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Title |
Seismic Behavior of High-Strength Reinforced Concrete Bridge Columns
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Authors |
황선경 ; 이진옥 ; 류효진 ; 윤현도 ; 임병훈 |
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Keywords |
고강도 콘크리트; 철근콘크리트 교각; 내진 거동; high-strength concrete; reinforced bridge; seismic behaior |
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Abstract |
This experimental investigation was conducted to examine the seismic performance of reinforced concrete bridge columns. The columns were subjected to a constant axial load and a cyclic horizontal load-inducing reversed bending moment. The variables studied in this research were the volumetric ratios of transverse reinforcement (ps=0.96, 1.44 percent) and axial load ratios (P/Po=0.05, 0.1, 0.2) and concrete strengths (35, 60MPa). Test results showed that bridge columns with 44% higher amounts of transverse reinforcement than that required by seismic provisions of ACI 318-02 showed ductile behavior. For bridge columns with axial load ratio(P/Po) less than 0.2, the ratio of Mmax over MACI, nominal moment capacity predicted by ACI 318-02 provisions, was consistently greater than 1 with approximately a 20% margin of safety.
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