Dynamic characteristics and aseismic performance of a new mega-substructure energy-dissipating control system

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (3) : 187-194.

LI Xiangxiu1, LIU Aiwen1, LIU Liangkun2, LI Xiaojun1,3

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Abstract

Due to rotation inertia damper (PID) having a small physical mass and providing a larger damping force, it was proposed to be used in mega-structure systems to form a new RID-mega-substructure energy-dissipating control system. The vibration differential equation of the new RID-mega-substructure energy-dissipating control system was established to analyze the influence law of RID parameters including equivalent mass and equivalent damping coefficient on dynamic characteristics of the new system. Then, the aseismic performance of the new system was studied from two aspects of structural time history response and random response. The study results showed that RID parameters can have different effects on natural frequencies and damping ratios of the new system; compared with a mega-substructure aseismic system, the new RID-mega-substructure energy-dissipating control system can effectively reduce seismic responses of a structural system under earthquake; the results can provide suggestions for aseismic design of mega-structure systems.

Key words

mega-substructure control system / rotation inertia damper (PID) / dynamic characteristics / aseismic performance

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LI Xiangxiu1, LIU Aiwen1, LIU Liangkun2, LI Xiaojun1,3. Dynamic characteristics and aseismic performance of a new mega-substructure energy-dissipating control system[J]. Journal of Vibration and Shock, 2021, 40(3): 187-194

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