Seismic Responses of Concrete Building Subjected to Out-of-phase Ground Motions
Seismic performance of a building is commonly evaluated by applying same design ground motions at each building foundation. However, local soil conditions beneath a building likely vary, and these variations could result in out-of-phased design ground motions at each of the foundation locations. In...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Petra Christian University
2023-09-01
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| Series: | Civil Engineering Dimension |
| Subjects: | |
| Online Access: | https://ced.petra.ac.id/index.php/civ/article/view/26146 |
| Summary: | Seismic performance of a building is commonly evaluated by applying same design ground motions at each building foundation. However, local soil conditions beneath a building likely vary, and these variations could result in out-of-phased design ground motions at each of the foundation locations. In this study, building’s responses during earthquakes were analyzed and compared using same and out-of-phase ground motions. The building is 10-story, 90m-wide, reinforced concrete structure supported on isolated footings with tie beams. Dynamic time response analyses were performed using five earthquake records which were scaled to a design response spectrum for a location in Surabaya. Seismic modification factor, R, of 8 was used. The results indicate that the use of out-of-phase ground motions does not have significant impacts on building inter-story drifts; it results, however in significantly higher column base shears and tie beam axial forces compared to those calculated using same ground motions.
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| ISSN: | 1410-9530 1979-570X |