Experimental Evaluation of a Rocking Damage-Free Steel Column Base with Friction Devices
Publication: Journal of Structural Engineering
Volume 146, Issue 10
Abstract
This paper presents the experimental evaluation of an earthquake-resilient rocking damage-free steel column base, previously proposed and numerically investigated by the authors. The column base uses post-tensioned high-strength steel bars to control its rocking behavior, and friction devices to dissipate seismic energy. It is equipped with a circular steel plate with rounded edges, which is used as a rocking base. The rounded edges prevent stress concentration and damage of the contact surfaces, whereas the circular shape allows rocking toward all plan directions. In contrast to conventional steel column bases, the proposed column base exhibits monotonic and cyclic moment–rotation behaviors that are easily described by analytical equations. This allows the definition of a step-by-step design procedure which ensures damage-free behavior, self-centering capability, and energy dissipation capacity for a target design base rotation. The experimental tests, presented in this study, were conducted under monotonic and cyclic loads demonstrating the damage-free behavior even under large rotations. The experimental results were used to validate the design procedure and to calibrate refined three-dimensional (3D) nonlinear finite-element models that will allow further investigations.
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Data Availability Statement
All data, models, or code generated or used during the study are available from the corresponding author by request.
Acknowledgments
This research is supported by Marie Sklodowska-Curie Action Fellowships within the H2020 European Programme. Any opinions, findings, and conclusions or recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of the European Commission. The authors also gratefully acknowledge the support of Prof. J. Toby Mottram and the work of the technicians of the Structural Testing Laboratory of the University of Warwick: Taylor Arnett and Neil Gillespie.
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Published In
Journal of Structural Engineering
Volume 146 • Issue 10 • October 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Aug 26, 2019
Accepted: Apr 15, 2020
Published online: Jul 28, 2020
Published in print: Oct 1, 2020
Discussion open until: Dec 28, 2020
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