The punching shear capacity of reinforced concrete flat slabs and column bases without shear reinforcement as well as with failure on the level of maximum punching strength has been analyzed extensively in the past. For shear-reinforced slabs, most punching shear models follow an additive approach assuming a combination of a contribution of concrete and a contribution of shear reinforcement (steel contribution). However, a systematic evaluation of concrete and steel contributions depending on the amount of shear reinforcement has not yet been adequately possible since only a few test series with low and medium amounts of shear reinforcement investigating the failure within the shear-reinforced zone have been available.

In this paper, the development of concrete and steel contributions in shear-reinforced column bases is investigated in detail based on eleven punching tests with systematically varying shear reinforcement ratios. Significant differences between various punching design approaches regarding the interaction of concrete and steel contributions are revealed and a new method for evaluation is presented. The development of both contributions depending on the amount of shear reinforcement is discussed and compared to the design provisions according to Eurocode 2, Model Code 2010 and the draft for the next generation of Eurocode 2 which has been undergoing an optimization process in recent years.

过去对钢筋混凝土平板和无抗剪钢筋以及在最大抗冲强度水平上破坏的柱基的抗冲剪能力进行了广泛的分析。对于抗剪钢筋板，大多数冲剪模型遵循附加方法，假设混凝土的贡献和抗剪钢筋的贡献（钢的贡献）的组合。然而，根据抗剪钢筋的数量对混凝土和钢筋的贡献进行系统评估还不太可能，因为只有少数具有低和中等抗剪钢筋数量的测试系列可以研究受剪钢筋区域内的破坏。

在本文中，基于具有系统变化的抗剪配筋率的 11 次冲压试验，详细研究了混凝土和钢筋在受剪钢筋柱基中的贡献的发展。揭示了各种冲孔设计方法在混凝土和钢材相互作用方面的显着差异，并提出了一种新的评估方法。根据欧洲规范 2、模型规范 2010 和近年来一直在进行优化过程的下一代欧洲规范 2 草案，讨论并比较了根据抗剪钢筋量的两种贡献的发展并与设计规定进行了比较。