Confined Concrete-Filled Tubular Columns
Publication: Journal of Structural Engineering
Volume 131, Issue 3
Abstract
This paper presents a study to introduce and experimentally validate an innovative concrete filled steel tubular (CFT) column system, named as confined CFT or CCFT, for improved seismic design of steel and concrete composite structures. Based on fundamental mechanics, the concept is aimed at controlling the local buckling of the steel tube and confining the concrete in the potential plastic hinge regions of a CFT column. To achieve this, several efficient details of transverse confinement are proposed. In the first phase of the study, carbon-fiber-reinforced plastic as additional confinement of CCFT columns was examined through experimental testing. As demonstrated from the results of axial compression tests and seismic loading tests, the new type of CFT column system can provide excellent seismic performance. The complicated local buckling and confinement mechanisms were examined using a proposed simple analytical model.
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Acknowledgments
The axial compression tests conducted in this study were made possible at the Structural Laboratory at the University of Southern California (USC), with the donation of materials from the Fyfe Co., California, and SAERTEX, Co., Germany. Main support for the seismic tests conducted at the Structural Laboratory at the Hunan University (HNU) was provided by the Cheung Kong Scholarship awarded to the first writer. Supplemental supports were also provided by the NSF China and the Hunan Provincial Science and Technology Bureau. The writers would like to thank the following gentlemen for their help at various stages during the study: Mr. Hui Wu and Mr. L. Hill of USC; Professor Weijian Yi, Professor Shouping Shang, Professor Yijiang Liu, Professor Yurong Guo, Mr. Bo Shan, Mr. Guowei Zhang, Mr. Weifeng Mao, and Mr. Yuntian Wu of HNU.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 131 • Issue 3 • March 2005
Pages: 488 - 497
Copyright
© 2005 ASCE.
History
Received: Nov 26, 2003
Accepted: May 21, 2004
Published online: Mar 1, 2005
Published in print: Mar 2005
Notes
Note. Associate Editor: Sashi K. Kunnath
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