Seismic Performance of Reinforced Concrete Non-Prismatic Columns
This paper investigates the potential enhancement of the seismic performance of reinforced concrete square columns by modifying their geometry from prismatic to non-prismatic, while maintaining the same volume. Two one-bay by two-bay three-story RC frames were simulated using ABAQUS software; the f...
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| Language: | English |
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University of Baghdad
2025-07-01
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| Series: | Journal of Engineering |
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| Online Access: | https://www.joe.uobaghdad.edu.iq/index.php/main/article/view/3564 |
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| author | Jabbar Abdalaali Kadhim Salah R. Al.Zaidee Hayder Amer Al-Baghdadi |
| author_facet | Jabbar Abdalaali Kadhim Salah R. Al.Zaidee Hayder Amer Al-Baghdadi |
| author_sort | Jabbar Abdalaali Kadhim |
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This paper investigates the potential enhancement of the seismic performance of reinforced concrete square columns by modifying their geometry from prismatic to non-prismatic, while maintaining the same volume. Two one-bay by two-bay three-story RC frames were simulated using ABAQUS software; the first has prismatic columns serving as the reference model, and the second has non-prismatic columns. Static lateral loads were applied to both frames after the application of gravity loads. Additionally, two one-bay by one-bay six-story RC buildings were modeled in ABAQUS; one has prismatic columns and the other has non-prismatic columns. These two models were subjected to the El Centro 0.32g NS 1940 earthquake, and time-history analyses were performed. The results showed that the seismic response, in terms of base shear capacity and stiffness, was significantly improved in the case of columns linearly tapered from a smaller cross-section at mid-height to a larger cross-section at the ends. For a tapering angle of 3.814°, the lateral strength increased by 56.4%, and the initial stiffness improved by 50.5%. Moreover, the overstrength factor of the RC frame with tapered columns increased by 56.48% compared to the prismatic-column reference model. The damage pattern in the frame with non-prismatic columns was also more favorable than that of the reference frame.
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| format | Article |
| id | doaj-art-0b7f17bb3d7e4428a4d450294a5d689a |
| institution | Kabale University |
| issn | 1726-4073 2520-3339 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | University of Baghdad |
| record_format | Article |
| series | Journal of Engineering |
| spelling | doaj-art-0b7f17bb3d7e4428a4d450294a5d689a2025-08-20T03:49:55ZengUniversity of BaghdadJournal of Engineering1726-40732520-33392025-07-0131710.31026/j.eng.2025.07.03Seismic Performance of Reinforced Concrete Non-Prismatic ColumnsJabbar Abdalaali Kadhim0Salah R. Al.Zaidee 1Hayder Amer Al-Baghdadi 2Department of Civil Engineering, College of Engineering, University of BaghdadDepartment of Civil Engineering, College of Engineering, University of BaghdadDepartment of Civil Engineering, College of Engineering, University of Baghdad This paper investigates the potential enhancement of the seismic performance of reinforced concrete square columns by modifying their geometry from prismatic to non-prismatic, while maintaining the same volume. Two one-bay by two-bay three-story RC frames were simulated using ABAQUS software; the first has prismatic columns serving as the reference model, and the second has non-prismatic columns. Static lateral loads were applied to both frames after the application of gravity loads. Additionally, two one-bay by one-bay six-story RC buildings were modeled in ABAQUS; one has prismatic columns and the other has non-prismatic columns. These two models were subjected to the El Centro 0.32g NS 1940 earthquake, and time-history analyses were performed. The results showed that the seismic response, in terms of base shear capacity and stiffness, was significantly improved in the case of columns linearly tapered from a smaller cross-section at mid-height to a larger cross-section at the ends. For a tapering angle of 3.814°, the lateral strength increased by 56.4%, and the initial stiffness improved by 50.5%. Moreover, the overstrength factor of the RC frame with tapered columns increased by 56.48% compared to the prismatic-column reference model. The damage pattern in the frame with non-prismatic columns was also more favorable than that of the reference frame. https://www.joe.uobaghdad.edu.iq/index.php/main/article/view/3564Non-prismaticReinforced concreteColumnsSeismicDamage |
| spellingShingle | Jabbar Abdalaali Kadhim Salah R. Al.Zaidee Hayder Amer Al-Baghdadi Seismic Performance of Reinforced Concrete Non-Prismatic Columns Journal of Engineering Non-prismatic Reinforced concrete Columns Seismic Damage |
| title | Seismic Performance of Reinforced Concrete Non-Prismatic Columns |
| title_full | Seismic Performance of Reinforced Concrete Non-Prismatic Columns |
| title_fullStr | Seismic Performance of Reinforced Concrete Non-Prismatic Columns |
| title_full_unstemmed | Seismic Performance of Reinforced Concrete Non-Prismatic Columns |
| title_short | Seismic Performance of Reinforced Concrete Non-Prismatic Columns |
| title_sort | seismic performance of reinforced concrete non prismatic columns |
| topic | Non-prismatic Reinforced concrete Columns Seismic Damage |
| url | https://www.joe.uobaghdad.edu.iq/index.php/main/article/view/3564 |
| work_keys_str_mv | AT jabbarabdalaalikadhim seismicperformanceofreinforcedconcretenonprismaticcolumns AT salahralzaidee seismicperformanceofreinforcedconcretenonprismaticcolumns AT hayderameralbaghdadi seismicperformanceofreinforcedconcretenonprismaticcolumns |