双层地基中瑞利波引起的桩土竖向共同作用
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摘要
利用文克尔地基模型 ,考虑桩底支承条件 ,研究了双层地基在瑞利波作用下桩土竖向共同作用 ,探讨了下卧层剪切波速、频率、桩土模量比及桩底支承条件对桩竖向位移和应力的影响 ,成果对桩基工程抗震设计有指导意义
An analytical solution is presented to calculate the vertical single pile response in two layered soil when excited by the passage of Rayleigh seismic waves. The results are obtained through a widely used dynamic Winkler model, with realistic frequency dependent ‘springs’ and ‘dashpots’. It is shown that the frequency, velocity of shear waves, boundary conditions are of great influence on vertical displacement and strain of a single pile.
An analytical solution is presented to calculate the vertical single pile response in two layered soil when excited by the passage of Rayleigh seismic waves. The results are obtained through a widely used dynamic Winkler model, with realistic frequency dependent ‘springs’ and ‘dashpots’. It is shown that the frequency, velocity of shear waves, boundary conditions are of great influence on vertical displacement and strain of a single pile.
引文
1 Nicos Makris. Soil- pile interaction during the passage of Rayleigh waves:an analytical solution.Earthquake Engr.Struct.Dyn.,1 994;2 3;1 53— 1 67
2 Blaney G W,Kausel E,Rosset JM.Dynamic stiffness of piles.In:Proc. 2 nd Int.Conf.Nuner.Methods Geomechanics.Blackburg,Virginia,1 976;1 0 0 1— 1 0 1 2
3 Makris N,Gatetas G.Dynamic pile- soil- pile interaction.Part :lateral and seismic response.Earthquake Engr.Struct.Dyn.,1 992 ;2 1 :1 45— 1 62
4 Kania A M,Novak M.Response of pile foundations to Rayleigh waves and to obliquely incident bodywaves.Earthquake Engr.Struct.Dyn.,1 992 ;2 1 :30 3— 31 8
5 Rosset JM,Angelides D.Dynmaic stiffness of piles.In Numerical Methods in Offshore Piling,ICE,London,England 1 981 ;75— 81
6 Novak M.Dynamic stiffness and damping of piles.Canadian Geotech.,1 974;1 1 :574— 598
7 Lysmer J,Richart F E.Dynamic response of footing to vertical loading.J.Soil Mech.Fdn EngngDiv.Am.Soc.Civ.Engrs.92 ,1 966:SMI.65— 91
8 吴世明 .土介质中的波 .北京 :科学教育出版社 ,1 997
9 王立忠、柯 瀚等 .地震荷载作用下水泥搅拌桩的动力响应 .振动工程学报 ,1 998;1 1 (4) :41 6— 42 3
2 Blaney G W,Kausel E,Rosset JM.Dynamic stiffness of piles.In:Proc. 2 nd Int.Conf.Nuner.Methods Geomechanics.Blackburg,Virginia,1 976;1 0 0 1— 1 0 1 2
3 Makris N,Gatetas G.Dynamic pile- soil- pile interaction.Part :lateral and seismic response.Earthquake Engr.Struct.Dyn.,1 992 ;2 1 :1 45— 1 62
4 Kania A M,Novak M.Response of pile foundations to Rayleigh waves and to obliquely incident bodywaves.Earthquake Engr.Struct.Dyn.,1 992 ;2 1 :30 3— 31 8
5 Rosset JM,Angelides D.Dynmaic stiffness of piles.In Numerical Methods in Offshore Piling,ICE,London,England 1 981 ;75— 81
6 Novak M.Dynamic stiffness and damping of piles.Canadian Geotech.,1 974;1 1 :574— 598
7 Lysmer J,Richart F E.Dynamic response of footing to vertical loading.J.Soil Mech.Fdn EngngDiv.Am.Soc.Civ.Engrs.92 ,1 966:SMI.65— 91
8 吴世明 .土介质中的波 .北京 :科学教育出版社 ,1 997
9 王立忠、柯 瀚等 .地震荷载作用下水泥搅拌桩的动力响应 .振动工程学报 ,1 998;1 1 (4) :41 6— 42 3
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