Experimental and analytical investigations of reinforced concrete beams strengthened by different CFRP sheet schemes
The use of reinforced fibre polymers to strengthen and repair structural elements is widely spreading. However, there is lack of knowledge of the actual behavior of strengthened structures with FRP sheets. This paper discusses the experimental results of the flexural strengthening of reinforced conc...
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| Language: | English |
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Gruppo Italiano Frattura
2021-04-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/3004/3205 |
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| author | Khaled Fawzy Hilal Hassan M. Madqour |
| author_facet | Khaled Fawzy Hilal Hassan M. Madqour |
| author_sort | Khaled Fawzy |
| collection | DOAJ |
| description | The use of reinforced fibre polymers to strengthen and repair structural elements is widely spreading. However, there is lack of knowledge of the actual behavior of strengthened structures with FRP sheets. This paper discusses the experimental results of the flexural strengthening of reinforced concrete (RC) beams by carbon fibre-reinforced polymer (CFRP) sheets bonded by epoxy adhesive to the tensile surface of the beams. Using a four-point bending load system over an effective span of 1800 mm, a total of ten beams with an overall dimension of 150 mm * 200 mm * 2000 mm with different degrees of strengthening schemes were tested. The number of layers, strengthening scheme (side and U-shape bonding) and reinforcement ratio are the major parameters of the experimental study. The research indicates that the flexural strength of the beams was substantially improved as the layers of laminate increased (between 31.80 and 71.50 %) and using U shape in ends that delay or prevent debonding failure. The experimental results compared to that analytically obtained by using ANSYS model showing acceptable agreement with deviations varying no more than 10 % for all specimens. |
| format | Article |
| id | doaj-art-758a4b9ae47a4bd49d35006086928df1 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2021-04-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-758a4b9ae47a4bd49d35006086928df12025-01-03T00:45:59ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932021-04-01155612313610.3221/IGF-ESIS.56.1010.3221/IGF-ESIS.56.10Experimental and analytical investigations of reinforced concrete beams strengthened by different CFRP sheet schemesKhaled FawzyHilal HassanM. MadqourThe use of reinforced fibre polymers to strengthen and repair structural elements is widely spreading. However, there is lack of knowledge of the actual behavior of strengthened structures with FRP sheets. This paper discusses the experimental results of the flexural strengthening of reinforced concrete (RC) beams by carbon fibre-reinforced polymer (CFRP) sheets bonded by epoxy adhesive to the tensile surface of the beams. Using a four-point bending load system over an effective span of 1800 mm, a total of ten beams with an overall dimension of 150 mm * 200 mm * 2000 mm with different degrees of strengthening schemes were tested. The number of layers, strengthening scheme (side and U-shape bonding) and reinforcement ratio are the major parameters of the experimental study. The research indicates that the flexural strength of the beams was substantially improved as the layers of laminate increased (between 31.80 and 71.50 %) and using U shape in ends that delay or prevent debonding failure. The experimental results compared to that analytically obtained by using ANSYS model showing acceptable agreement with deviations varying no more than 10 % for all specimens.https://www.fracturae.com/index.php/fis/article/view/3004/3205strengtheningcarbon fibre reinforced polymerdeflectionansysultimate strengthductility |
| spellingShingle | Khaled Fawzy Hilal Hassan M. Madqour Experimental and analytical investigations of reinforced concrete beams strengthened by different CFRP sheet schemes Fracture and Structural Integrity strengthening carbon fibre reinforced polymer deflection ansys ultimate strength ductility |
| title | Experimental and analytical investigations of reinforced concrete beams strengthened by different CFRP sheet schemes |
| title_full | Experimental and analytical investigations of reinforced concrete beams strengthened by different CFRP sheet schemes |
| title_fullStr | Experimental and analytical investigations of reinforced concrete beams strengthened by different CFRP sheet schemes |
| title_full_unstemmed | Experimental and analytical investigations of reinforced concrete beams strengthened by different CFRP sheet schemes |
| title_short | Experimental and analytical investigations of reinforced concrete beams strengthened by different CFRP sheet schemes |
| title_sort | experimental and analytical investigations of reinforced concrete beams strengthened by different cfrp sheet schemes |
| topic | strengthening carbon fibre reinforced polymer deflection ansys ultimate strength ductility |
| url | https://www.fracturae.com/index.php/fis/article/view/3004/3205 |
| work_keys_str_mv | AT khaledfawzy experimentalandanalyticalinvestigationsofreinforcedconcretebeamsstrengthenedbydifferentcfrpsheetschemes AT hilalhassan experimentalandanalyticalinvestigationsofreinforcedconcretebeamsstrengthenedbydifferentcfrpsheetschemes AT mmadqour experimentalandanalyticalinvestigationsofreinforcedconcretebeamsstrengthenedbydifferentcfrpsheetschemes |