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http://dx.doi.org/10.5000/EESK.2003.7.3.079

Displacement Ductility Evaluation of Earthquake Experienced RC Bridge Piers with 2.5 Aspect Ratio  

정영수 (중앙대학교 토목공학과)
박창규 (중앙대학교 대학원 토목공학과)
이은희 (중앙대학교 대학원 토목공학과)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.7, no.3, 2003 , pp. 79-88 More about this Journal
Abstract
For the construction of PC bridge piers the implementation of 1992 seismic provisions, longitudinal steels were practically lap-spliced in the plastic hinge region. Experimental investigation was conducted ductility of evaluate the seismic earthquake-experienced reinforced concrete columns with 2,5 aspect ratio. Six test specimens were mode with test parameters: confinement ratios, lap splices, and retrofitting FRP materials. They were damaged under series of artificial earthquakes that could be compatible in Korean peninsula. Directly after the pseudo-dynamic test, damaged columns were retested under inelastic reversal cyclic loading simultaneously under a constant axial load, P＝0.1f$\_$ck/A$\_$g/. Residual seismic performance of damaged columns was evaluated and compared to that of the corresponding original columns. Test results show that PC bridge piers with lap-spliced longitudinal steels appeared to fail at low ductility. This was due to the debonding of the lap splice, which resulted from insufficient development of the longitudinal steels. The specimens externally wrapped with composite FRP straps in the potential plastic hinge region indicated significant improvement both in flexural strength and displacement ductility.
Keywords
seismic performance; damaged RC bridge piers; retrofitted with fiber sheet pseudo-dynamic test; quasi-static test;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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