Dynamic loading and response of footbridges

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ConferenceC.S.C.E. Second International Conference on Short and Medium Span Bridges Proceedings: 17 August 1986, Ottawa, Ontario, Canada
Pages335347; # of pages: 13
Subjectdynamic loads; pedestrian overpasses; bridges; dynamic forces; walking; running; jumping; instrumented platform; sinusoidal force amplitudes; building code implications; bridges; resonant vibrations of spans; resonant dampers; Bridges
AbstractDynamic forces were measured during walking, running and jumping, using an instrumented platform. The results are expressed as sinusoidal force amplitudes normalized by the subject's weight and plotted versus frequency. The maximum dynamic loads for walking were found to be nearly twice as large as those recommended in the l983 Ontario Highway Bridge Design code or the British Standard BS5400, and those for running or jumping, more than six times as large. Responses of footbridges are calculated using a simple formula based on the dynamic loading due to one person, the response of a simple span at resonance, and limited duration of excitation. Good agreement was obtained with the measured response of two 17 m experimental spans subjected to human excitation, for both the first and second harmonics of the step rate, the resonant vibrations of the spans can be substantially reduced by resonant dampers.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number26485
NPARC number20374754
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Record identifier838b972f-a83a-4b91-a7ab-4fea7cb4969e
Record created2012-07-23
Record modified2016-05-09
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