Torsional Behavior of Concrete-Filled Circular Steel Tube Columns
Publication: Journal of Structural Engineering
Volume 135, Issue 10
Abstract
Concrete-filled tubes (CFTs) are columns commonly used in high-rise building construction due to their structural effectiveness. Past studies on CFT have focused primarily on uniaxial compression, bending, and eccentric compression and a few investigations have studied member behavior under combined compression and torsion. In this paper, the behavior of a circular CFT column under combined torsion and compression was theoretically investigated considering the confinement effect of the steel tube, softening of concrete, and spiral effects. Biaxial stress effects due to diagonal cracking were also considered. By incorporating these factors into the compatibility and equilibrium conditions, a basic equation to describe the torsional behavior of the entire loading history of CFT members was derived.
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Acknowledgments
This research was supported by a Grant No. UNSPECIFIED07UrbanRenaissanceB03 from High-Tech Urban Development Program funded by the Ministry of Construction and Transportation of Korean Government. The financial support is gratefully acknowledged.
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Information
Published In
Journal of Structural Engineering
Volume 135 • Issue 10 • October 2009
Pages: 1250 - 1258
Copyright
© 2009 ASCE.
History
Received: Jul 11, 2007
Accepted: May 19, 2009
Published online: Sep 15, 2009
Published in print: Oct 2009
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