地震荷载作用下被动侧土压力计算方法研究
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摘要
地震土压力的评价是土力学和岩土工程领域的基本研究课题之一。以往的研究结果表明,挡墙的位移量和位移模式对于地震土压力大小和分布具有显著影响。实际工程中,地震荷载下挡土墙后填土通常处于主动和被动状态之间。经典的物部-冈部公式只能计算主动和被动极限状态下的地震土压力,未考虑填土的侧向变形对于土压力的影响。文中基于拟静力法和曲面中间滑楔体的概念,给出了挡墙平动模式时,任意侧向变形条件下的被动侧地震土压力计算方法。在此基础上采用所提方法对一典型的挡土墙系统的被动侧地震土压力进行了计算,给出了地震土压力系数的计算图表,并与基于平面滑动面假定的计算结果进行了对比,讨论了平面滑动面所导致的误差。
The evaluation of seismic earth pressure is one of the key subjects in soil mechanics and geotechnical engineering.Previous studies indicate that the mode and amount of wall displacement has a significant effect on the magnitude and distribution of earth pressure.In engineering practice,the seismic earth pressure may fall anywhere between active and passive pressures.Classic Mononobe-Okabe solutions can only give solutions for seismic earth pressures at the active and passive states.In this paper,based on the concept of pseudo-static analysis and the intermediate soil wedge with curved surface,a new methodology is developed to evaluate seismic earth pressures at the passive side under any boundary strain constraint for a rigid retaining structure with translational movement.On the basis,the seismic earth pressure of a typical retaining wall system is calculated by the proposed method,and a chart for the seismic earth pressure coefficients is provided.In addition,a comparison is made between the results got by the proposed method and those obtained based on the planar surface assumption.
The evaluation of seismic earth pressure is one of the key subjects in soil mechanics and geotechnical engineering.Previous studies indicate that the mode and amount of wall displacement has a significant effect on the magnitude and distribution of earth pressure.In engineering practice,the seismic earth pressure may fall anywhere between active and passive pressures.Classic Mononobe-Okabe solutions can only give solutions for seismic earth pressures at the active and passive states.In this paper,based on the concept of pseudo-static analysis and the intermediate soil wedge with curved surface,a new methodology is developed to evaluate seismic earth pressures at the passive side under any boundary strain constraint for a rigid retaining structure with translational movement.On the basis,the seismic earth pressure of a typical retaining wall system is calculated by the proposed method,and a chart for the seismic earth pressure coefficients is provided.In addition,a comparison is made between the results got by the proposed method and those obtained based on the planar surface assumption.
引文
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[4]Matsuzawa H,Matsumura A.Passive earth pressure during earthquakes[C].Proceedings of the 1st International Conference on Recent Advancesin Geotechnical Earthquake Engineering and Soil Dynamics,Rolla,Missouri,1981,715-720.
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[7]Zhang J M,Shamaoto Y,Tokimatsu K.Seismic earth pressure theory for retaining walls under any lateral displacement[J].Soils and Founda-tions,1998,38(2):143-163.
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[14]Chang MF.Lateral earth pressure behind rotating walls[J].Canadian Geotechnical Journal,1997,34(2):498-509.
[15]徐日庆,龚慈,魏刚,等.考虑平动位移效应的刚性挡土墙土压力理论[J].浙江大学学报(工学版),2005,39(1):119-122.
[16]张建民,宋飞.砂土的压剪效应与渐近状态准则[J].岩土工程学报,2008,30(2):166-171.
[17]宋飞.考虑侧向变形的各向异性填土土压力计算方法及试验研究[D].北京:清华大学,2009.
[18]宋飞,张建民.考虑挡墙位移效应的被动侧土压力计算方法[J].岩土力学,2011.
[19]宋飞,张建民,张嘎,等.等应变增量比试验控制功能的开发与实现.岩土工程学报,2009,31(7):1144-1148.
[20]宋飞,张建民.各向异性砂土渐近状态试验研究[J].岩土工程学报,2010,32(4):551-561.
[21]宋飞,刘超,张建民,等.离心模型挡土墙试验设备的研制与开发[J].岩土力学.2010,31(9)3005-3011.
[22]宋飞,张建民.考虑侧向变形的各向异性砂土土压力试验研究[J].岩石力学与工程学报,2009,1884-1895.
[23]宋飞,张建民,刘超.各向异性砂土K0试验研究[J].岩土力学,2010.12(待发表).
[24]宋飞,张建民.各向异性砂土主动侧土压力计算方法[J].岩土力学,2011(待发表).
[25]Song Fei,Zhang Jian-min.Centrifuge modeling of active earth pressures[C]∥Proceedings of the 7th International Conference on Physical Mod-eling in Geotechnics,2010:505-509.
[26]Zhang JianMin,Song Fei,Li Deji.Effect of strain localization on seismic active earth pressure[J].Journal of Geotechnical and Geoenvironmen-tal Engineering,ASCE,2010,999-1003
[27]宋飞,张建民.超固结土的主动土压力求解方法[C]∥第二届全国岩土与工程大会会议论文集,2006:470-475.
[28]宋飞,张建民.水平层分析法求解超固结土的地震主动土压力[C]∥第七届全国土动力学会议论文集,2006:91-95.
[2]Matsuo H,Ohara S.Lateral earth pressure and stability of quay walls during earthquakes[C].Proceedings of 2nd World Conference on Earth-quake Engineering.Tokyo,1960,1:165-183.
[3]Ishii Y,Arai H,Tsuchida H.Lateral earth pressure in an earthquake[C].Proceedings of the 2nd World Conference on Earthquake Engineering,Tokyo,1960,1:211-230.
[4]Matsuzawa H,Matsumura A.Passive earth pressure during earthquakes[C].Proceedings of the 1st International Conference on Recent Advancesin Geotechnical Earthquake Engineering and Soil Dynamics,Rolla,Missouri,1981,715-720.
[5]Sherif M,Ishibashi I,Lee C D.Earth pressures against rigid retaining walls[J].Journal of geotechnical engineering,ASCE,1982,108(GT5):679-695.
[6]Zhang J M,Shamoto Y,Tokimatsu K.Evaluation of earth pressure under any lateral deformation[J].Soils and Foundations,1998,38(1):15-33.
[7]Zhang J M,Shamaoto Y,Tokimatsu K.Seismic earth pressure theory for retaining walls under any lateral displacement[J].Soils and Founda-tions,1998,38(2):143-163.
[8]Terzaghi K.Theoretical Soil Mechanics[M].Wiley:New York,1943.
[9]Morrison E E,Ebeling R M.Limit equilibrium computation of dynamic passive earth pressure[J].Canadian Geotechnical Journal,1995,32(3):481-487.
[10]Kumar J.Seismic passive earth pressure coefficients for sands[J].Canadian Geotechnical Journal,2001,38(4):876-881.
[11]Subba Rao K S.and Choudhury D.S.M.Seismic passive earth pressures in soils[J],Journal of Geotechnical and Geoenvironmental Engineer-ing.2005,131(1):131-135.
[12]Dubrova G A.Interaction of soil and structures.Rehnoy Transport[M].Moscow,U.S.S.R.1963.
[13]Bang S.Active earth pressure behind retaining walls[J].Journal of Geotechnical Engineering.1985,111(3):407-412.
[14]Chang MF.Lateral earth pressure behind rotating walls[J].Canadian Geotechnical Journal,1997,34(2):498-509.
[15]徐日庆,龚慈,魏刚,等.考虑平动位移效应的刚性挡土墙土压力理论[J].浙江大学学报(工学版),2005,39(1):119-122.
[16]张建民,宋飞.砂土的压剪效应与渐近状态准则[J].岩土工程学报,2008,30(2):166-171.
[17]宋飞.考虑侧向变形的各向异性填土土压力计算方法及试验研究[D].北京:清华大学,2009.
[18]宋飞,张建民.考虑挡墙位移效应的被动侧土压力计算方法[J].岩土力学,2011.
[19]宋飞,张建民,张嘎,等.等应变增量比试验控制功能的开发与实现.岩土工程学报,2009,31(7):1144-1148.
[20]宋飞,张建民.各向异性砂土渐近状态试验研究[J].岩土工程学报,2010,32(4):551-561.
[21]宋飞,刘超,张建民,等.离心模型挡土墙试验设备的研制与开发[J].岩土力学.2010,31(9)3005-3011.
[22]宋飞,张建民.考虑侧向变形的各向异性砂土土压力试验研究[J].岩石力学与工程学报,2009,1884-1895.
[23]宋飞,张建民,刘超.各向异性砂土K0试验研究[J].岩土力学,2010.12(待发表).
[24]宋飞,张建民.各向异性砂土主动侧土压力计算方法[J].岩土力学,2011(待发表).
[25]Song Fei,Zhang Jian-min.Centrifuge modeling of active earth pressures[C]∥Proceedings of the 7th International Conference on Physical Mod-eling in Geotechnics,2010:505-509.
[26]Zhang JianMin,Song Fei,Li Deji.Effect of strain localization on seismic active earth pressure[J].Journal of Geotechnical and Geoenvironmen-tal Engineering,ASCE,2010,999-1003
[27]宋飞,张建民.超固结土的主动土压力求解方法[C]∥第二届全国岩土与工程大会会议论文集,2006:470-475.
[28]宋飞,张建民.水平层分析法求解超固结土的地震主动土压力[C]∥第七届全国土动力学会议论文集,2006:91-95.
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