Abstract: This paper introduces the mechanism of the compressive concrete filled tube, calculates and analyses the formula of the ultimate bearing capacity of concrete filled tube considering the effect of concrete which is bound on the outside. Finauy, it illustrates that concrete filled tube is effective for reducing the height of girder and shows that the excellent charateristic of concrete filled tube can be transplanted to shallow girder to develop the field of achieving the low-height girder extensively.

Key words: concrete filled tube, low-height girder

摘要： 本文介绍了钢管混凝土的受力机理,推导并分析了考虑外包混凝土作用的钢管混凝土极限承载力公式,最后用实例说明钢管混凝土对降低梁高的有效性,建议可将钢管混凝土的良好特性移植到低高度梁中以广泛开拓实现低高度梁的途径。

关键词: 钢管混凝土, 低高度梁