Human-Induced Vibrations of Footbridges: The Effect of Vertical Human-Structure Interaction

被引：11
作者：
Van Nimmen, Katrien [1 ,2 ]
Lombaert, Geert [3 ]
De Roeck, Guido [3 ]
Van den Broeck, Peter [1 ,2 ]
机构：
[1] Katholieke Univ Leuven, Dept Civil Engn Struct Mech, B-3001 Louvain, Belgium
[2] Katholieke Univ Leuven, Dept Civil Engn Technol Cluster Construct, Struct Mech & Bldg Mat Sect, Technol Campus Ghent, Ghent, Belgium
[3] Katholieke Univ Leuven, Dept Civil Engn Struct Mech, B-3001 Louvain, Belgium
来源：
DYNAMICS OF COUPLED STRUCTURES, VOL 4, 34TH IMAC | 2016年
关键词：
Human-induced vibrations; Footbridge; Human-structure interaction; Vibration serviceability;
D O I：
10.1007/978-3-319-29763-7_29
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Slender and lightweight structures are often unduly responsive to human excitation. The concerns of vibration comfort and safety are strengthened by unexplored human-structure interaction (HSI) phenomena. The present contribution proposes a numerical model for pedestrian excitation including HSI. In addition to the well-known forces induced by a pedestrian on a rigid floor, the pedestrian is represented by a linear mechanical model to simulate the interaction with the supporting structure. Inspired by the body postures assumed during the walking cycle, the mechanical properties are chosen to represent the dynamic behaviour of the human body with one or two legs slightly bent. The effect of HSI on the structural response is evaluated for various footbridge parameters and pedestrian densities. It is shown that by taking into account HSI, the structural response is reduced. Furthermore, it is demonstrated that the unrealistic high acceleration levels as predicted by simplified force models are not reached as the result of HSI. It is concluded that the mechanical interaction with the crowd is relevant for the vertical low-frequency dynamic behaviour of footbridges.
引用
收藏
页码：299 / 307
页数：9
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