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Title |
Seismic-performance Flexural Experiments for Real Scale Piers with Circular Cross-section Considering Aging Effects
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Authors |
이승건(Seung-Geon Lee) ; 이수형(Soo-Hyung Lee) ; 이혜린(Hyerin Lee) ; 홍기증(Kee-Jeung Hong) |
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DOI |
https://doi.org/10.11112/jksmi.2021.25.6.131 |
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Abstract |
For old piers constructed when seismic design code had not been developed, lap splices usually exist in plastic hinge region. Corrosion of rebars causes decreasement in cross-sectional area of rebar and deterioration of lap-splice behaviour, thereby reducing the seismic performance of the old piers. In this research, according to these characteristics of old piers, test specimens are designed and manufactured considering rebar corrosion, lap splice, seismic design details, and seismic reinforcement. These effects are investigated through experiments. As a result of these experiment, rebar corrosion as well as lap splice reduces displacement ductility. When seismic design details or steel-plate reinforcement are applied, sufficient displacement ductility is expressed. For non-seismically designed specimens, loosening of the lap splice of transverse rebars caused buckling of longitudinal rebars and crushing of core concrete in plastic hinge region . For seismically designed specimen, area-reducing and untying of transverse rebars due to corrosion of rebars caused buckling of longitudinal rebars and crushing of core concrete.
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