Low-Cycle Fatigue Testing of Shear Links and Calibration of a Damage Law
Publication: Journal of Structural Engineering
Volume 144, Issue 10
Abstract
This paper experimentally studies the low-cycle fatigue (LCF) behavior of shear links in eccentrically braced frames (EBFs) with the aim of calibrating a convenient damage law for estimating the exhausted as well as remaining life of these members under any loading history. A total of 14 specimens are tested using a nearly full-scale EBF setup under constant-amplitude cycles as well as proportional and arbitrary loading histories. A generalized damage law is subsequently calibrated using results of the present study as well as a comprehensive data compilation of previous experiments for predicting the occurrence of link fracture under earthquake-induced loading histories. The approach forms a basis for the development of acceptance criteria based on cumulative measures which can be incorporated into the current performance-based design and evaluation procedures. For further validation, the procedure is applied to the case of EBF links fractured during the Christchurch earthquakes. Finally, the current standards for EBF shear links are discussed based on the findings of the LCF tests.
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Acknowledgments
The study was supported by the Scientific and Technological Research Council of Turkey (TÜBİTAK) through Grant No. 114M251 and by the College of Engineering of Middle East Technical University through Grant No. BAP-03-03-2017-004.
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Published In
Journal of Structural Engineering
Volume 144 • Issue 10 • October 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jul 4, 2017
Accepted: May 4, 2018
Published online: Jul 30, 2018
Published in print: Oct 1, 2018
Discussion open until: Dec 30, 2018
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