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Title: Dynamic response of suspension bridge to high wind and running train
Authors: Xu, YL 
Xia, H
Yan, QS
Keywords: Bridges, suspension
Dynamic responses
Railroad trains
Wind loads
Issue Date: 2003
Source: Journal of bridge engineering, 2003, v. 8, no. 1, p. 46-55 How to cite?
Journal: Journal of Bridge Engineering 
Abstract: A framework is presented for predicting the dynamic response of long suspension bridges to high winds and running trains. A three-dimensional finite-element model is used to represent a suspension bridge. Wind forces acting on the bridge, including both buffeting and self-excited forces, are generated in the time domain using a fast spectral representation method and measured aerodynamic coefficients and flutter derivatives. Each 4-axle vehicle in a train is modeled by a 27-degrees-of-freedom dynamic system. The dynamic interaction between the bridge and train is realized through the contact forces between the wheels and track. By applying a mode superposition technique to the bridge only and taking the measured track irregularities as known quantities, the number of degrees of freedom of the bridge-train system is significantly reduced and the coupled equations of motion are efficiently solved. The proposed formulation is then applied to a real wind-excited long suspension bridge carrying a railway inside the bridge deck of a closed cross section. The results show that the formulation presented in this paper can predict the dynamic response of the coupled bridge-train systems under fluctuating winds. The extent of interaction between the bridge and train depends on wind speed and train speed.
ISSN: 1084-0702
DOI: 10.1061/(ASCE)1084-0702(2003)8:1(46)
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