强震作用下松散海床地基的动力响应
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摘要
海上和沿海区域砂性土地基在强震作用下需同时考虑液化、震陷以及流滑效应。选用杨朝晖叠套屈服面模型,提出了获取计算参数的简化方法,用OpenSees验证了该模型模拟液化的能力;开发了OpenSees与ANSYS的接口,对处于强震地区、地基土为松散砂性土的印尼某进水明渠堤坝进行了非线性有限元动力计算,判断了场地的液化情况,预测了堤坝及地基的震陷量和侧向流滑,计算结果对该类地基的加固处理具有一定的指导意义。
Liquefaction,seismic subsidence and lateral spreading should be considered when a sandy foundation in the seabed or maritime province sustains meizoseismic load.Zhaohui Yang's nested constitutive mode is incorporated into OpenSees to evaluate its capacity of simulating soil liquefaction;and a simple method to get parameters is introduced.An interface between OpenSees and ANSYS is constructed;and then a dam on loose sandy foundation which is in the strong earthquake area is analyzed by the nonlinear finite element method.The results give out the liquefaction condition of the foundation and predict the seismic subsidence and lateral spreading,it would help us to do the foundation reinforcement treatment with such cases.
Liquefaction,seismic subsidence and lateral spreading should be considered when a sandy foundation in the seabed or maritime province sustains meizoseismic load.Zhaohui Yang's nested constitutive mode is incorporated into OpenSees to evaluate its capacity of simulating soil liquefaction;and a simple method to get parameters is introduced.An interface between OpenSees and ANSYS is constructed;and then a dam on loose sandy foundation which is in the strong earthquake area is analyzed by the nonlinear finite element method.The results give out the liquefaction condition of the foundation and predict the seismic subsidence and lateral spreading,it would help us to do the foundation reinforcement treatment with such cases.
引文
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[3]颜可珍,刘能源,夏唐代.基于判别分析法的砂土液化预测研究[J].岩土力学,2009,30(7):2049-2052.YAN Ke-zhen,LIU Neng-Yuan,XIA Tang-dai.Discriminant analysis model for prediction of sand soil liquefaction during earthquake[J].Rock and Soil Mechanics,2009,30(7):2049-2052.
[4]YANG Z H.Numerical modeling of earthquake site response liquefaction[D].New York:Department of Civil Engineering and Engineering Mechanics,Columbia University,2000.
[5]PREVOST J H.A simple plasticity theory for frictional cohesionless soils[J].Soil Dynamics and Earthquake Engineering,1985,4(1):9-17.
[6]ISHIHARA K.Stability of natural deposits during earthquakes[C]//Proceedings of the 11th International Conference on Soil Mechanics and Foundation Engineering.Rotterdam:Balkemma A A,1985:321-376.
[7]MROZ Z.On the description of anisotropic work harding[J].Journal of the Mechanics and Physics of Solids,1967,15:163-175.
[8]SILVIA M,MCKENNA F,Scott M.H.,et al.OpenSees command language manual[EB/OL].(2006-06-14)[2008-11-01].http//:openSees.berkeley.edu.
[9]LIAO S,WHITMAN R V.Overburden correction factors for SPT in sand[J].Journal of Geotechnical Engineering,ASCE,1986,112(3):373-377.
[10]YOUD T L,IDRISS I M.Liquefaction resistance of soils:summary report from the 1996 NCEER and 1998 NCEER/NSF workshops on evaluation of liquefaction resistance of soils[J].Journal of Geotechnical and Geoenvironmental Engineering,ASCE,2001,127(4):297-313.
[11]ANDRUS R D,STOKOE K H.Liquefaction resistance based on shear wave velocity[J].Journal of Geotechnical and Geoenvironmental Engineering,ASCE,2000,126(11):1015-102.
[12]HALDAR A.Probabilistic evaluation of liquefaction of sand under earthquake motion[D].Illinois:University of Illinois Urbana Champaign,1976.00..200 20 40 60 80 10000..641021111.......0288640侧向滑移/m时间/s 18 m深11 m深4.5 m深
[2]刘汉龙,陈育民.动扭剪试验中砂土液化后流动特性分析[J].岩土力学,2009,30(6):1537-1541.LIU Han-long,CHEN Yu-min.Analysis of flow characteristics of dynamic torsional tests on post liquefied sand[J].Rock and Soil Mechanics,2009,30(6):1537-1541.
[3]颜可珍,刘能源,夏唐代.基于判别分析法的砂土液化预测研究[J].岩土力学,2009,30(7):2049-2052.YAN Ke-zhen,LIU Neng-Yuan,XIA Tang-dai.Discriminant analysis model for prediction of sand soil liquefaction during earthquake[J].Rock and Soil Mechanics,2009,30(7):2049-2052.
[4]YANG Z H.Numerical modeling of earthquake site response liquefaction[D].New York:Department of Civil Engineering and Engineering Mechanics,Columbia University,2000.
[5]PREVOST J H.A simple plasticity theory for frictional cohesionless soils[J].Soil Dynamics and Earthquake Engineering,1985,4(1):9-17.
[6]ISHIHARA K.Stability of natural deposits during earthquakes[C]//Proceedings of the 11th International Conference on Soil Mechanics and Foundation Engineering.Rotterdam:Balkemma A A,1985:321-376.
[7]MROZ Z.On the description of anisotropic work harding[J].Journal of the Mechanics and Physics of Solids,1967,15:163-175.
[8]SILVIA M,MCKENNA F,Scott M.H.,et al.OpenSees command language manual[EB/OL].(2006-06-14)[2008-11-01].http//:openSees.berkeley.edu.
[9]LIAO S,WHITMAN R V.Overburden correction factors for SPT in sand[J].Journal of Geotechnical Engineering,ASCE,1986,112(3):373-377.
[10]YOUD T L,IDRISS I M.Liquefaction resistance of soils:summary report from the 1996 NCEER and 1998 NCEER/NSF workshops on evaluation of liquefaction resistance of soils[J].Journal of Geotechnical and Geoenvironmental Engineering,ASCE,2001,127(4):297-313.
[11]ANDRUS R D,STOKOE K H.Liquefaction resistance based on shear wave velocity[J].Journal of Geotechnical and Geoenvironmental Engineering,ASCE,2000,126(11):1015-102.
[12]HALDAR A.Probabilistic evaluation of liquefaction of sand under earthquake motion[D].Illinois:University of Illinois Urbana Champaign,1976.00..200 20 40 60 80 10000..641021111.......0288640侧向滑移/m时间/s 18 m深11 m深4.5 m深
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