Seismic Performance of Different Triple Friction Pendulum Isolation Structures under Near-Fault Ground Motion
In order to study the isolation effect of triple friction pendulum isolation bearing with different isolation structures under near-fault ground motion,based on the analysis of SAP2000 finite element software,a high-rise building structure model is established.By inputting near-fault seismic waves,the seismic responses of triple fric-tion pendulum base-isolated,double-layer isolated and combined isolated structures under near-fault ground motions are analyzed and compared.The results show that the three isolation methods can prolong the natural vibration peri-od of the structure,the period ratio of the double-layer isolation structure is the smallest,and the torsion effect of the structure is the best.The time history curve of triple friction pendulum foundation and double layer isolation will produce"rebound"effect at the end of seismic excitation,and the combined isolation structure greatly reduces the"rebound"effect,and the viscous damper can help the triple friction pendulum isolation bearing and the building i t self consume part of the seismic energy.
near-fault ground motionviscous dampertime history curveenergy curve
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