Torsional Behavior of High-Strength Concrete Beams with Minimum Reinforcement Ratio
Although there is a growing trend to use higher strength for concrete and steel in reinforced concrete structures due to the lightness and slenderness of these members together with the simplified arrangement of their reinforcement, there is still the necessity to inspect the reduction of ductility...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/1432697 |
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| _version_ | 1832560948059045888 |
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| author | Changbin Joh Imjong Kwahk Jungwoo Lee In-Hwan Yang Byung-Suk Kim |
| author_facet | Changbin Joh Imjong Kwahk Jungwoo Lee In-Hwan Yang Byung-Suk Kim |
| author_sort | Changbin Joh |
| collection | DOAJ |
| description | Although there is a growing trend to use higher strength for concrete and steel in reinforced concrete structures due to the lightness and slenderness of these members together with the simplified arrangement of their reinforcement, there is still the necessity to inspect the reduction of ductility resulting from the gain in strength. Taking into account that this also concerns the design for torsion, this study intends to investigate the regulations related to the torsional minimum reinforcement ratio in view of the minimum ductility requirement with focus on Eurocode 2. To that goal, the relation between the torsional cracking moment and the ductile behavior is discussed for the beam reinforced with the minimum torsional reinforcement ratio to examine the eventual properness of the minimum torsional reinforcement ratio recommended by Eurocode 2. Moreover, a pure torsion test is performed on 18 beams made of 80 MPa concrete reinforced by high-strength bars with rectangular section and various test variables involving the minimum torsional reinforcement ratio, the transverse-to-longitudinal reinforcement ratio, and the total reinforcement ratio. As a result, for the high-strength concrete beams, the minimum torsional reinforcement ratio recommended by Eurocode 2 was insufficient to prevent the sudden loss of strength after the initiation of the torsional cracking. But with regard to the compatibility torsion of statically indeterminate structure, the adoption of the minimum torsional reinforcement ratio recommended by Eurocode 2 might secure enough deformability under displacement-controlled mode to allow the redistribution of the torsional moment. |
| format | Article |
| id | doaj-art-64ad9fc9830f4ce299e52a93544eebfe |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-64ad9fc9830f4ce299e52a93544eebfe2025-02-03T01:26:20ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/14326971432697Torsional Behavior of High-Strength Concrete Beams with Minimum Reinforcement RatioChangbin Joh0Imjong Kwahk1Jungwoo Lee2In-Hwan Yang3Byung-Suk Kim4Research Fellow, Korea Institute of Civil Engineering and Building Technology, Department of Infrastructure Safety Research, Goyang, Gyeonggi 10223, Republic of KoreaSenior Researcher, Korea Institute of Civil Engineering and Building Technology, Department of Infrastructure Safety Research, Goyang, Gyeonggi 10223, Republic of KoreaSenior Researcher, Korea Institute of Civil Engineering and Building Technology, Department of Infrastructure Safety Research, Goyang, Gyeonggi 10223, Republic of KoreaProfessor, Kunsan National University, Department of Civil Engineering, Kunsan, Jeonbuk 54150, Republic of KoreaSenior Research Fellow, Korea Institute of Civil Engineering and Building Technology, Department of Infrastructure Safety Research, Goyang, Gyeonggi 10223, Republic of KoreaAlthough there is a growing trend to use higher strength for concrete and steel in reinforced concrete structures due to the lightness and slenderness of these members together with the simplified arrangement of their reinforcement, there is still the necessity to inspect the reduction of ductility resulting from the gain in strength. Taking into account that this also concerns the design for torsion, this study intends to investigate the regulations related to the torsional minimum reinforcement ratio in view of the minimum ductility requirement with focus on Eurocode 2. To that goal, the relation between the torsional cracking moment and the ductile behavior is discussed for the beam reinforced with the minimum torsional reinforcement ratio to examine the eventual properness of the minimum torsional reinforcement ratio recommended by Eurocode 2. Moreover, a pure torsion test is performed on 18 beams made of 80 MPa concrete reinforced by high-strength bars with rectangular section and various test variables involving the minimum torsional reinforcement ratio, the transverse-to-longitudinal reinforcement ratio, and the total reinforcement ratio. As a result, for the high-strength concrete beams, the minimum torsional reinforcement ratio recommended by Eurocode 2 was insufficient to prevent the sudden loss of strength after the initiation of the torsional cracking. But with regard to the compatibility torsion of statically indeterminate structure, the adoption of the minimum torsional reinforcement ratio recommended by Eurocode 2 might secure enough deformability under displacement-controlled mode to allow the redistribution of the torsional moment.http://dx.doi.org/10.1155/2019/1432697 |
| spellingShingle | Changbin Joh Imjong Kwahk Jungwoo Lee In-Hwan Yang Byung-Suk Kim Torsional Behavior of High-Strength Concrete Beams with Minimum Reinforcement Ratio Advances in Civil Engineering |
| title | Torsional Behavior of High-Strength Concrete Beams with Minimum Reinforcement Ratio |
| title_full | Torsional Behavior of High-Strength Concrete Beams with Minimum Reinforcement Ratio |
| title_fullStr | Torsional Behavior of High-Strength Concrete Beams with Minimum Reinforcement Ratio |
| title_full_unstemmed | Torsional Behavior of High-Strength Concrete Beams with Minimum Reinforcement Ratio |
| title_short | Torsional Behavior of High-Strength Concrete Beams with Minimum Reinforcement Ratio |
| title_sort | torsional behavior of high strength concrete beams with minimum reinforcement ratio |
| url | http://dx.doi.org/10.1155/2019/1432697 |
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