Techno Press
Techno Press

Steel and Composite Structures   Volume 4, Number 1, February 2004, pages 1-8
Failure of lightweight aggregate concrete-filled steel tubular columns
Shehdeh Ghannam, Yahia Abdel Jawad and Yasser Hunait

Abstract     [Full Text]
    Tests on steel tubular columns of square, rectangular and circular section filled with normal and lightweight aggregate concrete were conducted to investigate the failure modes of such composite columns. Thirty-six full scale columns filled with lightweight and normal weight aggregate concrete, eighteen specimens for each, were tested under axial loads. Nine hollow steel sections of similar specimens were also tested and results were compared to those of filled sections. The test results were illustrated by a number of load-deflection and axial deformation curves. The results showed that both types of filled columns failed due to overall buckling, while hollow steel columns failed due to bulging at their ends (local buckling). According to the above-mentioned results, and due to low specific gravity and thermal conductivity of the lightweight concrete the further interest should be concentrated in replacing the normal concrete by the lightweight aggregate concrete.
Key Words
    deformation; deflection; composite columns; steel columns; tubular columns; lightweight concrete; normal concrete; local buckling; overall buckling.
Shehdeh GhannamrnWadi Seer Engineering College, Balqa

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