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Spectral Model for Crowd Walking Load
| 题名： | Spectral Model for Crowd Walking Load |
| 正文语种： | 英文 |
| 作者： | Jinping Wang; Jun Chen; Yutaka Yokoyama;Jiecheng Xiong |
| 作者单位： | Tongji Univ;Tokyo Institute of Technology |
| 关键词： | Crowd walking load; Spectrum method; Stochastic vibrations; Vibration serviceability |
| 摘要： | Crowd walking is a common daily activity that can cause large vibrations on slender structures such as footbridges and long-span floors. Although modeling of crowd walking loads is critical in structural response prediction, this type of modeling is considered difficult due to the randomness in pedestrian walking gaits, temporal-spatial variation of walking procedures, and technical difficulties in crowd walking experiments. The authors developed a spectral model for crowd walking. First, the auto-power spectral density (PSD) function of an individual was adopted from a previous study. Inspired by research in earthquake engineering, the cross-power spectral density of every two persons in a crowd was developed, consisting of coherence functions and auto-PSDs. Coherence function parameters were proposed separately from experimental records for three pedestrian densities: unrestricted, restricted, and exceptionally restricted traffic conditions. After obtaining a PSD matrix for crowd walking, the structural responses could be predicted by the stochastic vibration theory. The feasibility of the model was verified by comparing the measured responses of a model footbridge with the prediction responses from the proposed spectral model. |
| 出版日期： | 2020 |
| 出版年： | 2020 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.146 |
| 期： | No.03 |
| 页码： | 04019220 |
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