Observed Seismic Behavior of a HDRB and SD Isolation System under Far Fault Earthquakes
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 dista...
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Published in | Infrastructures (Basel) Vol. 7; no. 2; p. 13 |
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Format | Journal Article |
Language | English |
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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. |
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AbstractList | 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. |
Author | Salvatori, Antonello Bongiovanni, Giovanni Saitta, Fernando Ormando, Chiara Clemente, Paolo Scafati, Federico |
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Cites_doi | 10.1061/(ASCE)0733-9445(2000)126:10(1177) 10.1002/stc.2331 10.1061/(ASCE)CF.1943-5509.0001589 10.1007/978-3-319-07118-3_14 10.1002/stc.479 10.1016/j.soildyn.2018.12.018 10.1016/j.soildyn.2017.12.003 10.1002/9780470172742 10.37153/2686-7974-2019-16-111-122 10.1155/2018/1569683 10.1061/(ASCE)SC.1943-5576.0000547 10.2140/siaps.2010.1.17 10.1061/(ASCE)SC.1943-5576.0000580 10.1002/(SICI)1099-1794(199606)5:2<95::AID-TAL71>3.0.CO;2-7 10.1007/978-3-030-13976-6 10.1016/j.soildyn.2017.12.029 10.1201/b21889 10.1007/s13349-021-00539-z 10.1007/s13349-017-0219-6 10.1002/stc.1661 10.1061/(ASCE)CF.1943-5509.0000948 10.1061/(ASCE)0733-9445(2001)127:9(1063) |
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Copyright | 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. |
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SubjectTerms | base isolation Concrete Concrete construction Damping Decoupling Earthquakes experimental seismic behavior Finite element method Friction high damping rubber bearings Mathematical models Reinforced concrete Rubber seismic monitoring Seismic response seismically isolated buildings Shear strain Sliding Superstructures Vibration analysis |
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Title | Observed Seismic Behavior of a HDRB and SD Isolation System under Far Fault Earthquakes |
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