Abstract

This paper aims to study the experimental and analytical behaviour of cold-formed steel (CFS) T-joint members with or without external ring stiffeners under combined axial compression and bending. The parameters varied in the study include the type of T-joints (with and without ring stiffeners), spacing of the stiffeners (100 mm and 200 mm from the central axis of the T-Joint), and thickness of the ring stiffeners (4 mm and 6 mm). The load–deflection and load-strain behaviour were studied by measuring the overall deflection of the T-joints and strain using dial gauges and strain indicators, respectively. The load-carrying capacity of the T-joints with external ring stiffeners was compared, and the results of a numerical investigation showed good agreement. An extensive parametric study was carried out for different geometric parameters of the ring stiffener, chord, and brace member using the FE model to obtain the ultimate strength of the stiffened T-joints, and strength was also compared and obtained using the published equation. From the results of this investigation, it was found that the T-joints with external ring stiffeners can resist more strength and deformation when compared to the T-joints without external ring stiffeners.

中文翻译：

---

轴压与弯曲联合作用下外环加强筋对冷弯型钢T型接头弦杆的影响

摘要

本文旨在研究带或不带外环加劲肋的冷弯型钢（CFS）T 形接头构件在轴向压缩和弯曲联合作用下的实验和分析行为。研究中变化的参数包括 T 形接头的类型（带和不带环形加强筋）、加强筋的间距（距 T 形接头中心轴 100 毫米和 200 毫米）以及环形加强筋的厚度（4毫米和 6 毫米）。通过分别使用千分表和应变指示器测量 T 形接头的整体挠度和应变来研究载荷-挠度和载荷-应变行为。对带有外环加劲肋的 T 型接头的承载能力进行了比较，数值研究的结果显示出良好的一致性。使用有限元模型对环形加劲肋、弦杆和支撑构件的不同几何参数进行了广泛的参数研究，以获得加筋T型接头的极限强度，并使用已发布的方程对强度进行了比较和计算。研究结果表明，与不带外环加强筋的 T 形接头相比，带有外环加强筋的 T 形接头可以承受更高的强度和变形。