新型柔性路面结构非线性分析方法研究
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摘要
为预测敷设于松软泥泞地基之上的柔性路面在车辆荷载下的静力性能,选取DuncanChang本构模型模拟地基土体非线性弹性力学特性,将柔性路面结构简化为膜-梁单元力学模型。考虑路面结构受载大变形、地基与路面的接触非线性,采用有限元分析软件Abaqus建立柔性路面结构的非线性分析模型,得出了路面结构受载后变形和内力响应等结果,并通过实载试验验证了数值分析结果的准确性。结果表明,基于Duncan-Chang本构模型的路面结构非线性分析方法能够满足工程分析要求。
In order to predict the static mechanical performance of flexible pavement laid on swampy ground under vehicle load,Duncan-Chang constitutive model is selected to simulate the nonlinear elastic properties of ground soil. The flexible pavement is simplified as a mechanical model of membrane-beam element,and the large deformation and contact nonlinearity of flexible pavement are also consisted. A nonlinear analysis model of flexible pavement structure is established by using the finite element analysis software ABAQUS,and the deformation and internal force response of the flexible pavement under load are obtained. The numerical analysis result is verified with the load test result. The result shows that the nonlinear analysis method of flexible pavement structure based on Duncan-Chang constitutive model can meet the requirements of engineering analysis.
In order to predict the static mechanical performance of flexible pavement laid on swampy ground under vehicle load,Duncan-Chang constitutive model is selected to simulate the nonlinear elastic properties of ground soil. The flexible pavement is simplified as a mechanical model of membrane-beam element,and the large deformation and contact nonlinearity of flexible pavement are also consisted. A nonlinear analysis model of flexible pavement structure is established by using the finite element analysis software ABAQUS,and the deformation and internal force response of the flexible pavement under load are obtained. The numerical analysis result is verified with the load test result. The result shows that the nonlinear analysis method of flexible pavement structure based on Duncan-Chang constitutive model can meet the requirements of engineering analysis.
引文
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[2]范华林,刘福君,甘智海.车辆-路面器材相互作用机理研究[J].兵工学报,2007,28(1):28-32.FAN Hua-lin,LIU Fu-jun,GAN Zhi-hai.Interaction-terramechanics of vehicles on mechanized road equiment[J].Acta Armamentarii,2007,28(1):28-32.(in Chinese)
[3]李林,程营.制式路面器材设计参数的选择[J].工兵装备研究,2004,23(1):16-19LI Lin,CHENG Ying.The selection of design parameters about standard pavement equipment[J].Engineer Equipment Research,2004,23(1):16-19.(in Chinese)
[4]Duncan J M,Chang C Y.Non-linear analysis of stresses and strain in soils[J].Journal of the Soil Mechanics and Foundations Division,1970,96(5):1629-1652.
[5]石亦平,周玉蓉.ABAQUS有限元分析实例详解[M].北京:机械工业出版社,2006:55-56.SHI Yi-ping,ZHOU Yu-rong.Detailed finite element analysis of ABAQUS[M].Beijing:China Machine Press,2006:55-56.(in Chinese)
[6]Kondner R L.Hyperbolic stress-strain response cohesive soils[J].Journal of the Soil Mechanics and Foundations Division,1963,89(1):115-143.
[7]王金昌,陈页开.ABAQUS在土木工程中的应用[M].杭州:浙江大学出版社,2006:47-53,101-104.WANG Jin-chang,CHEN Ye-kai.ABAQUS application in civil engineering[M].Hangzhou:Zhejiang University Press,2006:47-53,101-104.(in Chinese)
[8]程营,李林,陈浩.应用I—deas软件对正交异性材料进行结构有限元分析[J].工兵装备研究,2002,21(4):4-18.CHENG Ying,LI Lin,CHEN Hao.Application of I-deas in finite element structural analysis of orthotropic materials[J].Engineer Equipment Research,2002,21(4):4-18.(in Chinese)
[9]陈亚东,宰金珉,戚科骏.群桩与土和承台结构非线性相互作用机理的数值分析[J].建筑科学,2007,23(7):24-27.CHEN Ya-dong,ZAI Jin-min,QI Ke-jun.Numerical analysis of nonlinear interaction mechanism to pile-raft-soil[J].Buliding Science,2007,23(7):24-27.(in Chinese)
[10]何昌荣,杨桂芳.邓肯-张模型参数变化对计算结果的影响[J].岩土工程学报,2002,24(2):170-174HE Chang-rong,YANG Gui-fang.Effects of parameters of Duncan-Chang model on calculated results[J].Chinese Journal of Geotechnical Engineering,2002,24(2):170-174.(in Chinese)