Limits for the Punching Shear Capacity of the Flat Slabs Reinforced with Transverse Reinforcement

Natália Gregušová, J. Halvonik
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Abstract

One of the most effective and common ways of an increasing the punching shear capacity of the flat slabs is using of shear reinforcement. An important limit during the design is the determination of the maximum punching shear resistance. The fact that the calculation of such an important value is still clearly empirical has met with criticism from many experts in recent years. Consequently, a new design model for the calculation of the maximum punching shear resistance, based on the critical shear crack theory was developed. The second generation of the Eurocode 2 (prEC2) introduces a more accurate and sophisticated design model for the determination of the upper limit of the punching shear capacity and considers several parameters. The main aim of this paper is to describe the new methodology of calculation of the maximum punching shear strength and the parameters that could influence it. The paper deals also with an assessment of the suitability of new model by comparing it with experimental results, that have been selected from a database of specimens that failed by punching at the level of VR,max.
用横向钢筋加固的平板的冲剪承载力限值
提高平板抗冲剪能力的最有效和最常见的方法之一就是使用抗剪钢筋。设计过程中的一个重要限制是确定最大抗冲剪能力。近年来,对这一重要数值的计算显然仍是经验性的,这遭到了许多专家的批评。因此,以临界剪切裂缝理论为基础,开发出了计算最大抗冲剪能力的新设计模型。第二代欧洲规范 2 (prEC2)引入了一个更精确、更复杂的设计模型,用于确定抗冲剪能力的上限,并考虑了多个参数。本文的主要目的是介绍计算最大冲剪强度的新方法以及可能对其产生影响的参数。本文还通过将新模型与实验结果进行比较,评估了新模型的适用性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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