Practical Investigation on the Strengthening of the Built-Up Steel Main Girder of a Metro Station with Carbon-Fiber-Reinforced Polymer on the Inside Part of the Tensioned Flange
This study investigates the effectiveness of a carbon-fiber-reinforced polymer (CFRP) in enhancing the load-carrying capacity of a steel main girder in a metro station. The objective is to evaluate the applicability of CFRPs in sustaining increases in applied loads and assessing their effectiveness...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/7/1753 |
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| author | Mohamed A. M. A. Mahmoud Phan Viet Nhut Yukihiro Matsumoto |
| author_facet | Mohamed A. M. A. Mahmoud Phan Viet Nhut Yukihiro Matsumoto |
| author_sort | Mohamed A. M. A. Mahmoud |
| collection | DOAJ |
| description | This study investigates the effectiveness of a carbon-fiber-reinforced polymer (CFRP) in enhancing the load-carrying capacity of a steel main girder in a metro station. The objective is to evaluate the applicability of CFRPs in sustaining increases in applied loads and assessing their effectiveness on curved surfaces. Finite element analysis (FEA) identified the most stressed areas of the girder under design loads. Based on the FEA results, a targeted strengthening procedure using CFRP sheets was proposed. Various arrangements of CFRP sheets were tested, including different orientations and thicknesses up to 60% of the girder’s flange thickness. To validate the FEA accuracy, two small-scale specimen beams were prepared and tested in the laboratory. One beam was strengthened with CFRP sheets on the tension part of the inner flange side, similar to the suggested strengthening method for the girder. The FEA results show that the CFRP increases stresses by an average of 8% to 10% for the steel main girder, with strengthening effects up to 19% at the center of the CFRP strengthening positions, differing from a regular straight flange shape. Significantly reducing stresses required a total CFRP layer thickness of at least 50% of the flange’s total thickness. Applying a CFRP on the inner face of the girder preserves its usability without the need for openings in finishes or the metal deck surface. The findings highlight CFRP’s potential to enhance load-carrying capacity on curved surfaces and sustain increased applied loads, offering a promising solution for strengthening infrastructure and similar applications. |
| first_indexed | 2024-03-11T01:13:37Z |
| format | Article |
| id | doaj.art-67f856a08c94476984e0444e3fbd8b7f |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-11T01:13:37Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-67f856a08c94476984e0444e3fbd8b7f2023-11-18T18:38:25ZengMDPI AGBuildings2075-53092023-07-01137175310.3390/buildings13071753Practical Investigation on the Strengthening of the Built-Up Steel Main Girder of a Metro Station with Carbon-Fiber-Reinforced Polymer on the Inside Part of the Tensioned FlangeMohamed A. M. A. Mahmoud0Phan Viet Nhut1Yukihiro Matsumoto2Department of Architecture and Civil Engineering, Toyohashi University of Technology, Toyohashi 441-8580, JapanDepartment of Architecture and Civil Engineering, Toyohashi University of Technology, Toyohashi 441-8580, JapanDepartment of Architecture and Civil Engineering, Toyohashi University of Technology, Toyohashi 441-8580, JapanThis study investigates the effectiveness of a carbon-fiber-reinforced polymer (CFRP) in enhancing the load-carrying capacity of a steel main girder in a metro station. The objective is to evaluate the applicability of CFRPs in sustaining increases in applied loads and assessing their effectiveness on curved surfaces. Finite element analysis (FEA) identified the most stressed areas of the girder under design loads. Based on the FEA results, a targeted strengthening procedure using CFRP sheets was proposed. Various arrangements of CFRP sheets were tested, including different orientations and thicknesses up to 60% of the girder’s flange thickness. To validate the FEA accuracy, two small-scale specimen beams were prepared and tested in the laboratory. One beam was strengthened with CFRP sheets on the tension part of the inner flange side, similar to the suggested strengthening method for the girder. The FEA results show that the CFRP increases stresses by an average of 8% to 10% for the steel main girder, with strengthening effects up to 19% at the center of the CFRP strengthening positions, differing from a regular straight flange shape. Significantly reducing stresses required a total CFRP layer thickness of at least 50% of the flange’s total thickness. Applying a CFRP on the inner face of the girder preserves its usability without the need for openings in finishes or the metal deck surface. The findings highlight CFRP’s potential to enhance load-carrying capacity on curved surfaces and sustain increased applied loads, offering a promising solution for strengthening infrastructure and similar applications.https://www.mdpi.com/2075-5309/13/7/1753CFRPsteel girdernon-linear analysisstrengthening effectBIM model |
| spellingShingle | Mohamed A. M. A. Mahmoud Phan Viet Nhut Yukihiro Matsumoto Practical Investigation on the Strengthening of the Built-Up Steel Main Girder of a Metro Station with Carbon-Fiber-Reinforced Polymer on the Inside Part of the Tensioned Flange Buildings CFRP steel girder non-linear analysis strengthening effect BIM model |
| title | Practical Investigation on the Strengthening of the Built-Up Steel Main Girder of a Metro Station with Carbon-Fiber-Reinforced Polymer on the Inside Part of the Tensioned Flange |
| title_full | Practical Investigation on the Strengthening of the Built-Up Steel Main Girder of a Metro Station with Carbon-Fiber-Reinforced Polymer on the Inside Part of the Tensioned Flange |
| title_fullStr | Practical Investigation on the Strengthening of the Built-Up Steel Main Girder of a Metro Station with Carbon-Fiber-Reinforced Polymer on the Inside Part of the Tensioned Flange |
| title_full_unstemmed | Practical Investigation on the Strengthening of the Built-Up Steel Main Girder of a Metro Station with Carbon-Fiber-Reinforced Polymer on the Inside Part of the Tensioned Flange |
| title_short | Practical Investigation on the Strengthening of the Built-Up Steel Main Girder of a Metro Station with Carbon-Fiber-Reinforced Polymer on the Inside Part of the Tensioned Flange |
| title_sort | practical investigation on the strengthening of the built up steel main girder of a metro station with carbon fiber reinforced polymer on the inside part of the tensioned flange |
| topic | CFRP steel girder non-linear analysis strengthening effect BIM model |
| url | https://www.mdpi.com/2075-5309/13/7/1753 |
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