一种实用的土体统一弹塑-黏塑性本构模型
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摘要
针对以往本构模型或过于简单而不能全面描述土体的性质,或过于复杂而不便于应用的问题,以非线性弹性、弹塑性、艳正曼辛准则及Singh-Mitchell蠕变模型为基础,并将曼辛准则扩展至三维,建立了一种简单实用而又能同时合理地考虑土体非线性、动力滞回和流变特性的统一弹塑-黏塑性本构模型.通过试验模拟,验证了该模型的合理有效性.
Most existing constitutive models either cannot fully describe the mechanical properties of soils due to their simplicity,or cannot be applied easily due to their complexity and the difficulty of calibrating too many parameters.Based on the theories of nonlinear elasticity,elastoplasticity,modified Masing rules and the Singh-Mitchell creep model as well as the generalized Masing rules for 3D application,a simple,practical and unified elastoplastic-viscoplastic model considering the nonlinearity,cyclic hysteresis and creep behavior of soils is proposed.It has been validated through the tests.The present model is simple and convenient because the parameters have clear physical meanings and are easy to calibrate.
Most existing constitutive models either cannot fully describe the mechanical properties of soils due to their simplicity,or cannot be applied easily due to their complexity and the difficulty of calibrating too many parameters.Based on the theories of nonlinear elasticity,elastoplasticity,modified Masing rules and the Singh-Mitchell creep model as well as the generalized Masing rules for 3D application,a simple,practical and unified elastoplastic-viscoplastic model considering the nonlinearity,cyclic hysteresis and creep behavior of soils is proposed.It has been validated through the tests.The present model is simple and convenient because the parameters have clear physical meanings and are easy to calibrate.
引文
[1]DUNCAN J,CHANG C.Nonlinear analysis of stress and strain in soils[J].Journal of Soil Mechanics and Foundation Division,ASCE,1970,96(SM5):1629-1633.
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[3]刘华北.土工合成材料循环受载、蠕变和应力松弛特性的统一本构模拟[J].岩土工程学报,2006,28(7):823-828.
[4]陈学良,金星,陶夏新,等.土体动力一维非线性本构关系剖析与评价[J].地震工程与工程震动,2006,26(6):147-157.
[5]庄海洋,陈国兴,梁艳仙,等.土体动非线性黏弹性模型及其ABAQUS软件的实现[J].岩土力学,2007,28(3):436-442.
[6]HUO H B,BOBET A.Seismic design of cut and cover rectangular tunnels:evaluation of observed behavior of Dakai station during Kobeearthquake,1995[C]//Proceedings of 1st World Forum of Chinese Scholars in Geotechnical Engineering.Shanghai:[s.n.],2003:456-466.
[7]HARDIN B O,DRNEVICH V P.Shear modulus and damping in soils design equations and curves[J].Journal of Soil Mechanics andFoundation,ASCE,1972,98(7):667-692.
[8]ABAQUS Inc.Abaqus theory manual and analysis user’s manual,version 6.5[K].Providence,R I:ABAQUS Inc,2004.
[9]朱鸿鹄,陈晓平,程小俊,等.考虑排水条件的软土蠕变特性及模型研究[J].岩土力学,2006,27(5):694-698.
[10]王琛,胡德金,刘浩吾,等.三峡泄滩滑坡体滑动带土的蠕变试验研究[J].岩土力学,2003,24(6):1007-1010.
[11]王琛,张永丽,刘浩吾.三峡泄滩滑坡滑动带土的改进Singh-Mitchell蠕变方程[J].岩土力学,2005,26(3):415-418.
[12]赵志远.考虑土体结构性的修正邓肯-张模型[D].杭州:浙江大学,2003.
[13]庄海洋.土-地下结构非线性动力相互作用及其大型振动台试验研究[D].南京:南京工业大学,2006.
[14]孙益振,邵龙潭.三轴循环加卸载条件下砂性土变形特性研究[J].岩土工程学报,2005,27(11):1353-1357.
[2]KALIAKIN V N,DAFALIAS Y F.Theoretical aspects of the elastoplastic-viscoplastic bounding surface model for cohesive soils[J].Soilsand Foundations,1990,30(3):11-24.
[3]刘华北.土工合成材料循环受载、蠕变和应力松弛特性的统一本构模拟[J].岩土工程学报,2006,28(7):823-828.
[4]陈学良,金星,陶夏新,等.土体动力一维非线性本构关系剖析与评价[J].地震工程与工程震动,2006,26(6):147-157.
[5]庄海洋,陈国兴,梁艳仙,等.土体动非线性黏弹性模型及其ABAQUS软件的实现[J].岩土力学,2007,28(3):436-442.
[6]HUO H B,BOBET A.Seismic design of cut and cover rectangular tunnels:evaluation of observed behavior of Dakai station during Kobeearthquake,1995[C]//Proceedings of 1st World Forum of Chinese Scholars in Geotechnical Engineering.Shanghai:[s.n.],2003:456-466.
[7]HARDIN B O,DRNEVICH V P.Shear modulus and damping in soils design equations and curves[J].Journal of Soil Mechanics andFoundation,ASCE,1972,98(7):667-692.
[8]ABAQUS Inc.Abaqus theory manual and analysis user’s manual,version 6.5[K].Providence,R I:ABAQUS Inc,2004.
[9]朱鸿鹄,陈晓平,程小俊,等.考虑排水条件的软土蠕变特性及模型研究[J].岩土力学,2006,27(5):694-698.
[10]王琛,胡德金,刘浩吾,等.三峡泄滩滑坡体滑动带土的蠕变试验研究[J].岩土力学,2003,24(6):1007-1010.
[11]王琛,张永丽,刘浩吾.三峡泄滩滑坡滑动带土的改进Singh-Mitchell蠕变方程[J].岩土力学,2005,26(3):415-418.
[12]赵志远.考虑土体结构性的修正邓肯-张模型[D].杭州:浙江大学,2003.
[13]庄海洋.土-地下结构非线性动力相互作用及其大型振动台试验研究[D].南京:南京工业大学,2006.
[14]孙益振,邵龙潭.三轴循环加卸载条件下砂性土变形特性研究[J].岩土工程学报,2005,27(11):1353-1357.
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