Effects of Sustained Load on Concrete-Filled Hollow Structural Steel Columns
Publication: Journal of Structural Engineering
Volume 130, Issue 9
Abstract
The use of concrete-filled hollow structural steel (HSS) columns has become widespread in the past few decades. However, these members are subject to static long-term behaviors under sustained loading, a common phenomenon in concrete structures. Such a problem has not been addressed satisfactorily by design codes. The present study is an attempt to predict the time-dependent behavior of concrete-filled HSS columns by means of a model that is proposed by ACI 209R-92. Tests on the behavior of concrete-filled HSS columns with square sections under long-term sustained loading are performed, in addition to proposing further tests on the static ultimate strength of the composite columns. A theoretical model of analysis to account for shrinkage and creep effects on concrete-filled HSS columns under sustained loading is presented. A comparison of results calculated using this model shows good agreement with test results. Finally, formulas for the calculation of the ultimate strength of the concrete-filled HSS columns subjected to long-term sustained loads are presented.
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Information
Published In
Journal of Structural Engineering
Volume 130 • Issue 9 • September 2004
Pages: 1392 - 1404
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: May 7, 2002
Accepted: Nov 3, 2003
Published online: Aug 16, 2004
Published in print: Sep 2004
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