Konieczny Kazimierz, Dudek Daniel, Kukiełka Alfred
Building Research Institute (ITB), ul. Filtrowa 1, 00-611 Warsaw, Poland.
Materials (Basel). 2024 Feb 28;17(5):1105. doi: 10.3390/ma17051105.
Pull-out strength tests conducted on screw anchors in uncracked concrete substrates of the C25/30 class are presented in this article. The destructive force for anchor-concrete fasting was tested, and in the next step, the average pull-out strengths of screw anchors in concrete substrates with and without the addition of steel fiber were determined. Currently, the pull-out strengths of anchors in fiber-reinforced concrete substrates are defined as for unreinforced concrete substrates. Therefore, pull-out tests were performed for screw anchors in fiber-reinforced concrete substrates. Fiber contents of 10, 20, 30, and 50 kg/m were used. An increase in the load capacity of screw anchors in a fiber-reinforced concrete substrate was demonstrated in a pull-out test compared to base samples without fibers. The coefficient related to the actual fastening behavior of a screw anchor in the fiber-reinforced concrete substrate was determined. It was assumed that a coefficient of 13.10 should be adopted. This was the lowest value obtained for the load capacity in this study for screw anchors in a fiber-reinforced concrete substrate.
本文介绍了在C25/30级无裂缝混凝土基材中对螺杆锚进行的拉拔强度试验。测试了锚固件与混凝土固定的破坏力，接下来，测定了添加和未添加钢纤维的混凝土基材中螺杆锚的平均拉拔强度。目前，纤维增强混凝土基材中锚固件的拉拔强度定义与非增强混凝土基材相同。因此，对纤维增强混凝土基材中的螺杆锚进行了拉拔试验。使用了10、20、30和50 kg/m的纤维含量。与无纤维的基础样品相比，在拉拔试验中证明了纤维增强混凝土基材中螺杆锚的承载能力有所提高。确定了与螺杆锚在纤维增强混凝土基材中的实际固定行为相关的系数。假定应采用13.10的系数。这是本研究中纤维增强混凝土基材中螺杆锚承载能力的最低值。
