Damping and frequency of human-structure interaction system

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Abstract

Human presence can change the dynamic characteristics of human-structure interaction systems, i.e. particularly their damping and frequency. In many design codes, the pedestrian is regarded as a moving force (MF) while a more complete model, referred to as moving spring-mass-damper (MSMD) has received attention recently. Unlike the MF model, the MSMD model is able to take into account the human damping and stiffness effects. This paper is devoted to determining the instantaneous damping and frequency of the human-structure interaction (HSI) system subjected to a single and multiple pedestrians. Each pedestrian is modelled as a MSMD, and a methodology for determining the system damping and frequency properties is described. A simply supported beam structure is considered and modelled in modal space. The imparted pedestrian vertical force is modelled adopting the first four harmonics of Fourier representation using Young’s dynamic load factors. It is concluded that human presence can significantly increase and decrease damping and frequency of the structure, respectively and it is so important to consider human effect on the system’s damping and frequency in serviceability assessment of footbridges
Original languageEnglish
Title of host publicationMATEC Web of Conferences
Subtitle of host publicationEVACES 2015 - 6th International Conference on Experimental Vibration Analysis for Civil Engineering Structures
EditorsGlauco Feltrin
Place of PublicationLes Ulis France
PublisherEDP Sciences
Pages1 - 7
Number of pages7
Volume24
DOIs
Publication statusPublished - 19 Oct 2015
EventInternational Conference on Experimental Vibration Analysis for Civil Engineering Structures (EVACES 2015) - Dubendorf (Zurich), Switzerland
Duration: 19 Oct 201521 Oct 2015
Conference number: 6th
https://www.matec-conferences.org/articles/matecconf/abs/2015/05/contents/contents.html

Conference

ConferenceInternational Conference on Experimental Vibration Analysis for Civil Engineering Structures (EVACES 2015)
Abbreviated titleEVACES 2015
CountrySwitzerland
CityDubendorf (Zurich)
Period19/10/1521/10/15
Internet address

Cite this

Ahmadi, E., & Caprani, C. C. (2015). Damping and frequency of human-structure interaction system. In G. Feltrin (Ed.), MATEC Web of Conferences: EVACES 2015 - 6th International Conference on Experimental Vibration Analysis for Civil Engineering Structures (Vol. 24, pp. 1 - 7). [07006] Les Ulis France: EDP Sciences. https://doi.org/10.1051/matecconf/20152407006