Cyclic Behavior of Shear Links of Various Grades of Plate Steel
Publication: Journal of Structural Engineering
Volume 136, Issue 4
Abstract
Plate steel shear links offer enhanced design freedom, including the ability to use steel grades that are not available in rolled shapes. This paper discusses the cyclic response of five types of shear links designed using steel grades that ranged from 485 to 100 MPa yield strength. The design and subsequent performance was categorized into two groups; conventional design and those designed without stiffeners using low yield point steels. Ductile failure modes and desirable hysteretic behavior that resulted in efficient cyclic energy dissipation were observed for all specimens. The links designed without stiffeners using low yield point steel reached shear deformations exceeding 0.20 rad, outperforming the conventional designs that exhibited approximately 0.12 rad capacity. The enhanced performance was the result of shifting the failure mode by excluding intermediate stiffeners and providing low web compactness. This combination eliminated welding and decreased measured plastic strain demands on the face of the inelastically deforming webs.
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Acknowledgments
This research was funded by the California Department of Transportation (Caltrans) via the toll bridge retrofit program through the University of California, San Diego and the Federal Highway Administration through the Highway Project at the MCEER Center at the State University of New York at Buffalo. Donations of high performance steel from Oregon Steel Mills in Portland, Oregon, and low yield point steel from Nippon, Japan, are gratefully acknowledged.
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© 2010 ASCE.
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Received: Feb 2, 2009
Accepted: Aug 24, 2009
Published online: Oct 8, 2009
Published in print: Apr 2010
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