桩-土-结构相互作用对桩基组合结构振动控制的影响研究
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摘要
提出了一种新的混合振动控制体系——组合桩基结构体系,推导了其考虑桩-土-结构相互作用(PSSI)的振动及控制方程,并分析了PSSI对组合桩基结构的振动控制影响,以及土与结构各种主要参数对控制效果的影响。分析结果表明:PSSI对桩基结构及联接体的位移响应影响较小,对加速度响应影响较大;当桩周土的等效剪切波速小于700 m/s,组合桩基结构的振动控制应该考虑PSSI的影响;过分增大桩的截面惯性矩对振动控制的影响不大;桩基结构的上部质量对体系的振动控制影响较大,主要表现为:质量越大PSSI对联接体的加速度影响越大。
A new pattern of hybrid vibration-control system for combined piling structures is presented,with its vibration and control equation derived in consideration of the pile-soil-structure interaction(PSSI).PSSI's effects on structural vibration control is analyzed.The effects of every parameter of soil and structures on structural vibration control are studied.The conclusions suggest that: PSSI influence the displacement responds relatively small and influence the acceleration responds relatively larger;If the shear wave velocity is less than 700 m/s,PSSI should be considered in vibration control of combined piling structures,much larger pile moment of inertia has little effect on the vibration control;The upper mass of the combined piling structures has greater effect on the vibration control.The greater mass,the greater influence of PSSI on the acceleration of connection structures.
A new pattern of hybrid vibration-control system for combined piling structures is presented,with its vibration and control equation derived in consideration of the pile-soil-structure interaction(PSSI).PSSI's effects on structural vibration control is analyzed.The effects of every parameter of soil and structures on structural vibration control are studied.The conclusions suggest that: PSSI influence the displacement responds relatively small and influence the acceleration responds relatively larger;If the shear wave velocity is less than 700 m/s,PSSI should be considered in vibration control of combined piling structures,much larger pile moment of inertia has little effect on the vibration control;The upper mass of the combined piling structures has greater effect on the vibration control.The greater mass,the greater influence of PSSI on the acceleration of connection structures.
引文
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[9]李永梅,孙国富,王松涛,等.桩-土-杆系结构的动力相互作用[J].建筑结构学报,2002,23(1):75—81.
[10]欧进萍.结构振动控制——主动、半主动和智能控制[M].北京:科学出版社,2003.
[2]邹立华,赵人达.组合隔震结构的振动控制研究[J].振动与冲击,2005,24(2):80—83.
[3]亓兴军,李小军,李亚琦.桩-土动力相互作用对连续梁桥半主动控制的影响研究[J].振动与冲击,2006,25(5):81—84.
[4]Klein R E,Cusano C,Stukel J.Investigation of amethod to stabilize wind induced oscillations in largestructures[A].Present at 1972 ASME Winter AnnualMeeting[C].1972,New York,Paper No.72-WA/AUT-H.
[5]邹立华,赵人达,赵建昌.多单体组合结构混合振动控制研究[J].铁道学报,2005,27(3):80—84.
[6]Zhu H P,Iemura H.A study of response control onthe passive coupling elment between two parallelstructures[J].International Journal of StructuralEngineering and Mechanics,2000,9(4):383—396.
[7]Zhu H P,Iemura H.A study on interaction control forseismic response of parallel structures[J].Computersand Structures.2001,79(2):231—242.
[8]Xu Y L,He Q,Ko J M.Dynamic response of damper-connected adjacent buildings under earthquakeexcitation[J].Engineering Structures,1999,21:135—148.
[9]李永梅,孙国富,王松涛,等.桩-土-杆系结构的动力相互作用[J].建筑结构学报,2002,23(1):75—81.
[10]欧进萍.结构振动控制——主动、半主动和智能控制[M].北京:科学出版社,2003.
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