Experimental and Numerical Study of Postbuckling Ductile Fracture of Heat-Treated SHS Stub Columns
Publication: Journal of Structural Engineering
Volume 140, Issue 7
Abstract
Previous studies have proposed a cyclic ductile fracture model by applying the void growth model and an established rule in incremental form, in which only a monotonic tensile coupon test is required to calibrate the parameters of the fracture model and the corresponding plasticity models. The model parameters were deduced from small-scale hourglass steel coupons, but not from large-scale specimens. In practice, however, ductile fracture after the occurrence of local buckling has been observed in steel members during recent huge earthquakes. This paper aims to establish a simulation method for the postbuckling cracking process on the basis of formerly proposed fracture and plasticity models. Experimental results demonstrate that the ultimate behaviors of heat-treated square hollow section (SHS) stub columns associated with plate buckling and ductile fracture under cyclic loading can be simulated with favorable accuracy.
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Acknowledgments
The research reported herein was sponsored by the Ministry of Education under the Grant-in-Aid for Scientific Research (A) No. 23246097 with the title “Study on the coupling of buckling and fracture of steel structural members.” This financial support is sincerely acknowledged. The experimental support by Prof. Iyama and Mr. Araki are greatly appreciated.
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Published In
Journal of Structural Engineering
Volume 140 • Issue 7 • July 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Oct 14, 2013
Accepted: Feb 20, 2014
Published online: Apr 3, 2014
Published in print: Jul 1, 2014
Discussion open until: Sep 3, 2014
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