中国高层建筑中钢管混凝土柱的应用与展望

Application and future perspective of concrete fill steel tube column in tall buildings

近十余年来,我国高层建筑发展迅速,规模越来越大,高度越来越高。建筑高度的增加造成重力荷载越来越大,使结构的竖向构件,特别是柱子的截面越来越大。为了解决这一问题,在设计高度较大的高层建筑时采用了钢管混凝土柱。钢管混凝土柱中的混凝土被钢管包围而受约束,处于三向受力状态,与钢管共同工作,具有很强的抗压能力,因而柱截面可以大大缩小,效果显著。随着应用的增多,应用的方式亦趋于多样化。以作者对钢管混凝土柱的设计实践及收集到的有关资料,对目前的使用情况作扼要的介绍,并展望今后的发展,供参考。

In the recent ten years, the high rise buildings in our country developed rapidly. The buildings become huger and huger, taller and taller. As the height of the building increase, the load increases, and the vertical member, especially the column sizes, become bigger and bigger. To address this problem, concrete fill tube （CFT） steel columns are used in some higher buildings. Due to the core concrete is constrained by the steel pipe, it is in triaxial compress status. The strength-increased concrete and the steel pipe are working together and CFTs gain much high overall compress strengthens, therefore the column sizes can be designed substantial small. Also the application methods tend to versatile as the usages of the CFT increase. The application of the CFT in structural design, its relevant information we collected and its current usage status are introduced briefly. Its future development is prospected, which can be referenced by other colleagues.