤变量与剪应力比的线性关系式，进而建立弹性损伤模型。最后，采用此模型对试验资料进行模拟，模拟结果与试验值相一致。

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	陈驰1
	孙红1
	葛修润1
	2

关键词 ：土力学, 软土, 宏细观参数, 损伤变量, 剪应力比, 相关性

Abstract：The mesoscopic damage development in soft soil was studied based on the triaxial test results measured with the CT in real-time. The relationships among the macroscopic and mesoscopic parameters and damage variable were investigated. The damage variable and its threshold value according to the mesoscopic parameters were determined. The close relationships were found among the average CT number，the shear stress ratio η and the damage evolution. The damage variable and parameters on the basis of average CT number were defined by the meso-parameters. A linear equation between the damage variable and shear stress ratio is presented，and an elastic damage model is established. The results calculated with the presented equation are in good agreement with the experimental data.

Key words： soil mechanics soft clay macro-meso parameters damage variable stress ratio relevance

引用本文:

陈驰1，孙红1，葛修润1，2. 基于宏细观参数相关联的上海软土损伤变量研究[J]. 岩石力学与工程学报, 2016, 35(5): 1048-1054.
CHEN Chi1，SUN Hong1，GE Xiurun1，2. Damage variable for Shanghai soft soil based on the relevance of macro-meso parameters. , 2016, 35(5): 1048-1054.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2015.1223 或 http://www.rockmech.org/CN/Y2016/V35/I5/1048

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