Vibration Behavior and Serviceability of Arched Prestressed Concrete Truss Due to Human Activity
Y. Frank Chen
|Published in:||International Journal of Structural Stability and Dynamics, November 2018, n. 12, v. 18|
The current trend toward longer spans and lighter floor systems, combined with reduced damping and new activities, have resulted in an increasing complaints on floor vibration from building owners and occupants. Heel-drop, jumping, and walking impacts, which may lead to discomfort problems in daily life, were imposed on a large-span arched prestressed concrete truss (APT) girder system studied. The natural frequencies, peak acceleration, average root-mean-square acceleration (ARMS), maximum transient vibration value (MTVV), and perception factor for the girder were obtained and checked against the existing codes and standards. The purpose of this paper is to provide researchers and engineers with a detailed evaluation on the vibration behavior of the APT girder under different human activities, with a comprehensive review on the relevant criteria and some suggestions. Lastly, the following threshold peak accelerations are suggested: 650[Formula: see text]mm/s² for transient heel-drop impact, 1450[Formula: see text]mm/s² for transient jumping impact, and 250[Formula: see text]mm/s² for steady-state walking. In addition, the threshold values of 90[Formula: see text]mm/s² and 50[Formula: see text]mm/s² are suggested for MTVV and ARMS, respectively, under steady-state walking.
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