Performance of Reinforced Concrete Beams Strengthened with Carbon Fiber Reinforced Polymer Strips
Autor: | Changhyuk Kim, Jae Sang Moon, Muhammad Haroon |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Technology
Materials science Carbon fiber reinforced polymers STRIPS Article law.invention law Shear strength unidirectional layout bidirectional layout General Materials Science CFRP Carbon fiber reinforced polymer Microscopy QC120-168.85 business.industry QH201-278.5 Structural engineering Reinforced concrete Engineering (General). Civil engineering (General) Transverse reinforcement Stirrup TK1-9971 Shear (sheet metal) shear strengthening Descriptive and experimental mechanics Electrical engineering. Electronics. Nuclear engineering TA1-2040 business |
Zdroj: | Materials Volume 14 Issue 19 Materials, Vol 14, Iss 5866, p 5866 (2021) |
ISSN: | 1996-1944 |
DOI: | 10.3390/ma14195866 |
Popis: | Carbon fiber reinforced polymers (CFRP) have shown considerable potential in the repair and rehabilitation of deficient reinforced concrete (RC) structures. To date, several CFRP strengthening schemes have been studied and employed practically. In particular, strengthening of shear damaged RC members with CFRP materials has received much attention as an effective repair and strengthening approach. Most existing studies on strengthening shear-deficient RC members have used unidirectional CFRP strips. Recent studies on strengthened T-beams demonstrated that a bidirectional CFRP layout was more effective than a unidirectional layout. As such studies are limited, in this study, the feasibility of bidirectional CFRP layouts for the shear strengthening of rectangular RC beams was experimentally evaluated. Bidirectional layout details with CFRP anchors as well as rehabilitation timing were considered and investigated. The test results showed that the members with a bidirectional CFRP layout carried less shear strength capacity than those with unidirectional layouts for the same quantity of CFRP material. Nevertheless, the bidirectional CFRP layout allowed for a uniformly distributed stirrup strain compared to the unidirectional CFRP layout at the same load level, which increased the efficiency of the transverse reinforcement. Additionally, the shear contribution of CFRP material according to the CFRP strengthening timing was verified. |
Databáze: | OpenAIRE |
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