Load-Bearing Performance of Non-Prismatic RC Beams Wrapped with Carbon FRP Composites
This study investigated the influence of CFRP composite wrapping techniques on the load–deflection and strain relationships of non-prismatic RC beams. A total of twelve non-prismatic beams with and without openings were tested in the present study. The length of the non-prismatic section was also va...
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| Format: | Article |
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MDPI AG
2023-06-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/12/5409 |
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| author | Suniti Suparp Ali Ejaz Kaffayatullah Khan Qudeer Hussain Panuwat Joyklad Panumas Saingam |
| author_facet | Suniti Suparp Ali Ejaz Kaffayatullah Khan Qudeer Hussain Panuwat Joyklad Panumas Saingam |
| author_sort | Suniti Suparp |
| collection | DOAJ |
| description | This study investigated the influence of CFRP composite wrapping techniques on the load–deflection and strain relationships of non-prismatic RC beams. A total of twelve non-prismatic beams with and without openings were tested in the present study. The length of the non-prismatic section was also varied to assess the effect on the behavior and load capacity of non-prismatic beams. The strengthening of beams was performed by using carbon fiber-reinforced polymer (CFRP) composites in the form of individual strips or full wraps. The linear variable differential transducers and strain gauges were installed at the steel bars to observe the load–deflection and strain responses of non-prismatic RC beams, respectively. The cracking behavior of unstrengthened beams was accompanied by excessive flexural and shear cracks. The influence of CFRP strips and full wraps was primarily observed in solid section beams without shear cracks, resulting in enhanced performance. In contrast, hollow section strengthened beams exhibited minor shear cracks alongside the primary flexural cracks within the constant moment region. The absence of shear cracks was reflected in the load–deflection curves of strengthened beams, which demonstrated a ductile behavior. The strengthened beams demonstrated 40% to 70% higher peak loads than control beams, whereas the ultimate deflection was increased up to 524.87% compared to that of the control beams. The improvement in the peak load was more prominent as the length of the non-prismatic section increased. A better improvement in ductility was achieved for the case of CFRP strips in the case of short non-prismatic lengths, whereas the efficiency of CFRP strips was reduced as the length of the non-prismatic section increased. Moreover, the load–strain capacity of CFRP-strengthened non-prismatic RC beams was higher than the control beams. |
| first_indexed | 2024-03-11T01:57:50Z |
| format | Article |
| id | doaj.art-3e244dbd865844189c85d75c41823b13 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T01:57:50Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-3e244dbd865844189c85d75c41823b132023-11-18T12:30:35ZengMDPI AGSensors1424-82202023-06-012312540910.3390/s23125409Load-Bearing Performance of Non-Prismatic RC Beams Wrapped with Carbon FRP CompositesSuniti Suparp0Ali Ejaz1Kaffayatullah Khan2Qudeer Hussain3Panuwat Joyklad4Panumas Saingam5Department of Civil and Environmental Engineering, Faculty of Engineering, Srinakharinwirot University, Nakhonnayok 26120, ThailandNational Institute of Transportation, National University of Sciences and Technology (NUST), Islamabad 44000, PakistanDepartment of Civil and Environmental Engineering, College of Engineering, King Faisal University, Al-Hofuf 31982, Saudi ArabiaDr. House Consultants Co., Ltd., Bangkok 10330, ThailandDepartment of Civil and Environmental Engineering, Faculty of Engineering, Srinakharinwirot University, Nakhonnayok 26120, ThailandDepartment of Civil Engineering, School of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, ThailandThis study investigated the influence of CFRP composite wrapping techniques on the load–deflection and strain relationships of non-prismatic RC beams. A total of twelve non-prismatic beams with and without openings were tested in the present study. The length of the non-prismatic section was also varied to assess the effect on the behavior and load capacity of non-prismatic beams. The strengthening of beams was performed by using carbon fiber-reinforced polymer (CFRP) composites in the form of individual strips or full wraps. The linear variable differential transducers and strain gauges were installed at the steel bars to observe the load–deflection and strain responses of non-prismatic RC beams, respectively. The cracking behavior of unstrengthened beams was accompanied by excessive flexural and shear cracks. The influence of CFRP strips and full wraps was primarily observed in solid section beams without shear cracks, resulting in enhanced performance. In contrast, hollow section strengthened beams exhibited minor shear cracks alongside the primary flexural cracks within the constant moment region. The absence of shear cracks was reflected in the load–deflection curves of strengthened beams, which demonstrated a ductile behavior. The strengthened beams demonstrated 40% to 70% higher peak loads than control beams, whereas the ultimate deflection was increased up to 524.87% compared to that of the control beams. The improvement in the peak load was more prominent as the length of the non-prismatic section increased. A better improvement in ductility was achieved for the case of CFRP strips in the case of short non-prismatic lengths, whereas the efficiency of CFRP strips was reduced as the length of the non-prismatic section increased. Moreover, the load–strain capacity of CFRP-strengthened non-prismatic RC beams was higher than the control beams.https://www.mdpi.com/1424-8220/23/12/5409non-prismaticdeflectionstrainCFRP stripssimply supported beamsshear |
| spellingShingle | Suniti Suparp Ali Ejaz Kaffayatullah Khan Qudeer Hussain Panuwat Joyklad Panumas Saingam Load-Bearing Performance of Non-Prismatic RC Beams Wrapped with Carbon FRP Composites Sensors non-prismatic deflection strain CFRP strips simply supported beams shear |
| title | Load-Bearing Performance of Non-Prismatic RC Beams Wrapped with Carbon FRP Composites |
| title_full | Load-Bearing Performance of Non-Prismatic RC Beams Wrapped with Carbon FRP Composites |
| title_fullStr | Load-Bearing Performance of Non-Prismatic RC Beams Wrapped with Carbon FRP Composites |
| title_full_unstemmed | Load-Bearing Performance of Non-Prismatic RC Beams Wrapped with Carbon FRP Composites |
| title_short | Load-Bearing Performance of Non-Prismatic RC Beams Wrapped with Carbon FRP Composites |
| title_sort | load bearing performance of non prismatic rc beams wrapped with carbon frp composites |
| topic | non-prismatic deflection strain CFRP strips simply supported beams shear |
| url | https://www.mdpi.com/1424-8220/23/12/5409 |
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