Long-Term Behavior and Strength of Partially Encased Composite Columns Made with Built-Up Steel Shapes
Publication: Journal of Structural Engineering
Volume 129, Issue 2
Abstract
A comprehensive study has been conducted to investigate the long-term behavior and strength of partially encased composite columns made with thin-walled welded I sections stiffened with transverse links. The paper presents the strain measurement history and load deformation response of five and two stub-column specimens. Four specimens were loaded for 150 days, following a typical construction sequence, and five columns were tested up to failure. Long-term axial deformations due to shrinkage and creep of the concrete were recorded and are compared to prediction models. The tests showed that the relatively higher stresses in the steel shape due to the sequence of loading and shrinkage and creep of the concrete had no significant effect on the failure mode and ultimate capacity for this type of column. The transverse stresses in the web of the steel shape were lower in specimens subjected to long-term loading. The axial stresses in the transverse links at peak load, caused by the transverse expansion of the concrete, were found not to depend on the loading sequence.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 129 • Issue 2 • February 2003
Pages: 141 - 150
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Feb 23, 2001
Accepted: May 3, 2002
Published online: Jan 15, 2003
Published in print: Feb 2003
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