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目前,不同截面钢管混凝土(CFST)柱的轴向承载力采用不同的公式计算。研究人员和设计师试图在柱的设计中找到一个适用于不同截面(包括实心、空心、圆形和多边形截面)的统一公式,这一直是他们面临的一个挑战,事实上也是十分重要的问题。为满足现代的设计要求,结构在材料的使用、结构构件的拓扑学方面不断优化,上述问题应运而生。作者之前研究了圆形空心和实心CFST柱轴向承载力的统一公式,该文将其拓展到正多边形截面空心和实心CFST柱,将圆形截面作为多边形边数为1的特殊情况。最后,给出用于计算圆形或多边形截面实心和空心钢管混凝土柱轴向承载力的统一公式。此外,对空心圆形和方形钢管混凝土柱进行了试验。这些试验结果对有限的公开发表的文献进行了补充,也验证了该分析公式。
At present, the axial bearing capacity of concrete filled CFST columns is calculated by different formulas. Researchers and designers trying to find a uniform formula for different sections (solid, hollow, circular and polygonal sections) in the design of columns have always been a challenge and indeed a very important one for them. In order to meet the modern design requirements, the structure is continually optimized in terms of the use of materials and the topological aspects of structural components. These problems arise. The author has previously studied the uniform formula for the axial bearing capacity of circular hollow and solid CFST columns. This article extends it to hollow and solid CFST columns with regular polygon sections. The circular section is taken as a special case where the number of sides of a polygon is 1. Finally, a uniform formula for calculating the axial bearing capacity of CFST columns with circular or polygonal cross sections is given. In addition, hollow circular and square CFST columns were tested. These test results supplement the limited published literature and validate the analytical formula.