Seismic Performance Evaluation of Shear-Critical R/C Bridge Piers Retrofitted with Fiber Sheets

섬유 보강된 휨전단 RC교각의 내전성능 평가

  • 송호진 (중앙대학교 대학원 토목공학과) ;
  • 정영수 (중앙대학교 토목공학과) ;
  • 김용곤 (한경대학교 안전공학과) ;
  • 이은희 (중앙대학교 대학원 토목공학과)
  • Published : 2002.03.01

Abstract

Lap splices of longitudinal reinforcement steels were practically located in the potential plastic hinge region of most bridge columns that were constructed before the 1992 seismic design provision of Roadway Bridge Design Specification in Korea. The objective of this research is to evaluate the seismic performance of shear-critical reinforced concrete(RC) bridge piers with poor detailing of the starter bars in the plastic hinge region, and to develop the enhancement scheme of their seismic capacity by retrofitting with fiber composites. Seven test specimens in the aspect ratio of 2.5 were made with three confinement ratios and two types of lap splices. Quasi-static test was conducted in a displacement-controlled test mode. A significant reduction of displacement ductility ratios were observed for test columns with lap splices of longitudinal steels.

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