Concrete-Filled Steel Tube Columns Encased with Thin Precast Concrete
Publication: Journal of Structural Engineering
Volume 141, Issue 12
Abstract
An experimental study was performed to investigate the axial-flexural load-carrying capacity of concrete-filled steel tube columns encased with thin precast concrete (PC). Six eccentrically loaded columns and one concentrically loaded column were tested. To prevent the premature failure of the concrete encasement, various reinforcement details such as studs, steel fiber, welded wire mesh, and cross ties were used. The maximum axial loads of the specimens agreed with the strengths predicted by current design codes, although in some specimens, the load-carrying capacity decreased immediately after the peak strength owing to early spalling of the concrete encasement. On the basis of the test results, the use of fiber-reinforced concrete is recommended to increase the ductility of columns by restraining the spalling of the concrete encasement.
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Acknowledgments
This research was financially supported by Shinsegae E&C. Authors are also grateful to grants from the High-Tech Urban Development Program (09 R&D A01) and the R&D Policy Infra Program (Code 11-Technology Standardization-09-01), funded by the Ministry of Land, Infrastructure, and Transport (MOLIT) of the Korean Government.
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Published In
Journal of Structural Engineering
Volume 141 • Issue 12 • December 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jul 17, 2014
Accepted: Feb 4, 2015
Published online: Apr 6, 2015
Discussion open until: Sep 6, 2015
Published in print: Dec 1, 2015
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