Repair and Strengthening Methods for Concrete Structures using Sprayed Fiber Reinforced Polymers - Strengthening performance of Reinforced Concrete Shear Columns -

Sprayed FRP 공법에 의한 콘크리트 구조물의 보수.보강법 개발에 관한 연구 - 철근콘크리트 전단기둥의 보강성능 평가 -

  • 이강석 (한양대학교 친환경건축연구센터) ;
  • 변인희 (한양대학교 대학원 건축환경공학과) ;
  • 손영선 (한양대학교 대학원 건축환경공학과) ;
  • 이문성 (한양대학교 BK21 지속가능 건축기술 전문 인력 양성사업단) ;
  • 이성호 (북경공업대학교 건축공정학원) ;
  • 이리형 (한양대학교 건축환경공학과)
  • Published : 2006.11.04

Abstract

In this study, a seismic performance of reinforced concrete columns strengthened by a sprayed fiber reinforced polymer (SFRP) is investigated. For this purpose, six column specimens approximately scaled into 2/3, are designed and tested under a constant axial load, 10% of the nominal axial strength of column, and pseudo-static reversed cyclic lateral loading system. Four specimens are strengthened by Sprayed FRP using different combinations of short fibers (carbon or glass fiber) and resins (epoxy or vinyl esther). For comparison, the test investigated in this study also includes a specimen strengthened using carbon fiber reinforced polymer (CFRP), and also a control specimen without strengthening. The results revealed that specimens strengthened using SFRP showed a improved structure behavior, compared to control specimen, in terms of strength, ductility, lateral drift capacity, and energy-absorbtion capacity. In addition, compared to the specimen strengthened using CFRP, Sprayed FRP-strengthened specimens reasonably showed a equivalent seismic performance.

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