一个考虑循环荷载作用的简化模型
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摘要
基于塑性硬化模量场理论和多重屈服面模型,结合各向同性硬化准则和移动硬化准则,在新的应力空间建立了一个新型不排水循环荷载作用下的多屈服面模型,并推导了一个适合三轴试验的简化的多屈服面模型。在此基础上,结合一个循环荷载作用下的动孔压模型,进行了饱和软黏土的动三轴模拟试验。结果表明,文中建立的多屈服面模型能够较好地模拟循环三轴试验、直剪试验和平面应变条件下的试验。
Based on the theory of field of plastic moduli and the multi-yield-surface constitutive model,and combined with isotropic hardening rule and translating hardening rule,a new multi-surface elastoplastic constitutive model was proposed in a new stress space.And a simple model which was suited to the triaxial tests,was infered.Finally,combined with a residual pore-water pressure model,the new model has been validated by means of a cyclic triaxial test of saturated soft clay.The validation indicates that the multi-yield-surface constitutive model can be used to simulate the cyclic triaxial test,direct shear test and plane strain test.
Based on the theory of field of plastic moduli and the multi-yield-surface constitutive model,and combined with isotropic hardening rule and translating hardening rule,a new multi-surface elastoplastic constitutive model was proposed in a new stress space.And a simple model which was suited to the triaxial tests,was infered.Finally,combined with a residual pore-water pressure model,the new model has been validated by means of a cyclic triaxial test of saturated soft clay.The validation indicates that the multi-yield-surface constitutive model can be used to simulate the cyclic triaxial test,direct shear test and plane strain test.
引文
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[8]BALADI G Y,RENOUD-LIAS.An elasto-plastic constitutive model for saturated and subjected to monotonic and cyclic loading[C]//The Third Inter-national Conference on Numerical Methods in Geomechnics,[s.l.]:[s.n.],1979.
[9]DESAI C S,GALLAGHER R H.Mechanics of Engineering[M].London:John Willey and Son,1984:96-103.
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[11]ROBERT Y L,FENGGANG MA.Anisotropic plasticity model for undrained cyclic behavior oclay—Ⅰ:theory[J].Journal of Geotechnical Engineering,1992,118(2):229-245.
[12]周建.饱和软黏土循环变形的弹塑性研究[J].岩土工程学报,2000,22(4):499-502.ZHOU Jian.Elastoplastic study on cyclic strain of saturated soil[J].Chinese Journal of Geotechnical Engineering,2000,22(4):499-502.
[13]MROZ Z.On the description of anisotropic work harding[J].Mechanisc and Physics of Soils,1967:15-21.
[14]PROVEST J H.Mathematical modeling of monotonic and cyclic undrained clay behavior[J].International Journal for Numerical and Analytical Methods in Geomechanics,1977,l:195-216.
[15]MROZ Z,NORRIS V A,ZIENKIEWICZ O C.An anisotropic hardening model for soil and its application to cyclic loading[J].International Journal For Numerical and Analytical Methods in Geomechanics,1978,17(3):221-253.
[16]ROSCOE K H,BURLAND J B.On the generalized stress-strain behavior of wet clay[J].Engineering Plasticity,Cambridge University,Cambridge,England,1968:535-609.
[17]顾中华,高广运.循环荷载下饱和黏土强度等效计算探讨[J].西北地震学报,2005,27(1):13-16.GU Zhong-hua,GAO Guang-yun.Discussion on equivalent calculation for shear strength of saturated clay under cyclic loading[J].Northwestern Seimological Journal,2005,27(1):13-16.
[18]SANGREY D A,HENKEL D J,ESRIG M I.The effective stress response of a saturated clay soil to repeated loading[J].Canadian Geotechniacl Journal,1969,6:241-252.
[19]顾中华.交通荷载作用下软土路基残余变形理论预测[博士论文D].上海:同济大学,2005.
[2]HARDIN B O,DRNEVICH V P.Shear modulus and damping in soils:measurement and parameter effects[J].Journal of the Soil Mechanics and Foundation Engineering Division,1972,98(6):603-624.
[3]PREVOST J H.CATHERINE M K.Shear stress-strain curve generation from simple material parameters[J].Geotechnical Engineering,1967,34(3):11-19.
[4]IWAN W D.On a class of models for the yielding behavior of continuous and composite system[J].American Society Of Mechanical Engineers,1967,34(3):21-33.
[5]MARTIN G R.Effects of system compliance on liquefaction tests[J].Journal of Geotechnical Engin-eering Division,1978,104(4):463-470.
[6]VALANIS K C.Theory fo Viscoplasticity without a yield surface[J].Archives of Mechaniscs,1971,23(4):517-551.
[7]CARTER J P,BOOKER J R,WROTHU C P.A critical state soil model for cyclic loading[C]//Soil Mechanics Transient and Cyclic Loading.Pande G N,Zienkiewicz O C,eds.London:John Willey and Son,1982:35-62.
[8]BALADI G Y,RENOUD-LIAS.An elasto-plastic constitutive model for saturated and subjected to monotonic and cyclic loading[C]//The Third Inter-national Conference on Numerical Methods in Geomechnics,[s.l.]:[s.n.],1979.
[9]DESAI C S,GALLAGHER R H.Mechanics of Engineering[M].London:John Willey and Son,1984:96-103.
[10]MATSUOKA H.Stress strain relationship of sand based on themobilized plane[J].Soils and Foundations,1974,14(2):47-61.
[11]ROBERT Y L,FENGGANG MA.Anisotropic plasticity model for undrained cyclic behavior oclay—Ⅰ:theory[J].Journal of Geotechnical Engineering,1992,118(2):229-245.
[12]周建.饱和软黏土循环变形的弹塑性研究[J].岩土工程学报,2000,22(4):499-502.ZHOU Jian.Elastoplastic study on cyclic strain of saturated soil[J].Chinese Journal of Geotechnical Engineering,2000,22(4):499-502.
[13]MROZ Z.On the description of anisotropic work harding[J].Mechanisc and Physics of Soils,1967:15-21.
[14]PROVEST J H.Mathematical modeling of monotonic and cyclic undrained clay behavior[J].International Journal for Numerical and Analytical Methods in Geomechanics,1977,l:195-216.
[15]MROZ Z,NORRIS V A,ZIENKIEWICZ O C.An anisotropic hardening model for soil and its application to cyclic loading[J].International Journal For Numerical and Analytical Methods in Geomechanics,1978,17(3):221-253.
[16]ROSCOE K H,BURLAND J B.On the generalized stress-strain behavior of wet clay[J].Engineering Plasticity,Cambridge University,Cambridge,England,1968:535-609.
[17]顾中华,高广运.循环荷载下饱和黏土强度等效计算探讨[J].西北地震学报,2005,27(1):13-16.GU Zhong-hua,GAO Guang-yun.Discussion on equivalent calculation for shear strength of saturated clay under cyclic loading[J].Northwestern Seimological Journal,2005,27(1):13-16.
[18]SANGREY D A,HENKEL D J,ESRIG M I.The effective stress response of a saturated clay soil to repeated loading[J].Canadian Geotechniacl Journal,1969,6:241-252.
[19]顾中华.交通荷载作用下软土路基残余变形理论预测[博士论文D].上海:同济大学,2005.
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