振动孔压增量模型在ABAQUS软件中的实现
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摘要
将依据动三轴试验建立的饱和南京细砂孔压增量模型三维化,嵌入到基于ABAQUS软件开发的修正的Davidenkov黏弹性本构模型模块中,以外挂FORTRAN子程序的方式,完成三维振动孔压增量模型在ABAQUS软件中的二次开发。对简单应力状态和复杂应力状态下的可液化地基进行数值模拟,初步验证该外挂子程序的有效应力分析能力及可靠性,表明该子程序能够较好地模拟液化场地的振动孔压发展过程,能合理地反映场地的地震液化特性和有效应力变化规律,预测场地的地震液化趋势。
A three-dimensional incremental model is created for dynamic pore water pressure(DPWP) obtained from dynamic triaxial test of saturated Nanjing fine sand.Then,this model is embedded into a three-dimensional Davidenkov viscoelastic constitutive model in ABAQUS.The secondary development of three-dimensional DPWP incremental model was achieved by executing FORTRAN subroutine.After simulating the liquefiable foundation soils under both simple and complex stress conditions,the FORTRAN subroutine is proved to be reliable and capable of analyzing effective stress.It shows that the subroutine can be used to simulate the development of DPWP in liquefiable site.In addition,the subroutine can reflect the liquefaction features and the variation of effective stress,as well as predict the liquefaction trends.
A three-dimensional incremental model is created for dynamic pore water pressure(DPWP) obtained from dynamic triaxial test of saturated Nanjing fine sand.Then,this model is embedded into a three-dimensional Davidenkov viscoelastic constitutive model in ABAQUS.The secondary development of three-dimensional DPWP incremental model was achieved by executing FORTRAN subroutine.After simulating the liquefiable foundation soils under both simple and complex stress conditions,the FORTRAN subroutine is proved to be reliable and capable of analyzing effective stress.It shows that the subroutine can be used to simulate the development of DPWP in liquefiable site.In addition,the subroutine can reflect the liquefaction features and the variation of effective stress,as well as predict the liquefaction trends.
引文
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[8]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(Zhuang Haiyang,Chen Guoxing,Liang Yanxian,et al.A developed dynamic viscoelastic constitutive relationsof soil and implemented by ABAQUS software[J].Rock andSoil Mechanics,20072,8(3):436-442(in Chinese))
[9]陈磊,陈国兴,龙慧.地铁交叉隧道近场强地震反应特性的三维精细化非线性有限元分析[J].岩土力学,2010,31(12):3971-3976(Chen Lei,Chen Guoxing,LongHui.3D refined nonlinear finite element analysis ofintersecting metro tunnels under near-field ground motion[J].Rock and Soil Mechanics,20103,1(12):3971-3976(in Chinese))
[10]陈国兴.岩土地震工程学[M].北京:科学出版社,2007
[2]孙锐,袁晓铭.非均等固结下饱和砂土孔压增量简化计算公式[J].岩土工程学报,2005,27(9):1021-1025(Sun Rui,Yuan Xiaoming.Simplified incremental formulafor estimating pore water pressure of saturated sands underanisotropic consolidation[J].Chinese Journal ofGeotechnical Engineering,2005,27(9):1021-1025(inChinese))
[3]Wang Binghui,Chen Guoxing,Jin Dandan.Pore waterpressure increment model for saturated nanjing fine sandsubject to cyclic loading[J].Earthquake Engineering andEngineering Vibration,20109,(4):569-576
[4]王炳辉,陈国兴,李方明.饱和南京细砂孔压增量模型的普适性研究[J].防灾减灾工程学报,2010(5):487-496(Wang Binghui,Chen Guoxing,Li Fangming.Extending research of the pore water pressure on saturatedNanjing fine sand[J].Journal of Disaster Prevention andMitigation Engineering,2010(5):487-496(in Chinese))
[5]Yang Z H,Elgamal A.Influence of permeability onliquefaction-induced shear deformation[J].Journal ofEngineering Mechanics,2002,128(7):720-729
[6]Papadimitriou A,Andrianopoulos K,Bouckovalas G.Efficientnumerical modeling of liquefaction-induced deformations ofsoil structures[C]//Geotechnical Earthquake Engineering andSoil DynamicsⅣ.ASCE,2008:1-10
[7]陈育民.砂土液化后流动大变形试验与计算方法研究[D].南京:河海大学,2007
[8]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(Zhuang Haiyang,Chen Guoxing,Liang Yanxian,et al.A developed dynamic viscoelastic constitutive relationsof soil and implemented by ABAQUS software[J].Rock andSoil Mechanics,20072,8(3):436-442(in Chinese))
[9]陈磊,陈国兴,龙慧.地铁交叉隧道近场强地震反应特性的三维精细化非线性有限元分析[J].岩土力学,2010,31(12):3971-3976(Chen Lei,Chen Guoxing,LongHui.3D refined nonlinear finite element analysis ofintersecting metro tunnels under near-field ground motion[J].Rock and Soil Mechanics,20103,1(12):3971-3976(in Chinese))
[10]陈国兴.岩土地震工程学[M].北京:科学出版社,2007
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