Novel Framework for Vibration Serviceability Assessment of Stadium Grandstands Considering Durations of Vibrations
Publication: Journal of Structural Engineering
Volume 144, Issue 2
Abstract
Annoying vibrations in grandstand structures have been receiving more attention due to the increasing slenderness of the architectural components and the complexity of the crowd loading for engineers. The vibration serviceability checks under these conditions become a challenge in the design and operation stages. Regarding human comfort, excessive vibrations due to occupant activities may affect comfort and/or cause panic, especially for passive occupants who do not participate in generating excitations. Although durations of excessive vibrations have been considered as one of the most important factors affecting occupant comfort, incorporating the vibration duration in the occupant comfort analysis has not been addressed yet. In addition, the currently available approaches using raw acceleration, weighted RMS acceleration, vibration dose values (VDV), and so on may not always be sufficient for serviceability assessment due to the lack of guided procedure for calculating the integration time and implementing the duration of vibration into the process. Therefore this study proposes a new parameter and framework for assessing human comfort which incorporates the duration of vibration with conventional data processing. The aim is to better examine vibration levels and the corresponding occupant response focusing on grandstand structures. A new parameter, the area of RMS (ARMS), is introduced using the running RMS values of acceleration weighted by the frequency weighting functions. Furthermore, perception ranges for human comfort levels based on the proposed parameter are presented. The experimental study reveals that the proposed framework can successfully address the impact of duration time on determining the levels of vibrations and comfort using the proposed parameter.
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Acknowledgments
The financial support for this research was provided by Qatar National Research Fund (QNRF; a member of the Qatar Foundation) via the National Priorities Research Program (NPRP), Project Number NPRP 6-526-2-218. The statements made herein are solely the responsibility of the authors.
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Published In
Journal of Structural Engineering
Volume 144 • Issue 2 • February 2018
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jan 17, 2017
Accepted: Jul 13, 2017
Published online: Dec 14, 2017
Published in print: Feb 1, 2018
Discussion open until: May 14, 2018
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