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Title |
Plastic Hinge Length of Reinforced Concrete Columns with Low Height-to-Width Ratio
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Keywords |
RC 기둥 ; 소성붕괴메카니즘 ; 소성힌지 길이 ; 축력 ; 휨전단파괴 ; 축방향 변형률 RC column ; plastic collapse mechanism ; plastic hinge length ; axial force ; shear after flexural yielding ; axial strain |
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Abstract |
The reinforced concrete members are designed to fail in flexural to lead ductile fracture. In the building structures, the failure is typically imposed on beams to prevent damages in columns. However, progression of plastic collapse mechanism may ultimately develop, a plastic hinge at the bottem end of the first floor column, which then can be subjected to shear or bond finally due to large axial force and small shear span-to-depth ratio. In this study, 10 RC column specimens failed in shear after flexural yielding was investigated to determine the factors affecting the plastic hinge length. The findings of this study showed that the most effective factor affecting the plastic hinge length was an axial force. As an axial force increase, an axial strain and a ductility ratio were decreased obviously. The test also shows the observed plastic hinge length was about 0.8~1.2d and the this result has difference compared with forward research.
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