Enhancing the Effectiveness of Strengthening RC columns with CFRP sheets
The column is the most important structural element were strengthening of columns became a demanding issue. In this paper, the effectiveness of strengthening reinforced concrete (R.C) columns with carbon fiber reinforced polymers (CFRP) wraps has been improved by increasing the contact area between...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509522007203 |
| _version_ | 1811335931836235776 |
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| author | Khaled Samy Mohamed Attia Fouda Ahmed Fawzy Tark Elsayed |
| author_facet | Khaled Samy Mohamed Attia Fouda Ahmed Fawzy Tark Elsayed |
| author_sort | Khaled Samy |
| collection | DOAJ |
| description | The column is the most important structural element were strengthening of columns became a demanding issue. In this paper, the effectiveness of strengthening reinforced concrete (R.C) columns with carbon fiber reinforced polymers (CFRP) wraps has been improved by increasing the contact area between the column’s surface area and CFRP. A new strengthening technique was hired for the purpose of enhancing the efficiency of CFRP jackets in improving the load capacity of R.C columns, especially columns with rectangular sections. The method is based on increasing the contact area between the CFRP jacket and the column's surface area. This was done by adjusting the profile of the col's cross-section to almost ellipsoidal. The experimental program in this research includes testing 13 columns to include all test parameters, the shape of the cross-section, and the cross-section profile. The results include axial stresses and corresponding axial strains, and lateral strains at the mid-height and quarter height of tested specimens. And also, the cracking load and maximum load with crack patterns are determined. The comparison involved the study of the effect of the traditional CFRP jacket wrapping of R.C columns with square, and rectangular sections and the newly developed strengthening technique. A theoretical study was also conducted. Where the capacity of the square and rectangular confined columns with different radius of curvature, R, of the ellipsoidal profile is determined by the predicted and design equations. The study revealed that the strengthening technique is expected to effectively enhance the efficiency of the CFRP strengthening technique, especially for columns with square and rectangular sections as the area of the well-known dead zone of these columns is reduced using the proposed technique. Also, the results proved that the efficiency of strengthening tested columns by CFRP jacket has been enhanced using the strengthening technique by about 80% of original RC columns, which exceeds the traditional method (Jacket) CFRP wrap by 60%. |
| first_indexed | 2024-04-13T17:32:00Z |
| format | Article |
| id | doaj.art-fff684eeeabd4080919e0b2b32db4f74 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-04-13T17:32:00Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-fff684eeeabd4080919e0b2b32db4f742022-12-22T02:37:33ZengElsevierCase Studies in Construction Materials2214-50952022-12-0117e01588Enhancing the Effectiveness of Strengthening RC columns with CFRP sheetsKhaled Samy0Mohamed Attia Fouda1Ahmed Fawzy2Tark Elsayed3Higher Institute of Engineering & Technology in fifth settlement, Civil Engineering Department, Cairo, EgyptCanadian International College, Department of Civil Engineering, Cairo, Egypt; Corresponding author.Nanotechnology central lab, Electronics Research Institute (ERI), Cairo, EgyptCivil Engineering Department, Faculty of Engineering Mataria, Helwan university, Cairo, EgyptThe column is the most important structural element were strengthening of columns became a demanding issue. In this paper, the effectiveness of strengthening reinforced concrete (R.C) columns with carbon fiber reinforced polymers (CFRP) wraps has been improved by increasing the contact area between the column’s surface area and CFRP. A new strengthening technique was hired for the purpose of enhancing the efficiency of CFRP jackets in improving the load capacity of R.C columns, especially columns with rectangular sections. The method is based on increasing the contact area between the CFRP jacket and the column's surface area. This was done by adjusting the profile of the col's cross-section to almost ellipsoidal. The experimental program in this research includes testing 13 columns to include all test parameters, the shape of the cross-section, and the cross-section profile. The results include axial stresses and corresponding axial strains, and lateral strains at the mid-height and quarter height of tested specimens. And also, the cracking load and maximum load with crack patterns are determined. The comparison involved the study of the effect of the traditional CFRP jacket wrapping of R.C columns with square, and rectangular sections and the newly developed strengthening technique. A theoretical study was also conducted. Where the capacity of the square and rectangular confined columns with different radius of curvature, R, of the ellipsoidal profile is determined by the predicted and design equations. The study revealed that the strengthening technique is expected to effectively enhance the efficiency of the CFRP strengthening technique, especially for columns with square and rectangular sections as the area of the well-known dead zone of these columns is reduced using the proposed technique. Also, the results proved that the efficiency of strengthening tested columns by CFRP jacket has been enhanced using the strengthening technique by about 80% of original RC columns, which exceeds the traditional method (Jacket) CFRP wrap by 60%.http://www.sciencedirect.com/science/article/pii/S2214509522007203StrengtheningReinforced Concrete (R.C)JacketsCarbon Fiber Reinforced Polymer (CFRP) |
| spellingShingle | Khaled Samy Mohamed Attia Fouda Ahmed Fawzy Tark Elsayed Enhancing the Effectiveness of Strengthening RC columns with CFRP sheets Case Studies in Construction Materials Strengthening Reinforced Concrete (R.C) Jackets Carbon Fiber Reinforced Polymer (CFRP) |
| title | Enhancing the Effectiveness of Strengthening RC columns with CFRP sheets |
| title_full | Enhancing the Effectiveness of Strengthening RC columns with CFRP sheets |
| title_fullStr | Enhancing the Effectiveness of Strengthening RC columns with CFRP sheets |
| title_full_unstemmed | Enhancing the Effectiveness of Strengthening RC columns with CFRP sheets |
| title_short | Enhancing the Effectiveness of Strengthening RC columns with CFRP sheets |
| title_sort | enhancing the effectiveness of strengthening rc columns with cfrp sheets |
| topic | Strengthening Reinforced Concrete (R.C) Jackets Carbon Fiber Reinforced Polymer (CFRP) |
| url | http://www.sciencedirect.com/science/article/pii/S2214509522007203 |
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