Due to its superior strength and ductility, the utilisation of concrete-filled steel tube (CFST) columns has grown over the last few years. However, due to unequal lateral inflation properties, infill concrete and steel tube slip against one another during early loading phases. This paper presented a novel type of CFST section, a diagonally stiffened CFST column as a solution to this problem. It consists of a circular steel tube with stiffening bars installed inside the outer steel tube from one top end to the diagonally opposite bottom end. The suggested section is presented using various stiffening strategies, including binary, tertiary, and quaternary arrangements. The effectiveness of the suggested column section under an axial load is examined using finite element (FE) modelling, and the validation of the FE model was established using experimental testing carried out by previous researchers on unstiffened and stiffened CFST columns. Analysis was done on specimens of diagonally stiffened CFST columns to evaluate the load-carrying capacity, load vs deformation behaviour, stress distribution, and failure pattern. According to the findings of this study, CFST sections with diagonal stiffeners have higher ultimate load capacity than unstiffened CFST columns. Stiffening bars increase the ductility of brittle infill concrete and eliminate localised steel tube buckling. It was recommended that the number of stiffeners be altered to even numbers since odd numbers of stiffeners can cause asymmetry in the section, which can increase the concentration of stress.

由于其卓越的强度和延展性，钢管混凝土 (CFST) 柱的使用在过去几年中不断增长。然而，由于横向膨胀特性不均匀，填充混凝土和钢管在早期加载阶段会相互滑动。本文提出了一种新型的钢管混凝土截面，即斜加劲钢管混凝土柱来解决这一问题。它由一根圆形钢管组成，加强筋从一个顶端到对角相对的底端安装在外钢管内。建议的部分采用各种加固策略，包括二元、三元和四元排列。使用有限元 (FE) 建模检查了建议的柱截面在轴向载荷下的有效性，并使用先前研究人员对非加筋和加筋钢管混凝土柱进行的实验测试建立了 FE 模型的验证。对斜加劲钢管混凝土柱的样本进行了分析，以评估承载能力、载荷与变形行为、应力分布和失效模式。根据这项研究的结果，带有对角加劲肋的钢管混凝土截面比未加劲的钢管混凝土柱具有更高的极限承载能力。加强筋增加了脆性填充混凝土的延展性并消除了局部钢管屈曲。建议将加劲肋的数量更改为偶数，因为奇数数量的加劲肋会导致截面不对称，从而增加应力集中。