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Title |
Flexure-Shear Behavior of Circular Bridge Columns under Cyclic Lateral Loads
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Keywords |
원형기둥; 실물 실험; 형상비; 휨-전단거동; 내진성능; circular columns; full scale test; aspect ratio; flexure-shear behavior; seismic performance |
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Abstract |
The purpose of this research is to investigate the flexure-shear behavior of bridge columns under seismic loads. Four full scale circular reinforced concrete columns were tested under cyclic lateral load with constant axial load. The selected test variables are aspect ratio(1.825, 2.5, 4.0), transverse steel configuration, and longitudinal steel ratio. Volumetric ratio of transverse hoop of all the columns is 0.0023 in the plastic hinge region. It corresponds to 24% of the minimum requirement of confining steel by Korean Bridge Design Specifications, which represent existing columns not designed by the current seismic design specifications or designed by limited ductility concept. The columns showed flexural failure or flexure-shear failure depending on the test variables. Failure behavior and seismic performance are investigated and discussed in this paper.
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