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为了研究板厚、肋宽、配筋率对空心板冲切性能的影响,对9个空心板柱节点试件进行了抗冲切试验,得到不同条件下空心板柱结构节点的开裂荷载、极限荷载、板底位移以及钢筋和混凝土的应变数据.采用数据对比和理论分析的方法,研究不同板厚、孔径、肋宽和配筋率对冲切承载力的影响.试验结果表明:空心板柱结构节点的冲切破坏形式为脆性破坏;初始裂缝发生在顺管向加载柱板底外边缘和板底边之间;顺管向和垂直管向的冲切角度分别为50°～60°和30°～45°,即顺管向的冲切角大于垂直管向的冲切角;增大肋宽、板厚和板底配筋率可以提高节点的抗冲切承载力.
In order to study the influence of plate thickness, rib width and reinforcement ratio on punching performance of hollow slab, the punching shear tests of nine hollow slab-column joints were carried out, and the cracking load of hollow slab-column joints under different conditions was obtained. Load, plate bottom displacement and strain data of steel bar and concrete.The effects of different plate thickness, aperture, rib width and reinforcement ratio on punching shear strength were studied by means of data comparison and theoretical analysis.The results show that the hollow plate column structure The punching failure mode of the joints is brittle failure; the initial cracks occur between the outer edge of the bottom of the column and the bottom edge of the plate in the tube direction; the punching angles of the tube and the vertical tube are 50 ° ~ 60 ° and 30 °, respectively ° ~ 45 °, that is, the punching angle in the forward direction is larger than the punching angle in the vertical direction. Increasing the rib width, the plate thickness and the ratio of the bottom reinforcement can improve the punching shear resistance of the joints.