Influence of Slenderness on the Behavior of a FRP-Encased Steel-Concrete Composite Column
Publication: Journal of Composites for Construction
Volume 16, Issue 1
Abstract
The compressive behavior of a steel-concrete composite column encased in a fiber reinforced polymer (FRP) tube is evaluated experimentally for columns with various slenderness ratios. The composite column consists of a FRP tube surrounding a steel I-section that is subsequently filled with concrete. A total of nine column specimens were tested ranging between 500 and 3,000 mm in height. Confinement and composite action resulted in enhanced compressive behavior of the composite columns. Maximum confinement occurred in the short column (slenderness ratio less than 0.2). Confinement action reduced with increased height of the column specimens. The column load- carrying capacity, ultimate axial strain, and compressive strength of the confined concrete core in the longest specimen (slenderness ratio of 0.9) were reduced to approximately 59, 14, and 51% of the short column values, respectively. A buckling strength curve of the composite columns was developed on the basis of the experimental results.
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Acknowledgments
This study was carried out as part of ongoing research at McMaster Univ. Centre for Effective Design of Structures funded through Ontario Research and Development Challenge Fund of the Ministry of Research and Innovation. Funding was also provided by Natural Sciences and Engineering Research Council of Canada (NSERC). The authors would also like to gratefully acknowledge Walters Inc. for their support in the construction of the test setup.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 16 • Issue 1 • February 2012
Pages: 100 - 109
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Oct 27, 2010
Accepted: Jun 14, 2011
Published in print: Feb 1, 2012
Published online: Apr 27, 2012
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