桩-土-结构相互作用对桩基组合结构振动控制的影响研究

Influence of pile-soil-structure interaction on vibration control of a double-parts combined piling structures

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.