Grabski Maciej, Ambroziak Andrzej
Faculty of Civil and Environmental Engineering, Gdansk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233 Gdansk, Poland.
Maciej Grabski Engineering, 94B/1 Leszczynowa Street, 80-175 Gdansk, Poland.
Materials (Basel). 2021 Dec 27;15(1):188. doi: 10.3390/ma15010188.
The scope of this paper is to investigate analytically and numerically the influence of shear cap size and stiffness on the distribution of shear forces in flat slabs in a slab-column-connections-reinforced concrete structure. The effect of support (shear cap) stiffness on the calculation of the length of the shear control perimeter according to the available methods is presented. Based on the analysis, the authors indicate in what range of support stiffness the corner concentrations become important in the calculation of the punching resistance. For shear caps with high flexibility (α1 ≤ 0.5), the concentration of internal forces in the corners does not occur. The authors compare the numerical results obtained from the calculation methods and indicate the correlations, which can be useful guidance for structural designers. In the case of large shear caps, the simplified MC2010 method gives a significantly lower value of the effective control perimeter length compared to more accurate methods. This paper is intended to provide scientists, civil engineers, and designers with guidelines on which factors influence punching shear load capacity of the slab-column connections with shear caps.
本文的目的是通过分析和数值方法研究在板柱连接钢筋混凝土结构中，抗剪帽尺寸和刚度对无梁楼盖中剪力分布的影响。给出了支撑（抗剪帽）刚度对根据现有方法计算抗剪控制周长长度的影响。基于分析，作者指出在何种支撑刚度范围内，角部集中力在冲切抗力计算中变得重要。对于高柔性抗剪帽（α1≤0.5），角部不会出现内力集中。作者比较了从计算方法中获得的数值结果，并指出了相关性，这可为结构设计师提供有用的指导。在抗剪帽较大的情况下，与更精确的方法相比，简化的MC2010方法给出的有效控制周长长度值显著更低。本文旨在为科学家、土木工程师和设计师提供有关哪些因素影响带抗剪帽的板柱连接冲切剪力承载能力的指导方针。
