The experimental program of this study consisted of 12 slab specimens. The parameters investigated include ratio of reinforcement in compression and tension, amount of shear reinforcement and arrangement of shear reinforcement. Flexural reinforcement ratio especially in tension had a noticeable effect on the mode of failure and ultimate punching capacity of slabs. The enhancement in the ultimate loads due to increasing tensile reinforcement ratio was ranging between 26.0 and 42.0%. Slightly enhancement (up to 12%) in ultimate loads was observed as a result of increasing compressive steel ratio. Provision of shear reinforcement was shown to be increased the perimeter of the failure. The ultimate loads were increased with the addition of single leg stirrups as shear reinforcement particularly in case of radial arrangement of shear reinforcement. The ECCS shows the most conservative prediction for punching shear capacity specially in case of using shear reinforcement and the mean predicted-to-experimental ultimate load is shown to be 0.7. The predictions following the ACI and CSA are closet to the experimental results. The mean predicted-to-experimental ultimate load is shown to be 0.8 for ACI and 0.96 for CSA. The BS provisions for punching shear analysis were shown to be overestimated in some cases, where the mean predicted-to-experimental ultimate load is shown to be 1.19.

中文翻译：

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冲孔荷载作用下钢筋混凝土板的性能

本研究的实验程序包括 12 个板坯试样。研究的参数包括受压和受拉钢筋的比例、抗剪钢筋的数量和抗剪钢筋的布置。抗弯配筋率，特别是受拉时，对楼板的破坏模式和极限抗冲能力有显着影响。由于拉伸增强率的增加，极限载荷的增强范围在 26.0% 和 42.0% 之间。由于增加了压缩钢比，观察到极限载荷略有增加（高达 12%）。提供抗剪钢筋被证明会增加破坏的周长。通过添加单腿箍筋作为抗剪钢筋，极限荷载增加，特别是在抗剪钢筋径向布置的情况下。ECCS 显示了冲剪承载力的最保守预测，特别是在使用抗剪钢筋的情况下，平均预测试验极限载荷显示为 0.7。遵循 ACI 和 CSA 的预测与实验结果最接近。平均预测到实验极限载荷显示为 ACI 为 0.8，CSA 为 0.96。BS 规定的冲切剪切分析在某些情况下被高估，其中预测到实验的平均极限载荷显示为 1.19。平均预测到实验极限载荷显示为 ACI 为 0.8，CSA 为 0.96。BS 规定的冲切剪切分析在某些情况下被高估，其中预测到实验的平均极限载荷显示为 1.19。平均预测到实验极限载荷显示为 ACI 为 0.8，CSA 为 0.96。BS 规定的冲切剪切分析在某些情况下被高估，其中预测到实验的平均极限载荷显示为 1.19。