高沥青混凝土心墙混合坝地震永久变形特性
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摘要
基于坝体堆石料和沥青混凝土的三轴动力试验资料,构建了坝体填筑料的残余变形经验模型和沥青混凝土的动力本构模型,采用三维有限元法建立了某沥青混凝土心墙混合坝的静动力有限元计算模型,并计算分析了坝体的地震永久变形及不同填筑料对坝体地震永久变形的影响。结果表明,沥青混凝土心墙具有良好抗震性能,原设计方案坝体的永久沉降符合大坝地震永久变形的一般规律,根据坝址料源的实况采用原设计方案更合理,可供借鉴。
Based on the triaxial dynamic test data of dam body rockfill material and asphalt concrete,empirical model of residual deformation for the filling material and dynamic constitutive model of the asphalt concrete are proposed in this paper.The static and dynamic finite element calculation model of composite dam with asphalt concrete core wall is built by the 3D FEM.Seismic permanent deformation of dam body and the different filling materials on the impact of seismic permanent deformation are also analyzed.The results show that the asphalt concrete core wall has good earthquake resistant behavior and the permanent settlement of the original designed dam body accords with the general law of the earthquake permanent deformation of the dam.According to the actual situation of the source materials of the dam site,adopting the original designed scheme is reasonable and it provides reference for engineering application.
Based on the triaxial dynamic test data of dam body rockfill material and asphalt concrete,empirical model of residual deformation for the filling material and dynamic constitutive model of the asphalt concrete are proposed in this paper.The static and dynamic finite element calculation model of composite dam with asphalt concrete core wall is built by the 3D FEM.Seismic permanent deformation of dam body and the different filling materials on the impact of seismic permanent deformation are also analyzed.The results show that the asphalt concrete core wall has good earthquake resistant behavior and the permanent settlement of the original designed dam body accords with the general law of the earthquake permanent deformation of the dam.According to the actual situation of the source materials of the dam site,adopting the original designed scheme is reasonable and it provides reference for engineering application.
引文
[1]潘家军,江凌.沥青混凝土心墙坝非线性有限元应力变形分析[A].第一届中国水利水电岩土力学与工程学术讨论会论文集(上册)[C].南京:中国水利学会岩土力学专业委员会,2006:450-453.
[2]Newmark N M.Effects of Earthquakes on Dams andEmbankments[J].Geotechnique,1965,15(2):139-160.
[3]Makdisi F I,Seed H B.Simplified Procedure forEstimating Dam and Embankment Earthquake-in-duced Deformations[J].Journal of the GeotechnicalEngineering Division,ASCE,1978,104(GT7):849-867.
[4]Seed H B,Makdisi F I,De alba P A.Performanceof Earth Dams During Earthquakes[J].Journal of theGeotechnical Engineering Division,ASCE,1978,104(GT7):967-994.
[5]朱晟.沥青混凝土心墙堆石坝三维地震反应分析[J].岩土力学,2008,29(11):2 933-2 938.
[6]Duncan J M,Chang C Y.Nonlinear Analysis of Stressand Strain in Soil[J].Journal of the Soil Mechanicsand Foundations Divison,ASCE,1970,96(SM5):1 629-1 653.
[7]清华大学.官帽舟水电站筑坝材料静动力试验报告[R].北京:清华大学,2009.
[8]西安理工大学.官帽舟水电站沥青混凝土防渗墙材料试验报告[R].西安:西安理工大学,2008.
[2]Newmark N M.Effects of Earthquakes on Dams andEmbankments[J].Geotechnique,1965,15(2):139-160.
[3]Makdisi F I,Seed H B.Simplified Procedure forEstimating Dam and Embankment Earthquake-in-duced Deformations[J].Journal of the GeotechnicalEngineering Division,ASCE,1978,104(GT7):849-867.
[4]Seed H B,Makdisi F I,De alba P A.Performanceof Earth Dams During Earthquakes[J].Journal of theGeotechnical Engineering Division,ASCE,1978,104(GT7):967-994.
[5]朱晟.沥青混凝土心墙堆石坝三维地震反应分析[J].岩土力学,2008,29(11):2 933-2 938.
[6]Duncan J M,Chang C Y.Nonlinear Analysis of Stressand Strain in Soil[J].Journal of the Soil Mechanicsand Foundations Divison,ASCE,1970,96(SM5):1 629-1 653.
[7]清华大学.官帽舟水电站筑坝材料静动力试验报告[R].北京:清华大学,2009.
[8]西安理工大学.官帽舟水电站沥青混凝土防渗墙材料试验报告[R].西安:西安理工大学,2008.
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