The Structural Engineer > Archive > Volume 65 (1987) > Issues > Issue 13 > Punching Failure of Reinforced Concrete Flat Slabs at Edge Columns
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Punching Failure of Reinforced Concrete Flat Slabs at Edge Columns

An experimental and analytical investiagation of the punching shear capacity and moment transfer characteristics of reinforced concrete flat slabs at the edge column location is presented. In all, 12 models with carefully controlled boundary conditions were tested. Six of these were used to investigate the effect of column aspect ratio and size on the punching shear capacity. The remaining models were further reinforced using shearhead reinforcement, the main variable being the length and type of shearhead. From the results of the investigation a method for predicting the punching shear capacity has been proposed, based on the shear criterion of failure and designed to cover the use of shearhead reinforcement. Comparison with the British and American Codes of Practice reveals it to give consistently more accurate and reliable estimates of the punching shear capacity than either of those methods. S.G. Gilbert and C. Glass