KSCE Journal of Civil Engineering

, Volume 23, Issue 2, pp 754–762 | Cite as

Footbridge Serviceability Analysis: From System Identification to Tuned Mass Damper Implementation

  • Shiqiang Qin
  • Yun-Lai ZhouEmail author
  • Juntao Kang
Structural Engineering


Footbridges usually suffer from vibrations induced by the actions of pedestrians, which calls for various control measures to improve the serviceability. This study described the dynamic analysis and Tuned Mass Damper (TMD) implementation for a single-pylon cable-stayed footbridge scaled model, aimed at providing an experimental case study regarding of vibration control design of slender structures. A scaled model for the real footbridge was designed based on similarity principles. Then, the dynamic behavior of the footbridge was assessed by ambient vibration tests. The natural frequencies and mode shapes were identified from operational vibration measurements by covariance-driven stochastic subspace identification algorithm. The frequency of first vertical bending modes is 2.10 Hz, falling into the human walking frequency range [1.6, 2.4] Hz. Therefore, the footbridge needs vibration control to improve its serviceability. Finally, a self-made TMD using lead, spring and oil buffer was implemented on the scaled model of the footbridge. The laboratory forced vibration test was employed to illustrate the effectiveness of the TMD. By installing TMD, the acceleration response at mid-span of the footbridge was remarkably reduced. The study could provide meaningful reference for vibration control design of the full-scale footbridge.


footbridge vibration serviceability modal analysis vibration control tuned mass damper 


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Copyright information

© Korean Society of Civil Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Civil Engineering and ArchitectureWuhan University of TechnologyWuhanChina
  2. 2.Dept. of Civil and Environmental EngineeringNational University of SingaporeSingaporeSingapore

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