This paper illustrates the results of an experimental campaign performed on a scale prototype of a base dissipator called Mini Tribological ROCKing Seismic Isolation Device. This device allows a smooth, controlled and damped rocking by means of frictional layers and viscous elastic springs, which aim at decoupling the frequencies of the superstructure, at dissipating energy during motion and at re-centering the system once the external action vanishes. Four superstructures are tested–a shear type frame, braced and unbraced, a multi-story frame and a SDOF oscillator–with 96 ambient vibration and impulsive tests. An analytical model is illustrated and validated by the experimental tests. The reduction of relative displacement demand is analyzed for all the cases together with the reduction of the acceleration demand, showing positive effects of the base dissipator on the dynamic behavior of all the superstructures.

Experimental and numerical investigation on a passive control system for the mitigation of vibrations on SDOF and MDOF Structures: mini Tribological ROCKing Seismic Isolation Device (miniTROCKSISD) / Giresini, L.; Puppio, M. L.; Laccone, F.; Froli, M.. - In: JOURNAL OF EARTHQUAKE ENGINEERING. - ISSN 1363-2469. - (2021), pp. 1-19. [10.1080/13632469.2021.1964646]

Experimental and numerical investigation on a passive control system for the mitigation of vibrations on SDOF and MDOF Structures: mini Tribological ROCKing Seismic Isolation Device (miniTROCKSISD)

Giresini L.
Primo
;
2021

Abstract

This paper illustrates the results of an experimental campaign performed on a scale prototype of a base dissipator called Mini Tribological ROCKing Seismic Isolation Device. This device allows a smooth, controlled and damped rocking by means of frictional layers and viscous elastic springs, which aim at decoupling the frequencies of the superstructure, at dissipating energy during motion and at re-centering the system once the external action vanishes. Four superstructures are tested–a shear type frame, braced and unbraced, a multi-story frame and a SDOF oscillator–with 96 ambient vibration and impulsive tests. An analytical model is illustrated and validated by the experimental tests. The reduction of relative displacement demand is analyzed for all the cases together with the reduction of the acceleration demand, showing positive effects of the base dissipator on the dynamic behavior of all the superstructures.
2021
base isolation; Damage avoidance design; friction; rocking; seismic protection; vibration control
01 Pubblicazione su rivista::01a Articolo in rivista
Experimental and numerical investigation on a passive control system for the mitigation of vibrations on SDOF and MDOF Structures: mini Tribological ROCKing Seismic Isolation Device (miniTROCKSISD) / Giresini, L.; Puppio, M. L.; Laccone, F.; Froli, M.. - In: JOURNAL OF EARTHQUAKE ENGINEERING. - ISSN 1363-2469. - (2021), pp. 1-19. [10.1080/13632469.2021.1964646]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1636327
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