WIND C/o the Institution of Civil Engineers
One Great George Street
ENGINEERING London SW1P 3AA
Telephone: +44 (0) 20 7665 2229
SOCIETY Fax: +44 (0) 20 7799 1325
Evening Technical Meeting
INSTITUTION OF CIVIL ENGINEERS
ONE GREAT GEORGE STREET, LONDON, SW1P 3AA
Wednesday 16th March 2011 at 6.00pm
(Refreshments available from 5.30pm in the Brasserie)
DR ALLAN LARSON
CEO Flint & Neill
DR JOHN OWEN
Please note there is no charge and non-members of the Society are welcome to attend.
For further information or to express an interest in attending, please contact Tim Fuller at the ICE on:
Tel: 020 7665 2234 Fax: 020 7799 1325 Email: email@example.com
It is our intention to transmit a webcast of the technical meeting.
Further details of this will be circulated to WES members prior to the event.
Resent Experiences With Vortex Induced Vibration of Long Span
Occasionally long span cable supported and beam bridges are found to oscillate
rhythmically during windy conditions. Recently such an example involving vertical
oscillations the newly built Volgograd Bridge in Russia saw substantial attention in the
media including several entries on the Internet based Youtube. Some of these entries
debated if the Volgograd incident could develop into another wind related bridge
catastrophe similar to the 1940 collapse of the Tacoma Narrows Bridge. The
presentation will revisit discrete vortex simulations performed to understand the
Volgograd incident and explain why the wind induced oscillations of this bridge could
not develop to a catastrophic collapse similar to the Tacoma Narrows Bridge. Also the
talk will present design guide lines developed by the speaker for shallow bridge box
girders to prevent vortex induced oscillations.
Allan Larsen received his MSc from the Technical University of Denmark in 1979, a
Diploma Course in wind engineering from the von Karman Institute in 1980 and a PhD
in flow induced vibrations from the Danish Academy of Sciences in 1983. Since 1989
Allan Larsen has been responsible for the wind engineering and design of long span
bridges such as the Great Belt Bridge, Denmark, Höga Kusten Bridge, Sweden, the
Gibraltar Bridge Project, Spain, the Stonecutters Bridge, Hong Kong and the Messina
CEO Flint & Neill
As footbridge designs get lighter and more esoteric structures emerge, the knowledge
of aerodynamic performance becomes more important. Presently, the codified
requirements, originally set down in BD 49/01 and now embedded in the Eurocodes
within EN1991-1-4 and the National Annex PD6688-1-4, are difficult to apply to
bridges and guidance is required to assist designers in determining the risk of
aerodynamic response in footbridges. The presentation will look at some of the issues
that arise and the results of tests on footbridges and their agreement with the codes.
David Mackenzie is a past Chairman of the Society and is currently on the committee.
He is extensively involved in the codification and assessment of wind sensitive
structures, primarily in long span structures. With Tom Wyatt and Brian Smith, he was
involved in developing the changes to BD49 in 2001. He is the CEO of Flint & Neill
Limited and still searching for the reason why a cricket ball reverse swings.