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Title |
Seismic Performance Evaluation of Reinforced Concrete Columns by Applying Steel Fiber-Reinforced Mortar at Plastic Hinge Region
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Keywords |
강섬유 시멘트 복합체 ; 내진기둥 ; 균열제어 ; 반복하중 steel fiber-reinforced cementitious mortar ; seismic-resistant column ; crack control ; cyclic load |
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Abstract |
This paper presents a reinforced concrete composite column method in order to improve seismic performance of reinforced concrete column specimens by selectively applying steel fiber-reinforced mortars at the column plastic hinge region. In order to evaluate seismic improvement of the newly developed column method, a series of cyclic load test of column specimens under a constant axial load was investigated by manufacturing three specimens, two reinforced concrete composite columns by applying steel fiber-reinforced mortars at the column plastic hinge region and one conventional reinforced concrete column. Both concrete and steel fiber-reinforced mortar was cast-in placed type. From cyclic load test, it was found that the newly developed steel fiber-reinforced columns showed improved seismic performances than conventional reinforced concrete column in controlling bending and shear cracks as well as improving seismic lateral load-carrying capacities and lateral deformation capacities.
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