Investigation of a vibration mitigation method based on crowd flow control on a footbridge

doi:10.1016/j.istruc.2021.05.034

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Investigation of a vibration mitigation method based on crowd flow control on a footbridge
	Zhu, Qiankun 1,2; Yang, Wenbin 1; Du, Yongfeng 1,2; Zivanovic, Stana 3
刊名	STRUCTURES
	2021-10
卷号	33 页码:1495-1509
关键词	Footbridge Social force model Crowd flow control Human-induced vibration Vibration mitigation mechanism Input energy
ISSN号	2352-0124
DOI	10.1016/j.istruc.2021.05.034
英文摘要	The vibration mitigation method based on crowd flow control is verified by comparing the numerical and experimental results of its damping performance. The pedestrian characteristics are simulated with the upgraded social force model to include the effects of obstacles on pedestrian commute in a blocking scenario. The coupling system's control equation is established by loading a mass-spring-damping (MSD) model on the structure and the crowd-footbridge vertical interaction is analyzed. In this regard, a large-span interior footbridge in a shopping mall was analyzed, which had been presented in a previous study. The numerical vibration mitigation efficiency of the crowd motion control to different loading conditions is compared to the experimental results of a laboratory footbridge and the percentage of maximum numerical error is 16.7%. The vibration mitigation mechanism is described from the energy perspective. The numerical results were found consistent with the experimental data, and the pedestrian motion data in the simulation environment has enough reliability. It was found that choosing the location of obstacles can effectively help mitigate the vibration of the system. The relationship between the vibration mitigation rates, the number of obstacles, and the pedestrian densities were statistically analyzed to discuss the crowd control system's performance. The analyses demonstrate that the mitigation rate is directly affected by the number of obstacles in a specific crowd density range. It can be concluded that the mitigation performance of the hybrid mitigation method with Layout 1 is significantly more effective than Layout 2 at high pedestrian density.
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000701928400003
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148828]
专题	土木工程学院
作者单位	1.Lanzhou Univ Technol, Inst Earthquake Protect & Disaster Mitigat, Lanzhou 730050, Peoples R China; 2.Lanzhou Univ Technol, Western Ctr Disaster Mitigat Civil Engn, Minist Educ, Lanzhou 730050, Peoples R China; 3.Univ Exeter, Coll Engn Math & Phys Sci, North Pk Rd, Exeter EX4 4QF, Devon, England
推荐引用方式 GB/T 7714	Zhu, Qiankun,Yang, Wenbin,Du, Yongfeng,et al. Investigation of a vibration mitigation method based on crowd flow control on a footbridge[J]. STRUCTURES,2021,33:1495-1509.
APA	Zhu, Qiankun,Yang, Wenbin,Du, Yongfeng,&Zivanovic, Stana.(2021).Investigation of a vibration mitigation method based on crowd flow control on a footbridge.STRUCTURES,33,1495-1509.
MLA	Zhu, Qiankun,et al."Investigation of a vibration mitigation method based on crowd flow control on a footbridge".STRUCTURES 33(2021):1495-1509.