Volume 21 Issue 2
Apr.  2013
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XIE Xing, WANG Donghong, ZHAO Fasuo. 2013: WEIBULL RANDOM DISTRIBUTION BASED DAMAGE CONSTITUTION MODEL OF LOESSIAL SOILS UNDER UNIAXIAL COMPRESSION. JOURNAL OF ENGINEERING GEOLOGY, 21(2): 317-323.
Citation: XIE Xing, WANG Donghong, ZHAO Fasuo. 2013: WEIBULL RANDOM DISTRIBUTION BASED DAMAGE CONSTITUTION MODEL OF LOESSIAL SOILS UNDER UNIAXIAL COMPRESSION. JOURNAL OF ENGINEERING GEOLOGY, 21(2): 317-323.

WEIBULL RANDOM DISTRIBUTION BASED DAMAGE CONSTITUTION MODEL OF LOESSIAL SOILS UNDER UNIAXIAL COMPRESSION

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  • Received Date: 2012-04-05
  • Rev Recd Date: 2012-07-30
  • Publish Date: 2013-04-25
  • The change of loessial soil microstructure before and after damages is analyzed by observing different cross-sections of specimen with a scanning electron microscope and a polarizing microscope. The results show that at pre-loading, the loessial soil has granulometric bracket contact microstructure with quartz, feldspar, illite, kaolinite and other minerals distributed randomly and astatically. The uniaxial compression process of the loessial soil can be divided into three stages. The first stage is a compacted phase, when microcracks close up and macropores become microcracks. The second stage is an initial damage phase which begins prior to peak stress. The soil microstructure turns to a lightly cemented mosaic microporous structure with slippages produced between particles. The original and newborn small cracks get wider and longer. The third stage is a rapid damage development phase which occurs after peak stress. The pores and cracks are interconnected, and the minerals have a pronounced directional characteristic. On this basis, constitutive damage equations are established by applying statistical damage theory using the characteristic of loessial soil micro-unit strength following the Weibull stochastic distribution, and considering the moisture content and damage threshold of loessial soil. Verification is carried out by taking the results of loessial soil uniaxial compression tests. The comparison of calculated results with test results shows that this model can properly describe the complete stress-strain test curves for loessial soil deformation and failure.
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  • [1] 刘东生, 等.黄土与环境[M].北京: 科学出版社, 1985.

    Liu Dongsheng, et al. Loess and Environment. Beijing: Science Press, 1985.

    [2] 廖红建、俞茂宏. 黄土状土和火山灰黏性土的动剪强度研究[J].西安交通大学学报, 1998, 32 (10): 70~74.

    Liao Hongjian, Yu Maohong. Dynamic shear strength of loessial soils and volcanic cohesive soils. Journal of Xi'an Jiaotong University, 1998, 32 (10): 70~74.

    [3] 黄志全、陈宇、宋日英、宋丽娟. 三门峡地区黄土状粉质黏土非饱和性质试验研究[J].岩土力学, 2010, 31 (6): 1759~1762.

    Huang Zhiquan, Chen Yu, Song Riying, Song Lijuan. Experimental study of unsaturated loess-like silty clay in Sanmenxia area. Rock and Soil Mechanics, 2010, 31 (6): 1759~1762.

    [4] 宋日英、黄志全、陈宇. 密度及水分状态对黄土状粉土变形特征的影响[J].工程地质学报, 2011, 19 (4): 492~497.

    Song Riying, Huang Zhiquan, Chen Yu. Effects of density and moisture content on the deformation of loess-like silt. Journal of Engineering Geology, 2011, 19 (4): 492~497.

    [5] 王林浩、白晓红、冯俊琴. 压实黄土状填土抗剪强度指标的影响因素探讨[J].岩土工程学报, 2010, 32 (增2): 132~135.

    Wang Linhao, Bai Xiaohong, Feng Junqin. Discussion on shearing strength influencing factors of compacted loess-like backfill. Chinese Journal of Geotechnical Engineering, 2010, 32 (S2): 132~135.

    [6] 沈珠江. 黄土损伤力学模型探索 [A].第七届土力学与基础工程学术会议论文集 [C].1994, 145~149.

    Shen Zhujiang. Loess damage mechanics model exploration. The Seventh Soil Mechanics and Foundation Engineering Symposium, 1994, 145~149.

    [7] Shen ZJ,Hu ZQ.Damage function and a masonry model for loess, Asian Conf [D]. Unsaturated soil, Singapore, 2000, 245~249.

    [8] 沈珠江, 胡再强.黄土的二元介质模型[J].水利学报,2003(7): 1~6.

    Shen Zhujiang, Hu Zaiqiang. Binary medium model for loess. Journal of Hydraulic Engineering, 2003,(7): 1~6.

    [9] 田堪良、马俊、李永红. 黄土结构性定量化参数的探讨[J].岩石力学与工程学报, 2011, 30 (增1): 3179~3184.

    Tian Kanliang, Ma Jun, Li Yonghong. Discussion on quantitative parameters of loess structure. Chinese Journal of Rock Mechanics and Engineering, 2011, 30 (S1): 3179~3184.

    [10] 罗爱忠、邵生俊. 结构性黄土损伤演化规律试验研究[J].太原理工大学学报, 2011, 42 (1): 79~82.

    Luo Aizhong, Shao Shengjun. Study on structural damage of structural loess. Journal of Taiyuan University of Technology, 2011, 42 (1): 79~82.

    [11] 王朝阳、许强、倪万魁、刘海松. 非饱和原状黄土的非线性损伤本构模型研究[J].岩土力学, 2010, 31 (4): 1108~1111.

    Wang Zhaoyang, Xu Qiang, Ni Wankui, Liu Haisong. A nonlinear damage constitutive model of unsaturated undisturbed loess. Rock and Soil Mechanics, 2010, 31 (4): 1108~1111.

    [12] 秦立科、李云璋、胡伟. 非饱和黄土结构性定量试验研究[J].岩土力学, 2011, 32 (增1): 265~269.

    Qin Like, Li Yunzhang, Hu Wei. Experimental study of the structural parameter of unsaturated loess. Rock and Soil Mechanics, 2011, 32 (S1): 265~269.

    [13] 罗晓辉, 白世伟.结构性土体强度的统计损伤模型分析[J].岩土工程学报, 2004, 26 (5): 712~714.

    Luo Xiaohui, Bai Shiwei. Model analysis on statistical damage of strength of cemented soil. Chinese Journal of Geotechnical Engineering, 2004, 26 (5): 712~714.

    [14] 张升. 岩土材料本构模型的统计损伤研究 [D].长沙:湖南大学, 2005.

    Zhang Sheng. Study on Damage Statistical Theory for the Constitutive Model of Geo-Material. Changsha: Hunan University, 2005.

    [15] 曹文贵、张升、赵明华. 饱和土变形过程模拟的统计损伤方法研究[J].岩土力学, 2008, 29 (1): 13~17.

    Cao Wengui, Zhang Sheng, Zhao Minghua. Study on simulation of deformation process of saturated soils by statistical damage theory. Rock and Soil Mechanics, 2008, 29 (1): 13~17.

    [16] 金旭, 赵成刚,陈铁林.非饱和结构性黄土本构模型的研究[J].工程地质学报, 2010, 18 (4): 548~553.

    Jin Xu, Zhao Chenggang, Chen Tielin. Study on constitutive model for unsaturated structural loess. Journal of Engineering Geology, 2010, 18 (4): 548~553.

    [17] 谢星, 王东红,赵法锁.单轴压缩下结构性Q2黄土的损伤本构模型研究[J].水文地质工程地质, 2008, 35 (3): 47~50.

    Xie Xing, Wang Donghong, Zhao Fasuo. Study on damage constitutive model of structural Q2 loess under uniaxial compression. Hydrogeology and Engineering Geology, 2008, 35 (3): 47~50.

    [18] 宋飞, 赵法锁.考虑损伤门槛的统计损伤本构模型研究[J].煤田地质与勘探, 2007, 35 (3): 59~61.

    Song Fei, Zhao Fasuo. Study on statistical damage constitutive model in consideration of damage threshold. Coal Geology and Exploration, 2007, 35 (3): 59~61.
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