Techno Press
Techno Press

Steel and Composite Structures   Volume 8, Number 4, August 2008, pages 297-312
Concrete filled double skin tubular members subjected to bending
Kojiro Uenaka, Hiroaki Kitoh and Keiichiro Sonoda

Abstract     [Full Text]
    A concrete filled double skin tubular (called CFDST in abbreviation) member consists of two concentric circular steel tubes and filled concrete between them. Purpose of this study is to investigate their bending characteristics experimentally. The two test parameters of the tubes considered were an inner-to-outer diameter ratio and a thickness-diameter ratio. As a result, their observed failure modes were controlled by tensile cracking or local buckling of the outer tube. Discussion is focused on the confinement effect on the filled concrete due to the both tubes and also the influence of the inner-to-outer diameter ratios on their deformability and load carrying capacity.
Key Words
    composite columns; concrete filled double tubular steel member; bending moment capacity; confined effect.
Kojiro Uenaka : Dept. of Civil Engineering, Kobe City College of Technology Gakuenhigashimachi 8-3,
Nishi, Kobe, 651-2194, Japan
Hiroaki Kitoh : Dept. of Urban Engineering, Osaka City University, Japan
Keiichiro Sonoda : Professor, Emeritus Osaka City University, Japan

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