The Experimental and Theoretical Effect of Fire on the Structural Behavior of Laced Reinforced Concrete Deep Beams
A Laced Reinforced Concrete (LRC) structural element comprises continuously inclined shear reinforcement in the form of lacing that connects the longitudinal reinforcements on both faces of the structural element. This study conducted a theoretical investigation of LRC deep beams to predict their b...
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| Format: | Article |
| Language: | English |
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D. G. Pylarinos
2023-10-01
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| Series: | Engineering, Technology & Applied Science Research |
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| Online Access: | http://www.etasr.com/index.php/ETASR/article/view/6272 |
| _version_ | 1797660059907391488 |
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| author | Abbas Kareem Shatha D. Mohammed |
| author_facet | Abbas Kareem Shatha D. Mohammed |
| author_sort | Abbas Kareem |
| collection | DOAJ |
| description |
A Laced Reinforced Concrete (LRC) structural element comprises continuously inclined shear reinforcement in the form of lacing that connects the longitudinal reinforcements on both faces of the structural element. This study conducted a theoretical investigation of LRC deep beams to predict their behavior after exposure to fire and high temperatures. Four simply supported reinforced concrete beams of 1500 mm, 200 mm, and 240 mm length, width, and depth, respectively, were considered. The specimens were identical in terms of compressive strength ( 40 MPa) and steel reinforcement details. The same laced steel reinforcement ratio of 0.0035 was used. Three specimens were burned at variable durations and steady-state temperatures (one hour at 500 °C and 600 °C, and two hours at 500 °C). The flexural behavior of the simply supported deep beams, subjected to the two concentric loads in the middle third of the beam, was investigated with ABAQUS software. The results showed that the laced reinforcement with an inclination of 45˚ improved the structural behavior of the deep beams, and the lacing resisted failure and extended the life of the model. The optimal structural response was observed for the specimens. The laced reinforcement improved the failure mode and converted it from shear to flexure-shear failure. The parametric study showed that the lacing bars remarkably improved the strength of the deep beams and they were not affected more by the steady-state temperature and duration. Furthermore, a greater increase in load-carrying capacity was associated with an increase in the flexural diameter of approximately 12 and 16 mm by approximately 24.77% and 87.61%, respectively, compared to the reference LRC deep beams.
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| first_indexed | 2024-03-11T18:24:18Z |
| format | Article |
| id | doaj.art-ac47822a8a474268b1510199a52b5839 |
| institution | Directory Open Access Journal |
| issn | 2241-4487 1792-8036 |
| language | English |
| last_indexed | 2024-03-11T18:24:18Z |
| publishDate | 2023-10-01 |
| publisher | D. G. Pylarinos |
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| series | Engineering, Technology & Applied Science Research |
| spelling | doaj.art-ac47822a8a474268b1510199a52b58392023-10-14T05:47:02ZengD. G. PylarinosEngineering, Technology & Applied Science Research2241-44871792-80362023-10-0113510.48084/etasr.6272The Experimental and Theoretical Effect of Fire on the Structural Behavior of Laced Reinforced Concrete Deep BeamsAbbas Kareem0Shatha D. Mohammed 1Civil Engineering Department, College of Engineering, University of Baghdad, IraqCivil Engineering Department, College of Engineering, University of Baghdad, Iraq A Laced Reinforced Concrete (LRC) structural element comprises continuously inclined shear reinforcement in the form of lacing that connects the longitudinal reinforcements on both faces of the structural element. This study conducted a theoretical investigation of LRC deep beams to predict their behavior after exposure to fire and high temperatures. Four simply supported reinforced concrete beams of 1500 mm, 200 mm, and 240 mm length, width, and depth, respectively, were considered. The specimens were identical in terms of compressive strength ( 40 MPa) and steel reinforcement details. The same laced steel reinforcement ratio of 0.0035 was used. Three specimens were burned at variable durations and steady-state temperatures (one hour at 500 °C and 600 °C, and two hours at 500 °C). The flexural behavior of the simply supported deep beams, subjected to the two concentric loads in the middle third of the beam, was investigated with ABAQUS software. The results showed that the laced reinforcement with an inclination of 45˚ improved the structural behavior of the deep beams, and the lacing resisted failure and extended the life of the model. The optimal structural response was observed for the specimens. The laced reinforcement improved the failure mode and converted it from shear to flexure-shear failure. The parametric study showed that the lacing bars remarkably improved the strength of the deep beams and they were not affected more by the steady-state temperature and duration. Furthermore, a greater increase in load-carrying capacity was associated with an increase in the flexural diameter of approximately 12 and 16 mm by approximately 24.77% and 87.61%, respectively, compared to the reference LRC deep beams. http://www.etasr.com/index.php/ETASR/article/view/6272laced reinforcement concretefinite element methodself-compacting concretefirehigh temperaturedeep beam |
| spellingShingle | Abbas Kareem Shatha D. Mohammed The Experimental and Theoretical Effect of Fire on the Structural Behavior of Laced Reinforced Concrete Deep Beams Engineering, Technology & Applied Science Research laced reinforcement concrete finite element method self-compacting concrete fire high temperature deep beam |
| title | The Experimental and Theoretical Effect of Fire on the Structural Behavior of Laced Reinforced Concrete Deep Beams |
| title_full | The Experimental and Theoretical Effect of Fire on the Structural Behavior of Laced Reinforced Concrete Deep Beams |
| title_fullStr | The Experimental and Theoretical Effect of Fire on the Structural Behavior of Laced Reinforced Concrete Deep Beams |
| title_full_unstemmed | The Experimental and Theoretical Effect of Fire on the Structural Behavior of Laced Reinforced Concrete Deep Beams |
| title_short | The Experimental and Theoretical Effect of Fire on the Structural Behavior of Laced Reinforced Concrete Deep Beams |
| title_sort | experimental and theoretical effect of fire on the structural behavior of laced reinforced concrete deep beams |
| topic | laced reinforcement concrete finite element method self-compacting concrete fire high temperature deep beam |
| url | http://www.etasr.com/index.php/ETASR/article/view/6272 |
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