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钢-混凝土-钢纤维增强再生骨料夹芯板栓钉连接件抗剪性能试验研究

Experimental Investigation on the Shear Behaviour of Stud-Bolt Connectors of Steel-Concrete-Steel Fibre-Reinforced Recycled Aggregates Sandwich Panels.

作者信息

Karimipour Arash, Ghalehnovi Mansour, Golmohammadi Mohammad, de Brito Jorge

机构信息

Department of Civil Engineering, University of Texas at El Paso (UTEP) and the Member of Center for Transportation Infrastructure Systems (CTIS), El Paso, TX 79968, USA.

Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad 9177948944, Iran.

出版信息

Materials (Basel). 2021 Sep 9;14(18):5185. doi: 10.3390/ma14185185.

DOI:10.3390/ma14185185
PMID:34576405
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8469430/
Abstract

Steel-concrete-steel (SCS) sandwich panels are manufactured with two thin high-strength steel plates and a moderately low-density and low-strength thick concrete core. In this study, 24 specimens were produced and tested. In these specimens, a new stud-bolt connector was used to regulate its shear behaviour in sandwich panels. The bolts' diameter, concrete core's thickness and bolts' spacing were the parameters under analysis. Furthermore, the concrete core was manufactured with normal-strength concrete and steel fibres concrete (SFC). Steel fibres were added at 1% by volume. In addition, the recycled coarse aggregate was used at 100% in terms of mass instead of natural coarse aggregate. Therefore, the ultimate bearing capability and slip of the sandwich panels were recorded, and the failure mode and ductility index of the specimens were evaluated. A new formula was also established to determine the shear strength of SCS panels with this kind of connectors. According to this study, increasing the diameter of the stud-bolts or using SFC in sandwich panels improve their shear strength and ductility ratio.

摘要

钢-混凝土-钢（SCS）夹芯板由两块薄的高强度钢板和一个中等低密度、低强度的厚混凝土芯制成。在本研究中，制作并测试了24个试件。在这些试件中，使用了一种新型的栓钉连接器来调节夹芯板的抗剪性能。螺栓直径、混凝土芯厚度和螺栓间距是分析的参数。此外，混凝土芯采用普通强度混凝土和钢纤维混凝土（SFC）制作。钢纤维按体积比1%添加。另外，用100%的再生粗骨料替代天然粗骨料。因此，记录了夹芯板的极限承载能力和滑移，并评估了试件的破坏模式和延性指标。还建立了一个新公式来确定使用这种连接器的SCS板的抗剪强度。根据本研究，增加栓钉直径或在夹芯板中使用SFC可提高其抗剪强度和延性比。

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