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Quasi-Static Test for Seismic Performance of Circular R.C. Bridge Piers Before and After Retrofitting

유리섬유 보강 원형 철근콘크리트 교각의 내진성능에 관한 준정적 실험연구

  • 정영수 (중앙대학교 토목공학과) ;
  • 이강균 (중앙대학교 공과대학 토목공학과 석사) ;
  • 한기훈 (중앙대학교 공과대학 토목공학과 석사) ;
  • 이대형 (중앙대학교 공과대학 토목공학과)
  • Published : 1999.10.01

Abstract

10 RC bridge piers have been made on a 1/3.4 scale model, and six piers of them were retrofitted with glassfiber. The have been tested in the quasi-static cyclic load so as to investigate their seismic enhancement before and after retrofitting with glassfibers. The objective of this experimental study is to investigate how to strength the ductility of reinforced concrete bridge piers which have been nonseismically designed and constructed in Korea before 1992. Important test parameters are axial load, load pattern, retrofit type. Glassfiber sheets were used for retrofitting in the plastic hinge region of concrete piers. The nonlinear behavior of bridge columns have been evaluated through their yield and ultimate strength, energy dissipation, displacement ductility and load-deflection characteristics under quasi-static cyclic loads. It can be concluded from the test that concrete piers strengthened with glassfibers have been enhanced for their ductile behavior by approximate 50%.

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