Eccentric Axial Load Test for High-Strength Composite Columns of Various Sectional Configurations
Publication: Journal of Structural Engineering
Volume 143, Issue 8
Abstract
Composite columns of various sectional configurations are studied to maximize the contribution of high-strength steel under compression-flexural loading. For concrete-encased steel (CES) columns, steel angles were placed at four corners of the cross-section and connected by various types of transverse reinforcements. In the case of a concrete-filled steel tube (CFT) column, a slender steel tube was stiffened by welding longitudinal bars. To verify structural capacities, eccentric axial load tests were performed for three concrete-encased steel angle (CES-A) columns and a stiffened concrete-filled slender steel tube (S-CFT) column, using Grade 800 MPa steel and 100 MPa concrete. The CES-A columns showed good structural performance in strength, flexural stiffness, and ductility due to the high contribution and good confinement effect of the corner steel angles and transverse reinforcement. In the S-CFT column the welded longitudinal bars successfully restrained local buckling of the slender steel tube so that the full plastic strength of the composite section developed.
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Acknowledgments
This research was supported by grants from the High-Tech Urban Development Program (09 R&D A01) and R&D Policy Infra Program (Code 11-Technology Standardization-09-01), funded by the Ministry of Land, Transportation and Maritime Affairs of Korea, and the authors are grateful to the authorities for their support.
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Published In
Journal of Structural Engineering
Volume 143 • Issue 8 • August 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Aug 3, 2015
Accepted: Jan 13, 2017
Published online: Mar 29, 2017
Published in print: Aug 1, 2017
Discussion open until: Aug 29, 2017
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