Experimental Performance of RC Hollow Columns Confined with CFRP
Publication: Journal of Composites for Construction
Volume 11, Issue 1
Abstract
Column jacketing with fiber-reinforced polymer (FRP) composite materials has been extensively investigated in the last decade to address the issue of seismic upgrade and retrofit of existing reinforced concrete (RC) columns. Researchers have mainly focused their attention on solid columns, while very little research has been done on hollow columns strengthened with FRP. To study the behavior of noncircular hollow cross sections subjected to combined axial load and bending and to contribute to the comprehension of the resistant mechanisms present in FRP confinement, a total of seven specimens have been tested. The present work is the first step in a broader endeavor aimed at evaluating the benefits generated by a FRP wrapping, computing (P-M) interaction diagrams for hollow columns confined with FRP, and defining design criteria for the strengthening of these elements using composite jackets. The theoretical analyses will also assess under which conditions the standard approaches for columns with solid cross sections could be extended to the case of hollow columns.
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Acknowledgments
The writers would like to gratefully acknowledge the support of the Italian government in its funding of the research project M.I.TRAS. The FRP strengthening of the columns was supported by MAPEI Spa., Milan, Italy. The contribution of Messrs. Balsamo and Zaffaroni is acknowledged.
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© 2007 ASCE.
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Received: Aug 4, 2005
Accepted: Apr 19, 2006
Published online: Feb 1, 2007
Published in print: Feb 2007
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