Design and Full-Scale Testing of a Cast Steel Yielding Brace System in a Braced Frame
Publication: Journal of Structural Engineering
Volume 143, Issue 4
Abstract
The yielding brace system (YBS) is a seismic-resistant concentrically braced frame system that provides a fully symmetric hysteretic response via flexural yielding of cast steel triangular yielding fingers of a specially designed yielding connector. The behavior of the system is first reviewed, and a detailed discussion of the limit states design of a YBS braced frame is presented. Results of two full-scale yielding connector prototype tests, conducted in a braced frame configuration, are then presented. The test specimens were subjected to several quasi-static and dynamic load cycles, up to axial brace deformations of 120 mm (3.8% interstory drift). The proposed design limit states were validated through full-scale testing and the performance of a YBS yielding connector brace assembly in a typical braced frame with a bolted brace-to-gusset connection was demonstrated to be very similar to the performance of YBS yielding connectors tested in a purely axial configuration.
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Acknowledgments
The financial support of the Natural Sciences and Engineering Research Council of Canada (NSERC), the Steel Structures Education Foundation, and the Ontario Research Commercialization Program is gratefully acknowledged, as is the technical support and collaboration of Cast Connex Corporation.
References
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ASTM. (2015). “Standard specification for high strength structural bolts, steel and alloy steel, heat treated, 120 ksi (830 Mpa) and 150 ksi (1040 Mpa) minimum tensile strength, inch and metric dimensions.”, West Conshohocken, PA.
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Information
Published In
Journal of Structural Engineering
Volume 143 • Issue 4 • April 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Aug 4, 2015
Accepted: Sep 8, 2016
Published online: Nov 16, 2016
Published in print: Apr 1, 2017
Discussion open until: Apr 16, 2017
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