Damage Control of Composite Steel Beams Using Flexible Gel-Covered Studs
Publication: Journal of Structural Engineering
Volume 146, Issue 3
Abstract
This paper proposes flexible-gel-covered (FGC) studs to reduce the seismic damage of a concrete floor slab in a steel frame. Flexible gel strips intentionally release the shear constraint between the slabs and the steel beams. To evaluate the effectiveness of the proposed FGC studs, a proof-of-concept test was conducted. Three beam-column connection specimens with different shear-constraint configurations were designed and quasistatically tested according to a seismic loading protocol. The load-deformation relationship, crack development, and other results were obtained and indicated that the slab cracking and beam strain were reduced, whereas the initial stiffness and load-carrying capacity also slightly decreased. The results are promising but not satisfactory, and the current design still requires extensive floor slab repair after a large earthquake. Thus, the appropriate shape and configuration of the FGC stud must be further investigated. Based on the test results, a sophisticated finite-element numerical model was developed using widely used commercial finite-element computer software, and could reproduce the hysteresis behavior, including the beam-end fracture. Finally, parametric analyses were conducted to obtain the desirable shear-constraint behavior.
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Acknowledgments
This work was supported by the Japanese Society for the Promotion of Science under Grant No. P17377, Sichuan Science and Technology Program under Grant No. 2019YFH0139, and National Natural Science Foundation of China under Grant No. 51708466.
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Published In
Journal of Structural Engineering
Volume 146 • Issue 3 • March 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Feb 26, 2019
Accepted: Jul 18, 2019
Published online: Dec 20, 2019
Published in print: Mar 1, 2020
Discussion open until: May 20, 2020
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