Effect of Horizontal-Vertical Coupling on the Seismic Performance of Unanchored Nonstructural Components in a Triple Friction Pendulum Base-Isolated Building
Publication: Journal of Structural Engineering
Volume 150, Issue 6
Abstract
The coupling behavior in the structural response caused by the multicomponents of ground motions in friction pendulum base-isolated buildings can change the response of nonstructural contents. This research investigates the seismic performance of freestanding nonstructural components in a hypothetical 4-story reinforced concrete triple friction pendulum (TFP) base-isolated medical facility using a suite of 11 ground-motion pairs, including their vertical components. Floor accelerations in vertical and horizontal directions were employed as excitation for the rocking response of rigid blocks. In comparison with the horizontal-only floor accelerations, the horizontal-vertical (H-V) coupling behavior in the floor accelerations had a substantial effect on the rocking response of nonstructural contents, small and slender ones in particular. Consequently, the direct effect of vertical ground motions and the H-V coupling phenomenon on the seismic performance of nonstructural components need to be carefully evaluated for critical facilities, especially the friction pendulum–type base-isolated buildings, to quantify the damage level of unanchored components.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors would like to express their sincere gratitude to the anonymous reviewers for their valuable comments and suggestions which helped to improve the quality of this study.
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Journal of Structural Engineering
Volume 150 • Issue 6 • June 2024
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© 2024 American Society of Civil Engineers.
History
Received: Jan 17, 2023
Accepted: Dec 22, 2023
Published online: Mar 30, 2024
Published in print: Jun 1, 2024
Discussion open until: Aug 30, 2024
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