Seismic Response of RC Frames with a Soft First Story Retrofitted with Hysteretic Dampers under Near-Fault Earthquakes
Reinforced concrete (RC) frame structures with open first stories and masonry infill walls at the upper stories are very common in seismic areas. Under strong earthquakes, most of the energy dissipation demand imposed by the earthquake concentrates in the first story, and this eventually leads the b...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-02-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/11/3/1290 |
| _version_ | 1797417280493060096 |
|---|---|
| author | Santiago Mota-Páez David Escolano-Margarit Amadeo Benavent-Climent |
| author_facet | Santiago Mota-Páez David Escolano-Margarit Amadeo Benavent-Climent |
| author_sort | Santiago Mota-Páez |
| collection | DOAJ |
| description | Reinforced concrete (RC) frame structures with open first stories and masonry infill walls at the upper stories are very common in seismic areas. Under strong earthquakes, most of the energy dissipation demand imposed by the earthquake concentrates in the first story, and this eventually leads the building to collapse. A very efficient and cost-effective solution for the seismic upgrading of this type of structure consists of installing hysteretic dampers in the first story. This paper investigates the response of RC soft-story frames retrofitted with hysteretic dampers subjected to near-fault ground motions in terms of maximum displacements and lateral seismic forces and compares them with those obtained by far-field earthquakes. It is found that for similar levels of total seismic input energy, the maximum displacements in the first story caused by near-fault earthquakes are about 1.3 times larger than those under far-field earthquakes, while the maximum inter-story drift in the upper stories and the distribution and values of the lateral forces are scarcely affected. It is concluded that the maximum displacements can be easily predicted from the energy balance of the structure by using appropriate values for the parameter that reflects the influence of the impulsivity of the ground motion: the so-called equivalent number of cycles. |
| first_indexed | 2024-03-09T06:16:24Z |
| format | Article |
| id | doaj.art-2daeabe0c05d413c85423544a6e4b7af |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T06:16:24Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-2daeabe0c05d413c85423544a6e4b7af2023-12-03T11:52:04ZengMDPI AGApplied Sciences2076-34172021-02-01113129010.3390/app11031290Seismic Response of RC Frames with a Soft First Story Retrofitted with Hysteretic Dampers under Near-Fault EarthquakesSantiago Mota-Páez0David Escolano-Margarit1Amadeo Benavent-Climent2Department of Civil Engineering, Universidad Tecnológica del Cibao Oriental, Cotuí 43000, Dominican RepublicDepartment of Mechanical Engineering, Universidad Politécnica de Madrid, 28006 Madrid, SpainDepartment of Mechanical Engineering, Universidad Politécnica de Madrid, 28006 Madrid, SpainReinforced concrete (RC) frame structures with open first stories and masonry infill walls at the upper stories are very common in seismic areas. Under strong earthquakes, most of the energy dissipation demand imposed by the earthquake concentrates in the first story, and this eventually leads the building to collapse. A very efficient and cost-effective solution for the seismic upgrading of this type of structure consists of installing hysteretic dampers in the first story. This paper investigates the response of RC soft-story frames retrofitted with hysteretic dampers subjected to near-fault ground motions in terms of maximum displacements and lateral seismic forces and compares them with those obtained by far-field earthquakes. It is found that for similar levels of total seismic input energy, the maximum displacements in the first story caused by near-fault earthquakes are about 1.3 times larger than those under far-field earthquakes, while the maximum inter-story drift in the upper stories and the distribution and values of the lateral forces are scarcely affected. It is concluded that the maximum displacements can be easily predicted from the energy balance of the structure by using appropriate values for the parameter that reflects the influence of the impulsivity of the ground motion: the so-called equivalent number of cycles.https://www.mdpi.com/2076-3417/11/3/1290energy dissipation devicesenergy-based designmetallic dampernear-fault earthquakesoft story |
| spellingShingle | Santiago Mota-Páez David Escolano-Margarit Amadeo Benavent-Climent Seismic Response of RC Frames with a Soft First Story Retrofitted with Hysteretic Dampers under Near-Fault Earthquakes Applied Sciences energy dissipation devices energy-based design metallic damper near-fault earthquake soft story |
| title | Seismic Response of RC Frames with a Soft First Story Retrofitted with Hysteretic Dampers under Near-Fault Earthquakes |
| title_full | Seismic Response of RC Frames with a Soft First Story Retrofitted with Hysteretic Dampers under Near-Fault Earthquakes |
| title_fullStr | Seismic Response of RC Frames with a Soft First Story Retrofitted with Hysteretic Dampers under Near-Fault Earthquakes |
| title_full_unstemmed | Seismic Response of RC Frames with a Soft First Story Retrofitted with Hysteretic Dampers under Near-Fault Earthquakes |
| title_short | Seismic Response of RC Frames with a Soft First Story Retrofitted with Hysteretic Dampers under Near-Fault Earthquakes |
| title_sort | seismic response of rc frames with a soft first story retrofitted with hysteretic dampers under near fault earthquakes |
| topic | energy dissipation devices energy-based design metallic damper near-fault earthquake soft story |
| url | https://www.mdpi.com/2076-3417/11/3/1290 |
| work_keys_str_mv | AT santiagomotapaez seismicresponseofrcframeswithasoftfirststoryretrofittedwithhystereticdampersundernearfaultearthquakes AT davidescolanomargarit seismicresponseofrcframeswithasoftfirststoryretrofittedwithhystereticdampersundernearfaultearthquakes AT amadeobenaventcliment seismicresponseofrcframeswithasoftfirststoryretrofittedwithhystereticdampersundernearfaultearthquakes |