Optimum Coefficient of Friction in FPS for Base Isolation of Building Frames
Publication: Practice Periodical on Structural Design and Construction
Volume 27, Issue 4
Abstract
Base isolation of structures with a friction pendulum system (FPS) has been a topic of great interest for research in the past. The efficiency of the FPS system in isolating a structure depends upon a number of crucial parameters, of which the coefficient of friction plays the most important role. Herein, two methods are presented for determining the optimum value of the dynamic coefficient of friction (), which provides the maximum possible reduction of significant engineering demand parameters (EDP) simultaneously. The optimum value of and the percentage of reduction of EDPs are obtained with respect to the safety gap. The procedures for determining the optimum value of are illustrated with an example of a 10-story building frame base isolated with FPS under both far-field and near-field earthquakes. The results of the study show that the reduction in the number of plastic hinges formed was highly sensitive to the variation of the coefficient of friction: reductions in other EDPs showed mild to moderate sensitivity.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
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Practice Periodical on Structural Design and Construction
Volume 27 • Issue 4 • November 2022
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© 2022 American Society of Civil Engineers.
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Received: Nov 29, 2021
Accepted: Apr 19, 2022
Published online: Jul 7, 2022
Published in print: Nov 1, 2022
Discussion open until: Dec 7, 2022
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- A. R. Avinash, A. Krishnamoorthy, Kiran Kamath, M. Chaithra, Sliding Isolation Systems: Historical Review, Modeling Techniques, and the Contemporary Trends, Buildings, 10.3390/buildings12111997, 12, 11, (1997), (2022).