Benefit of Ultra-High Strength Infill in Concrete-Filled Steel Tubular Columns

Abstract:

Concrete filled steel tubes (CFST) represent a composite building member suitable especially for the construction of columns of a skeleton frame. Filling the steel tube with concrete allows the use of suitable properties of both materials and their interaction. This is very beneficial in a fire exposure, where a circular column has slightly better fire resistance than a square column. In case of an assessment of columns at the ultimate limit state (ULS), a buckling resistance decides. In previous research, it was found that increasing the strength of concrete increases buckling resistance only to a certain extent. The main aim of the article is to show through a theoretical study what benefit the use of ultra-high strength concrete has for buckling resistance of CFST.

• Periodical: Key Engineering Materials (Volume 898)
• Pages: 93-99
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.898.93
• Online since: August 2021
• Authors: Pavla Bukovská*, Marcela Karmazínová, Michal Štrba
• Keywords: Buckling Resistance, Concrete Filled Steel Tubes, Elastic Modulus, Global Stability, High Strength Concrete, Load Capacity, Slenderness

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