【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。更多还原

【Abstract】 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.更多还原