다양한 단면을 지닌 콘크리트 압축부재의 CFS 보강에 따른 거동해석

Analysis of the Behavior of Concrete Compressive Member with Various Cross-Sectional Shapes Strengthened by CFS

  • 이상호 (연세대학교 사회환경시스템공학부) ;
  • 이민우 (연세대학교 사회환경시스템공학) ;
  • 김장호 (세종대학교 토목환경공학) ;
  • 김진근 (한국과학기술원(KAIST) 토목공학과)
  • 발행 : 2002.10.01

초록

The purpose of this study is to develop an analytic model which can describe the behavior or concrete compressive member strengthened by CFS(Carbon Fiber Sheet) with various cross-sectional shapes such as circular. square, and octagonal and various laminate angles. The failure criterion of laminated CFS is based on Tsai-Wu failure criterion. The stress strain model of confined concrete compressive member is based on an equation proposed by Mander. The effective lateral confining pressure is considered and modified according to various cross-sectional shapes. Octagonal cross-section shows the best results in the aspect of ductility, while circular does in compressive strengthening effects. In addition, [0/0/0/0] laminate in which the direction of fiber is parallel to the direction of principal stress shows the superior strength and ductility than other laminates. The analytic results show that strength and ductility of the analytic model depend on the cross-sectional shapes as well as the laminate angles.

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