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Title |
A Study on Strengthening of Reinforced Concrete Pier Caps Using Prestressed Near Surface Mounted CFRP
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Authors |
홍성남 ; 김태완 ; 박선규 ; 박종섭 ; 박영환 |
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Keywords |
표면매립 ; 교각 두부 ; 강연선 ; 탄소섬유보강폴리머 ; near surface mounted ; pier cap ; steel strand ; CFRP |
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Abstract |
Recently, concrete structures with carbon fiber reinforced polymer (CFRP) reinforcements have been commonly used for the bridge and building construction. In this paper, pier caps were strengthened by prestressed near surface mounted CFRP. To verify the effectiveness of the strengthening method, 7 pier cap specimens were fabricated. One specimen was designed for control, two for external prestressing steel strands, two for CFRP plates, and two for CFRP bars. Experimental variables consist of type of reinforcement materials and prestressing levels. The results of laboratory have shown that the ultimate load capacities of prestressed near surface mounted CFRP specimens were about 20{sim}33% greater than that of a control specimen. Also, ultimate load capacities of prestressed near surface mounted CFRP specimens were similar to those of external prestressing specimens with steel strands.
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