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XIONG Huatao. An Improved Hyperbolic Model for Silty Clay Considering Strain Softening of Soil and Freeze-Thaw Cycle Effects[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(4): 114-121. doi: 10.13204/j.gyjzG21050610
Citation: XIONG Huatao. An Improved Hyperbolic Model for Silty Clay Considering Strain Softening of Soil and Freeze-Thaw Cycle Effects[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(4): 114-121. doi: 10.13204/j.gyjzG21050610

An Improved Hyperbolic Model for Silty Clay Considering Strain Softening of Soil and Freeze-Thaw Cycle Effects

doi: 10.13204/j.gyjzG21050610
  • Received Date: 2021-05-06
    Available Online: 2022-07-25
  • In order to describe the stress-strain characteristics of strain-softening soil subjected to freeze-thaw cycling, an improved hyperbolic model was proposed. Based on the traditional Kondner hyperbolic model and the definition of secant modulus, the basic relation between dimensionless secant modulus Es/Ei and dimensionless deviation stress q/qmax was deduced through transformation of the hyperbolic model function. A set of triaxial tests were conducted on compacted silty clay specimens subjected to different confining pressures and freeze-thaw cycles. The q/qmax-Es/Ei relations before and after strain softening could be fitted by the power function, respectively. An improved hyperbolic model, which contained 8 parameters including c, φ, K, n, f, g, α and β, was proposed to reflect the strain softening characteristics. The influence of freeze-thaw cycles on soil characteristics was formulated by determining the laws of the model parameters changed with freeze-thaw cycles. The results showed with the increase of freeze-thaw cycles, the peak strength of specimens and cohesion c decreased gradually, the internal friction angle φ increased ceaselessly; the initial secant modulus decreased increasely, and the corresponding parameter K decreased at the same time, the parameter n increased steadily. The parameters f and α were the limit values which reflected secant moduli of picewise functions in the period of strain-softening, they increased or decreased gradually respectively with increase of freeze-thaw cycles.The parameters g and β reflected the shape of Es/Ei-q/q curves before and after strain-softening, and g decreased steadily with the increasing of freeze-thaw cycles and β changed in fluctuation. The relations of the above parameters to freeze-thaw cycles could be fitted by the Logistic function. The improved model and representation expressions for model parameters were programmed into a calculation software, which taking the confining pressure and freeze-thaw cycles as the variables. The calculation results by the model could reflect the influence of confining pressure and freeze-thaw cycles on the mechanical properties of soil.
  • [1]
    MITCHELL J K,SOGA K.Fundamentals of soil behavior[M].New York:Wiley& Sons,2005.
    [2]
    沈珠江.应变软化材料的广义孔隙压力模型[J].岩土工程学报,1997,19(3):14-21.
    [3]
    ANDERSLAND O B,LADDANYI B.Frozen ground engineering[M].New York:Wiley& Sons,Inc.,2004.
    [4]
    LIU J K,CHANG D,YU Q M.Influence of freeze-thaw cycles on mechanical properties of a silty sand[J].Engineering Geology,2016,210(5),23-32.
    [5]
    常丹,刘建坤,李旭.冻融循环下粉砂土应力-应变归一化特性研究[J].岩土力学,2015,36(12):3500-3505.
    [6]
    崔宏环,刘建坤,张立群,等.考虑冻融循环的季冻区高等级公路路基填土本构模型研究[J].岩土力学,2015,36(8):2228-2236.
    [7]
    常丹,刘建坤,李旭.冻融循环下青藏粉砂土双屈服面本构模型研究[J].岩石力学与工程学报,2016,35(3):623-630.
    [8]
    姚仰平,张丙印,朱俊高.土的基本特性、本构关系及数值模拟研究综述[J].土木工程学报,2012,45(3):127-150.
    [9]
    HASHIGUCHI K,CHEN Z P.Elastoplastic constitutive equations of soils with subloading surface and rotational hardening[J].Int.J.Numer.Anal.Meth.Geomech.,1998(22):917-927.
    [10]
    ASAOKA A,NAKANO M,NODA T.Elastoplastic behavior of structured overconsolidated soils[J].J Appl Mech,JSCE,2000(3):335-342.
    [11]
    姚仰平,侯伟,周安楠.基于Hvorslev面的超固结土本构模型[J].中国科学E辑:技术科学,2007,37(11):1417-1429.
    [12]
    黄茂松,扈萍,张宏博.考虑剪胀性和应变软化的粉细砂双屈服面本构模型[J].水利学报,2008,39(2):129-136.
    [13]
    LEE J H,SALGADO R,CARRARO J A H.Stiffness degradation and shear strength of silty sands[J].Canadian Geotechnical Journal,2004,41:831-845.
    [14]
    沈珠江.结构性黏土的弹塑性损伤模型[J].岩土工程学报,1993,15(3):21-28.
    [15]
    沈珠江.结构性黏土的非线性损伤力学模型[J].水利水运科学研究,1993(3):247-255.
    [16]
    王立忠,赵志远,李玲玲.考虑土体结构性的修正邓肯-张模型[J].水利学报,2004(1):83-89.
    [17]
    DESAI C S,TOTH J.Disturbed state constitutive modeling based on stress-strain and nondestructive behavior[J].International Journal of Solids and Structures,1996,33(11):1619-1650.
    [18]
    王常明,匡少华,王钢城,等.结构性土固结不排水剪特性的一种描述方法[J].岩土力学,2010,31(7):2035-2039.
    [19]
    FAHEY M,CARTER J P.A finite element study of the pressure meter test in sand using a nonlinear elastic plastic model[J].Canadian Geotechnical Journal,2011,30(2):348-362.
    [20]
    王军,丁光亚,潘林有,等.静三轴试验中水泥土力学特性及本构模型研究[J].岩土力学,2010,31(5):1407-1412.
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