Linking London - The Millennium Bridge

[cve_jule]

Linking London - The Millennium Bridge

Linking London:
The Millennium Bridge
by:
Tony Fitzpatrick FREng
Pat Dallard
Sophie Le Bourva
Angus Low
Roger Ridsdill Smith
Michael Willford
This paper describes the structure of the London Millennium Footbridge.

The bridge opened on the 10th June 2000. During the opening day unexpected lateral movements occurred as pedestrians crossed the bridge. The paper describes the events of opening day and goes on to describe the research and analysis that was carried out as a result of these movements.

The lateral force exerted by pedestrians on the moving deck surface is found to be related to the velocity of the moving surface. The paper quantifies this relationship. The results show that the phenomenon is not related to the technical innovations of the bridge and that the same phenomenon could occur on any bridge with a lateral frequency below around 1.3Hz loaded with a sufficient number of pedestrians. A selection of other bridges, including one roadbridge found to have exhibited the same phenomenon, are listed.
No evidence of the same effect was detected vertically; a proposal for a vertical pedestrian crowd load model is made using random vibration theory.

Finally, the modification works being carried out on the bridge to reduce these movements
are described

Code:

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[epee]

Since this is papre describing the effects lateral excitation of pedestrian bridge, I thought it would be the appropriate thread to link a paper from ICE Bridge Engineering on this matter for the basis to design a mitigation against the phenomenon.

Code:

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Epee