Browse > Article

Evaluation on Strengthening Capacities and Rebound Rate of Structures with Sprayed FRP  

Han, Seung-Chul (고려대학교 건축.사회환경공학과)
Yang, Jun-Mo (고려대학교 건축.사회환경공학과)
Yoon, Young-Soo (고려대학교 건축.사회환경공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.12, no.1, 2008 , pp. 193-202 More about this Journal
Abstract
This paper investigates experimentally the confining effect, strengthening capacity and rebound rate of sprayed Fiber-Reinforced-Polymer (SFRP). From the method, resin and chopped fibers are sprayed separately from the nozzle with high pressure, and then they are attached to the concrete surface, so structure could be repaired. To evaluate the strengthening effect of sprayed FRP, cylindrical specimens and beam specimens were strengthening with SFRP. As main material of FRP, glass fiber and polyester resin are used. To investigate the optimum condition of sprayed FRP, the effects of fiber length, coating thickness, fiber volume ratio and concrete strength were examined. Capacities of sprayed FRP method were also compared to the FRP sheet method. In case of the sprayed FRP, rebound rate is important parameter considering economical efficiency and constructibility, so rebound rate of was discussed. From the test results, optimum conditions of sprayed FRP were determined. SFRP method showed superior strengthening capacities than FRP sheet method.
Keywords
Confining effect; Flexural strengthening; Glass fiber; Sprayed FRP; Polyester; Rebound rate;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Arya C., Clarke J.L., Kay E.A., O'regan P.D., "TR 55: Design guidance for strengthening concrete structures using fibre composite materials: a review", Engineering Structures, Vol. 24, 2002, pp. 889-900   DOI   ScienceOn
2 Banthia N. and Boyd A.J., "Sprayed fibre- reinforced polymers for repairs," Can, J. Civ. Eng., Vol. 27, 2000, pp. 907-915   DOI
3 Lee H.K., Hausmann L.R., "Structural repair and strengthening of damaged RC beams with sprayed FRP," Composite structures, Vol. 63, 2000, pp. 201-209
4 Furuta T., Kanakubo T., Nemoto T., Takahashi K. and Fukuyama H., "Sprayed-up FRP strengthening for concrete structures," Proceedings of the International Symposium on Earthquake Engineering Commemorating Tenth Anniversary of the 1995 Kobe Earthquake, Vol. 2, 2005, pp. 299-307
5 Banthia N., Yan C. and Nandakumar N., "Sprayed FRPs for repairs of concrete structures," Proceedings of the 2nd international conference on advanced composite materials, August, Montreal, Que., 1996, pp. 537-546
6 Anania L., Badala A., Giusy F., "Increasing the flexural performance of RC beams strengthened with CFRP materials", Construction and Building Materials, Vol. 19, 2005, pp. 55-61   DOI   ScienceOn