Modelling of CFRP-Strengthened RC Shear Walls with a Focus on End-Anchor Effects
This study first provides an overview of the development of a novel tube anchor system for the seismic strengthening or repair of reinforced concrete (RC) shear walls with carbon fibre-reinforced polymer (CFRP) sheets. The new anchor system can significantly improve the load transfer mechanism betwe...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/3/747 |
| _version_ | 1797613063140016128 |
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| author | Vahid Sadeghian Said Ali Said David Lau |
| author_facet | Vahid Sadeghian Said Ali Said David Lau |
| author_sort | Vahid Sadeghian |
| collection | DOAJ |
| description | This study first provides an overview of the development of a novel tube anchor system for the seismic strengthening or repair of reinforced concrete (RC) shear walls with carbon fibre-reinforced polymer (CFRP) sheets. The new anchor system can significantly improve the load transfer mechanism between the CFRP and supporting RC structural elements, resulting in ductile behaviour of the strengthened shear walls with increases of lateral load capacity and ductility by up to 2.6 and 8.3 times, respectively. The study then presents a new finite element modelling technique capable of capturing the complete cyclic response, i.e., from the elastic behaviour to the ultimate collapse of CFRP-strengthened RC shear walls with the newly developed tube anchor system. Two different modelling approaches are proposed to consider the effects of the tube anchor system. Additionally, other important CFRP- and RC-related mechanisms, including CFRP debonding effects, confinement enhancement, tension stiffening, compression softening, and strength and stiffness degradation under cyclic loads, are also considered in the model. By comparing the analytical and experimental results, it is demonstrated that the proposed modelling approach can accurately replicate the complex behaviour of CFRP-strengthened shear walls with a wide range of aspect ratios, from the ductile flexural behaviour of slender walls to the brittle shear failure of squat walls, without requiring detailed modelling of the anchor system. |
| first_indexed | 2024-03-11T06:49:38Z |
| format | Article |
| id | doaj.art-7bbdb54ff9dc44c9938eb1a498c186c2 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-11T06:49:38Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-7bbdb54ff9dc44c9938eb1a498c186c22023-11-17T10:03:35ZengMDPI AGBuildings2075-53092023-03-0113374710.3390/buildings13030747Modelling of CFRP-Strengthened RC Shear Walls with a Focus on End-Anchor EffectsVahid Sadeghian0Said Ali Said1David Lau2Department of Civil and Environmental Engineering, Carleton University, Ottawa, ON K1S 5B6, CanadaStructural Engineer in Training, Gray & Fick Ltd., London, ON N6E 2S8, CanadaDepartment of Civil and Environmental Engineering, Carleton University, Ottawa, ON K1S 5B6, CanadaThis study first provides an overview of the development of a novel tube anchor system for the seismic strengthening or repair of reinforced concrete (RC) shear walls with carbon fibre-reinforced polymer (CFRP) sheets. The new anchor system can significantly improve the load transfer mechanism between the CFRP and supporting RC structural elements, resulting in ductile behaviour of the strengthened shear walls with increases of lateral load capacity and ductility by up to 2.6 and 8.3 times, respectively. The study then presents a new finite element modelling technique capable of capturing the complete cyclic response, i.e., from the elastic behaviour to the ultimate collapse of CFRP-strengthened RC shear walls with the newly developed tube anchor system. Two different modelling approaches are proposed to consider the effects of the tube anchor system. Additionally, other important CFRP- and RC-related mechanisms, including CFRP debonding effects, confinement enhancement, tension stiffening, compression softening, and strength and stiffness degradation under cyclic loads, are also considered in the model. By comparing the analytical and experimental results, it is demonstrated that the proposed modelling approach can accurately replicate the complex behaviour of CFRP-strengthened shear walls with a wide range of aspect ratios, from the ductile flexural behaviour of slender walls to the brittle shear failure of squat walls, without requiring detailed modelling of the anchor system.https://www.mdpi.com/2075-5309/13/3/747carbon fibre-reinforced polymer (CFRP)reinforced concrete (RC) shear wallsfinite element modellingcyclic responseultimate collapsestrength degradation |
| spellingShingle | Vahid Sadeghian Said Ali Said David Lau Modelling of CFRP-Strengthened RC Shear Walls with a Focus on End-Anchor Effects Buildings carbon fibre-reinforced polymer (CFRP) reinforced concrete (RC) shear walls finite element modelling cyclic response ultimate collapse strength degradation |
| title | Modelling of CFRP-Strengthened RC Shear Walls with a Focus on End-Anchor Effects |
| title_full | Modelling of CFRP-Strengthened RC Shear Walls with a Focus on End-Anchor Effects |
| title_fullStr | Modelling of CFRP-Strengthened RC Shear Walls with a Focus on End-Anchor Effects |
| title_full_unstemmed | Modelling of CFRP-Strengthened RC Shear Walls with a Focus on End-Anchor Effects |
| title_short | Modelling of CFRP-Strengthened RC Shear Walls with a Focus on End-Anchor Effects |
| title_sort | modelling of cfrp strengthened rc shear walls with a focus on end anchor effects |
| topic | carbon fibre-reinforced polymer (CFRP) reinforced concrete (RC) shear walls finite element modelling cyclic response ultimate collapse strength degradation |
| url | https://www.mdpi.com/2075-5309/13/3/747 |
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