Effect of Elevated Temperatures on Mechanical Properties of Spliced and Non-Spliced Steel Reinforcements: Experimental Study
Steel reinforcement is an essential part of reinforced concrete, providing structural strength. In case of fire, the steel reinforcement severely loses its mechanical properties, leading to structural collapse in some elevated temperatures. Thus, this work mainly investigates the mechanical properti...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/6/1419 |
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| author | Chanachai Thongchom Suphanut Kongwat Jongchai Jaitrong Suraparb Keawsawasvong Linh Van Hong Bui Boonchai Stitmannaithum Saeed Mousa |
| author_facet | Chanachai Thongchom Suphanut Kongwat Jongchai Jaitrong Suraparb Keawsawasvong Linh Van Hong Bui Boonchai Stitmannaithum Saeed Mousa |
| author_sort | Chanachai Thongchom |
| collection | DOAJ |
| description | Steel reinforcement is an essential part of reinforced concrete, providing structural strength. In case of fire, the steel reinforcement severely loses its mechanical properties, leading to structural collapse in some elevated temperatures. Thus, this work mainly investigates the mechanical properties of spliced and non-spliced steel reinforcements after being exposed to 500 °C, 700 °C, and 900 °C. The results show that the mechanical properties of steel reinforcements significantly change after exposure to temperatures exceeding 500 °C, and the diameter of steel reinforcements does not considerably affect post-fire properties. The proposed equations from previous work were also compared to the testing results in terms of post-fire stress–strain curves and mechanical properties, resulting in overestimation at temperatures of 700 °C and 900 °C. The study finds that using a mechanical coupler has the potential to increase the residual yield strength at a temperature of 500 °C, but it lacks post-fire elongation at a temperature of 700 °C due to observed failure behavior after testing. Furthermore, the failure occurred at the mechanical couplers when the exposure temperature reached 700 °C. The modulus of elasticity of non-splices was the most critical parameter, which was maximally different by 23.9% compared to non-spliced steel reinforcements. |
| first_indexed | 2024-03-11T02:40:23Z |
| format | Article |
| id | doaj.art-0c846543eda0464aa5dcd28aac41f81b |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-11T02:40:23Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-0c846543eda0464aa5dcd28aac41f81b2023-11-18T09:38:01ZengMDPI AGBuildings2075-53092023-05-01136141910.3390/buildings13061419Effect of Elevated Temperatures on Mechanical Properties of Spliced and Non-Spliced Steel Reinforcements: Experimental StudyChanachai Thongchom0Suphanut Kongwat1Jongchai Jaitrong2Suraparb Keawsawasvong3Linh Van Hong Bui4Boonchai Stitmannaithum5Saeed Mousa6Research Unit in Structural and Foundation Engineering, Department of Civil Engineering, Thammasat School of Engineering, Faculty of Engineering, Thammasat University, Pathumthani 12120, ThailandDepartment of Mechanical Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, Bangkok 10140, ThailandResearch Unit in Structural and Foundation Engineering, Department of Civil Engineering, Thammasat School of Engineering, Faculty of Engineering, Thammasat University, Pathumthani 12120, ThailandResearch Unit in Structural and Foundation Engineering, Department of Civil Engineering, Thammasat School of Engineering, Faculty of Engineering, Thammasat University, Pathumthani 12120, ThailandAdvanced Retrofit Technology International Center, Advanced Research Laboratories, Tokyo City University, Tokyo 158-8557, JapanCenter of Excellence in Innovative Construction Materials, Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, ThailandFaculty of Engineering, Jazan University, Jazan 88082, Saudi ArabiaSteel reinforcement is an essential part of reinforced concrete, providing structural strength. In case of fire, the steel reinforcement severely loses its mechanical properties, leading to structural collapse in some elevated temperatures. Thus, this work mainly investigates the mechanical properties of spliced and non-spliced steel reinforcements after being exposed to 500 °C, 700 °C, and 900 °C. The results show that the mechanical properties of steel reinforcements significantly change after exposure to temperatures exceeding 500 °C, and the diameter of steel reinforcements does not considerably affect post-fire properties. The proposed equations from previous work were also compared to the testing results in terms of post-fire stress–strain curves and mechanical properties, resulting in overestimation at temperatures of 700 °C and 900 °C. The study finds that using a mechanical coupler has the potential to increase the residual yield strength at a temperature of 500 °C, but it lacks post-fire elongation at a temperature of 700 °C due to observed failure behavior after testing. Furthermore, the failure occurred at the mechanical couplers when the exposure temperature reached 700 °C. The modulus of elasticity of non-splices was the most critical parameter, which was maximally different by 23.9% compared to non-spliced steel reinforcements.https://www.mdpi.com/2075-5309/13/6/1419post-fire strengththreaded mechanical couplersreinforcement splicesresidual strengthexposed temperaturesteel reinforcement |
| spellingShingle | Chanachai Thongchom Suphanut Kongwat Jongchai Jaitrong Suraparb Keawsawasvong Linh Van Hong Bui Boonchai Stitmannaithum Saeed Mousa Effect of Elevated Temperatures on Mechanical Properties of Spliced and Non-Spliced Steel Reinforcements: Experimental Study Buildings post-fire strength threaded mechanical couplers reinforcement splices residual strength exposed temperature steel reinforcement |
| title | Effect of Elevated Temperatures on Mechanical Properties of Spliced and Non-Spliced Steel Reinforcements: Experimental Study |
| title_full | Effect of Elevated Temperatures on Mechanical Properties of Spliced and Non-Spliced Steel Reinforcements: Experimental Study |
| title_fullStr | Effect of Elevated Temperatures on Mechanical Properties of Spliced and Non-Spliced Steel Reinforcements: Experimental Study |
| title_full_unstemmed | Effect of Elevated Temperatures on Mechanical Properties of Spliced and Non-Spliced Steel Reinforcements: Experimental Study |
| title_short | Effect of Elevated Temperatures on Mechanical Properties of Spliced and Non-Spliced Steel Reinforcements: Experimental Study |
| title_sort | effect of elevated temperatures on mechanical properties of spliced and non spliced steel reinforcements experimental study |
| topic | post-fire strength threaded mechanical couplers reinforcement splices residual strength exposed temperature steel reinforcement |
| url | https://www.mdpi.com/2075-5309/13/6/1419 |
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