Flexural Behavior of Concrete-Filled Circular Steel Tubes under High-Strain Rate Impact Loading
Publication: Journal of Structural Engineering
Volume 138, Issue 3
Abstract
Nine simply supported circular steel concrete-filled tubes (CFTs), two circular steel posttensioned concrete-filled tubes (PTCFTs), and one circular steel fiber–reinforced concrete-filled tube (FRCFT) have been tested in an instrumented drop-weight impact facility. The weight and the height of the drop-weight were varied to cause failure in some test specimens. The failure modes and local damages in those specimens have been investigated extensively. Failure in the steel tubes was commonly tensile facture or rupture along the circumference. Concrete core in the impact area commonly crushed under compression and cracked under tension. The use of prestressing strands and steel fibers significantly restrained the concrete tension cracks in the PTCFT and FRCFT specimens, respectively. The experimental results are analyzed in the context of principles of energy and momentum conservation.
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Acknowledgments
The research was conducted under the collaboration between the University of Nebraska–Lincoln and the Hunan University of China. Tests described in this paper were conducted at the Ministry of Education Key Laboratory of Building Safety and Efficiency, the Center for Integrated Protection Research of Engineering Structures (CIPRES) at the Hunan University. The authors wish to thank Boshen Chen for his timely assistance in conducting the impact tests. Partial support for this project was provided by the visiting professorship at the Hunan University. The financial support from the China Scholarship Council is also gratefully acknowledged.
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Information
Published In
Journal of Structural Engineering
Volume 138 • Issue 3 • March 2012
Pages: 449 - 456
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Oct 22, 2009
Accepted: Jun 15, 2011
Published online: Sep 16, 2011
Published in print: Mar 1, 2012
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