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http://dx.doi.org/10.7781/kjoss.2012.24.4.451

Limitations on the Width-to-Thickness Ratio of Rectangular Concrete-Filled Tubular (CFT) Columns  

Choi, Young-Hwan (서울시립대학교 건축공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.24, no.4, 2012 , pp. 451-458 More about this Journal
Abstract
The concrete-filled steel tube (CFT) that has an excellent performance can be more economically used when the steel tube has a large width-to-thickness ratio. However, the international provisions such as American Institute of Steel Construction (AISC) limit the use of a slender plate in CFT members, resulting in a less optimal use of CFT. This study verifies the post buckling strength of CFT columns through the experimental program for Hollow Steel Sections (HSS) and CFTs with a with-to-thickness ratio ranged 60 to 100. The study also proposes a relaxed limitations of with-to-thickness ratio compared to the one specified in the current standards.
Keywords
concrete filled tube; CFT; global bucking; local buckling; width-to-thickness ratio; post buckling strength;
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