The behavior of a reinforced concrete building, seismically isolated with high damping rubber bearing (HDRB) and sliding devices (SD), observed during the most important events of the seismic sequence that struck central Italy from August 2016 to January 2017, is analyzed. Due to the epicenter distances, all the events had light effects at the site, thus the isolation system was not always put into action. A previous very low energy earthquake and the ambient vibration analysis are used for comparison. The study of the isolation system response is first carried out and the variability of the resonance frequencies with the input energy at the site is pointed out. These frequencies are quite close to those of the superstructure considered as fixed base. Small cracks were observed after the sequence in some partition walls of the building. The analysis of the superstructure was performed by means of a finite element model, assuming a non-linear model for the isolators, based on previous experimental data. The importance of a suitable decoupling between the superstructure and the ground and the contribution of the sliding devices under low energy earthquake is pointed out.

Salvatori, A., Bongiovanni, G., Clemente, P., Ormando, C., Saitta, F., Scafati, F. (2022). Observed Seismic Behavior of a HDRB and SD Isolation System under Far Fault Earthquakes. INFRASTRUCTURES, 7(2) [10.3390/infrastructures7020013].

Observed Seismic Behavior of a HDRB and SD Isolation System under Far Fault Earthquakes

Ormando C.;
2022-01-01

Abstract

The behavior of a reinforced concrete building, seismically isolated with high damping rubber bearing (HDRB) and sliding devices (SD), observed during the most important events of the seismic sequence that struck central Italy from August 2016 to January 2017, is analyzed. Due to the epicenter distances, all the events had light effects at the site, thus the isolation system was not always put into action. A previous very low energy earthquake and the ambient vibration analysis are used for comparison. The study of the isolation system response is first carried out and the variability of the resonance frequencies with the input energy at the site is pointed out. These frequencies are quite close to those of the superstructure considered as fixed base. Small cracks were observed after the sequence in some partition walls of the building. The analysis of the superstructure was performed by means of a finite element model, assuming a non-linear model for the isolators, based on previous experimental data. The importance of a suitable decoupling between the superstructure and the ground and the contribution of the sliding devices under low energy earthquake is pointed out.
2022
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore ICAR/09
English
Base isolation
Experimental seismic behavior
High damping rubber bearings
Seismic monitoring
Seismically isolated buildings
Salvatori, A., Bongiovanni, G., Clemente, P., Ormando, C., Saitta, F., Scafati, F. (2022). Observed Seismic Behavior of a HDRB and SD Isolation System under Far Fault Earthquakes. INFRASTRUCTURES, 7(2) [10.3390/infrastructures7020013].
Salvatori, A; Bongiovanni, G; Clemente, P; Ormando, C; Saitta, F; Scafati, F
Articolo su rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/369246
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