Influence of the angle of seismic incidence of long-period pulse-like ground motion on an irregular base-isolated building
In general, isolators and dampers used in seismically isolated buildings are designed to be isotropic in any horizontal direction. However, in the case of buildings with plan irregularities, their nonlinear responses depend on the direction of seismic loading. To discuss the influence of the angle o...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-10-01
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| Series: | Frontiers in Built Environment |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fbuil.2022.1034166/full |
| _version_ | 1817985583476113408 |
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| author | Kenji Fujii |
| author_facet | Kenji Fujii |
| author_sort | Kenji Fujii |
| collection | DOAJ |
| description | In general, isolators and dampers used in seismically isolated buildings are designed to be isotropic in any horizontal direction. However, in the case of buildings with plan irregularities, their nonlinear responses depend on the direction of seismic loading. To discuss the influence of the angle of seismic incidence (ASI) on the nonlinear response of irregular building structures, it is important to define the angle of the critical axis of the horizontal ground motion. One possible choice is the “principal axis of ground motion” proposed by Arias (A measurement of earthquake intensity, 1970). However, because this principal axis is independent of the natural period of a structure, it could be complicated to use for seismically isolated structures with long natural periods. In this study, the influence of the ASI of long-period pulse-like seismic input on an irregular base-isolated building is investigated. First, the angle of the principal axis of ground motion is defined in terms of the cumulative energy input. Then, a nonlinear time-history analysis of a five-story irregular base-isolated building is performed using 10 long-period pulse-like ground motion records considering various ASIs. The results show that, compared with the principal axis of ground motion proposed by Arias, defining the principal axis of ground motion in terms of the cumulative energy input is more suitable for discussions concerning the influence of the ASI on the response of an irregular base-isolated building. |
| first_indexed | 2024-04-13T23:59:57Z |
| format | Article |
| id | doaj.art-12b86177263b4f418d03beba7b6f5dae |
| institution | Directory Open Access Journal |
| issn | 2297-3362 |
| language | English |
| last_indexed | 2024-04-13T23:59:57Z |
| publishDate | 2022-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Built Environment |
| spelling | doaj.art-12b86177263b4f418d03beba7b6f5dae2022-12-22T02:23:44ZengFrontiers Media S.A.Frontiers in Built Environment2297-33622022-10-01810.3389/fbuil.2022.10341661034166Influence of the angle of seismic incidence of long-period pulse-like ground motion on an irregular base-isolated buildingKenji FujiiIn general, isolators and dampers used in seismically isolated buildings are designed to be isotropic in any horizontal direction. However, in the case of buildings with plan irregularities, their nonlinear responses depend on the direction of seismic loading. To discuss the influence of the angle of seismic incidence (ASI) on the nonlinear response of irregular building structures, it is important to define the angle of the critical axis of the horizontal ground motion. One possible choice is the “principal axis of ground motion” proposed by Arias (A measurement of earthquake intensity, 1970). However, because this principal axis is independent of the natural period of a structure, it could be complicated to use for seismically isolated structures with long natural periods. In this study, the influence of the ASI of long-period pulse-like seismic input on an irregular base-isolated building is investigated. First, the angle of the principal axis of ground motion is defined in terms of the cumulative energy input. Then, a nonlinear time-history analysis of a five-story irregular base-isolated building is performed using 10 long-period pulse-like ground motion records considering various ASIs. The results show that, compared with the principal axis of ground motion proposed by Arias, defining the principal axis of ground motion in terms of the cumulative energy input is more suitable for discussions concerning the influence of the ASI on the response of an irregular base-isolated building.https://www.frontiersin.org/articles/10.3389/fbuil.2022.1034166/fullbase-isolated buildingirregularityangle of seismic incidencepulse-like ground motionenergy input |
| spellingShingle | Kenji Fujii Influence of the angle of seismic incidence of long-period pulse-like ground motion on an irregular base-isolated building Frontiers in Built Environment base-isolated building irregularity angle of seismic incidence pulse-like ground motion energy input |
| title | Influence of the angle of seismic incidence of long-period pulse-like ground motion on an irregular base-isolated building |
| title_full | Influence of the angle of seismic incidence of long-period pulse-like ground motion on an irregular base-isolated building |
| title_fullStr | Influence of the angle of seismic incidence of long-period pulse-like ground motion on an irregular base-isolated building |
| title_full_unstemmed | Influence of the angle of seismic incidence of long-period pulse-like ground motion on an irregular base-isolated building |
| title_short | Influence of the angle of seismic incidence of long-period pulse-like ground motion on an irregular base-isolated building |
| title_sort | influence of the angle of seismic incidence of long period pulse like ground motion on an irregular base isolated building |
| topic | base-isolated building irregularity angle of seismic incidence pulse-like ground motion energy input |
| url | https://www.frontiersin.org/articles/10.3389/fbuil.2022.1034166/full |
| work_keys_str_mv | AT kenjifujii influenceoftheangleofseismicincidenceoflongperiodpulselikegroundmotiononanirregularbaseisolatedbuilding |