coll.'s Bridge aerodynamics : proceedings of a conference; London, PDF

By coll.

ISBN-10: 0727701355

ISBN-13: 9780727701350

ISBN-10: 0727745867

ISBN-13: 9780727745866

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Additional info for Bridge aerodynamics : proceedings of a conference; London, 25-26 March, 1981

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NMI Project No. 352005 June 1977. 4. Wind Excited Oscillations of a sectional model of a generalised plate girder bridge, Project No. 352017 NMI Report 1978. 5. R. Leonard and R. Eyre. TRRL Report LR862 1975. 6. Dynamic tests on the Cleddau Bridge at Milford Haven by R. Eyre. TRRL Supplementary Report 200 UC, 1976. Present Steering Group Members Dr. G. Tilley Sci. iv) Supplementary Report: NMI Project No. SI90/1169, December 1976. Davenport, 2nd Int. Conference. Wind Effects on Buildings and Structures Ottawa 1967.

Following the collapse of Cleddau Bridge at Milford Haven and the Yarra Bridge in Australia, the Merrison Committee was appointed in 1970 to consider the design criteria for box girder bridges. The committee were also asked to devise new design rules where necessary and to indicate areas requiring further research. The deliberations of the committee highlighted the deficiencies in the knowledge of aerodynamic behaviour of bridges and initiated a series of tests in their particular area of interest, which were carried out at the National Physical Laboratory (now the National Maritime Institute).

In these cases the dynamic response in the horizon­ tal direction is unlikely to cause an important dynamic magnification of the wind load effect. Caution is necessary for narrow long-span bridges, especially cable-stayed bridges. Caution may also be necessary for viaduct-type structures, even with moderate individual spans, if the piers are slender and the combined deckpier system is therefore relatively flexible in the horizontal direction. The aerofoil again offers a useful approach 30 to consideration of excitation in the vertical direction, especially for sections having large b/d.

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Bridge aerodynamics : proceedings of a conference; London, 25-26 March, 1981 by coll.


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