ISO Standard Fire Tests of Concrete-Filled Steel Tube Columns with Solid Steel Core
Publication: Journal of Structural Engineering
Volume 143, Issue 4
Abstract
Concrete-filled steel tube columns with solid steel core are prefabricated innovative composite columns that are especially designed to achieve high fire resistance, even with high slenderness ratios and load levels. These features make them architecturally and economically appealing for use in high-rise buildings. Conceptually, their exceptional structural fire behavior is attributed to a process of gradual load redistribution to the solid steel core during fire that is thermally protected by the concrete infill. In this paper the results of a series of four ISO fire tests with concrete-filled steel tube columns with solid steel core of three different cross-sectional types and two different end conditions are presented. This novel experimental database for this type of composite column (1) validates the concept of their structural fire behavior; and (2) shows that, without additional fire protection, extraordinary fire resistance of almost 180 min can be achieved with common slenderness and load ratios with respect to building practice.
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Acknowledgments
The authors gratefully acknowledge the manufacture and provision of the test specimens by Tuchschmid AG, Frauenfeld, Switzerland, as well as assistance in equipping the specimens with thermocouples.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 143 • Issue 4 • April 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Mar 24, 2016
Accepted: Sep 11, 2016
Published online: Nov 16, 2016
Published in print: Apr 1, 2017
Discussion open until: Apr 16, 2017
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