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Title |
An Experimental Study on Punching Shear at the Connection of RC Column Constrained by H-Beam with 井 Shape
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Authors |
김량운 ; 이수권 ; 이정윤 ; 정창용 ; 김상식 |
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Keywords |
보-기둥 접합부 ; 구속 ; 뚫림 전단 beam-column joint ; confinement ; punching shear |
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Abstract |
Two parallel wide flange built-up beams are widely used as struts in resisting lateral earth pressure because of the effectiveness in structure and construction. In a certain structural system, the reinforced concrete columns are to be placed at the intersection where two perpendicular beams cross each other, the square part of the joint being filled with concrete. In the punching shear mechanism of the beam-column joint, the radial deformation caused due to shear cracking will be constrained by the spring action of the squarely encompassed beam flanges. As a result, the punching shear strength of the joint concrete can be expected to be increased. To verify this phenomenon experiments have been performed for various constraining elements and distances between columns and constraints. Test results are compared with the approximation analysis formula which has been proposed in this study, based on the code formula. The results calculated by the proposed equation show comparatively close agreement with the punching shear strength detected from the test.
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