Browse > Article
http://dx.doi.org/10.4334/JKCI.2007.19.5.595

A Study on Strengthening of Reinforced Concrete Pier Caps Using Prestressed Near Surface Mounted CFRP  

Hong, Sung-Nam (Dept. of Construction and Environmental System Engineering, Sungkyunkwan University)
Kim, Tae-Wan (Dept. of Construction and Environmental System Engineering, Sungkyunkwan University)
Park, Sun-Kyu (Dept. of Construction and Environmental System Engineering, Sungkyunkwan University)
Park, Jong-Sup (Korea Institute of Construction Technology)
Park, Young-Hwan (Korea Institute of Construction Technology)
Publication Information
Journal of the Korea Concrete Institute / v.19, no.5, 2007 , pp. 595-602 More about this Journal
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.
Keywords
near surface mounted; pier cap; steel strand; CFRP;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Minnesota Department of Transportation Research, Retrofitting Shear Cracks in Reinforced Concrete Pier Caps Using Carbon Fiber Reinforced Polymers, Final Report, 2005, pp.7-22
2 Barros, J.A.O. and Dias, S.J.E., 'Near Surface Mounted CFRP Laminates for Shear Strengthening of Concrete Beams', Cement & Concrete Composites, Vol.28, No.3, 2006, pp.276-292   DOI   ScienceOn
3 Nanni, De Lorenzis and Tegola, A. La., 'Flexural and Shear Strengthening of Reinforved Concrete Structures with Near Surface Mounted FRP rods', Proceeding 3rd Iner.. Conf. on Advanved Composite Materials in Bridges and Structures, Ottawa, Canada, 2000, pp.512-528
4 김성칠, 박성용, 이용섭, 'T형 교각 머리부의 전단거동에 대한 실험적 연구', 산업기술종합연구소 논문집, 제 20집, 2000, pp.23-37
5 한국시설안전기술공단, 교각 코핑부의 안전성 평가 및 보수보강 매뉴얼, 한국시설안전기술공단, 2004, pp.7-17
6 Asplund S. O., 'Strengthening Bridge Slabs with Grouted Reinforcement', Journal of the ACI, Vol.20, No.6, 1949, pp.397-406
7 박재현, 홍성남, 박선규, 정우태, 박종섭, 박영환, '프리스트레스를 도입한 표면매립 FRP 보강보의 휨거동', 한국콘크리트학회 가을학술발표회 논문집, 한국콘크리트학회, 17권 2호, 2005, pp.157-160
8 홍성남, 박준명, 박선규, 박종섭, 박영환, '프리스트레스를 도입한 표면매립 보강보의 휨거동에 관한 실헌적 연구', 콘크리트학회 논문집, 18권 6호, 2006, pp.737-742   과학기술학회마을   DOI
9 Nordin, H., Tljsten B., and Carolin, A, 'Concrete Beams Strengthened with Prestressed Near Surface Mounted Reinforcement', FRP Composites in Civil Engineering, Vol.2, 2001, pp.1067-1075