Dynamic Analysis Of Railway Bridges Supported
By A Winkler Foundation Under Uniform
Partially Distributed Moving Railway Vehicles
Author(s)
J. A. Gbadeyan & M. C. Agarana
Abstract
Transport structure such as railway bridges (plates), are subjected to moving
railway vehicles (loads) which vary in both space and time. This branch of
transport has experienced great advances, characterised by increasing high speed
and weights of railway vehicles. Structures and media on which the railway
vehicles move have, therefore, been subjected to vibration and dynamic stress
more than ever before. The motivation for this paper is the observation that most
of the works available in the literature are concerned with plates for which the
effects of both rotatory inertia and shear deformation are neglected. Also the
plates are assumed not resting on any foundation. In this paper, the dynamic
response of railway track, modelled as an elastic rectangular plate, continuously
supported by an elastic foundation and traversed by moving railway vehicle is
investigated. Finite difference method is used to transform the set of coupled
partial differential equations to a set of algebraic equations. The desired solutions
are obtained with the aid of computer programs developed in conjunction with
MATLAB. This shows that the elastic foundation, rotatory inertia and shear
deformation have significant effect on the dynamic response of the railway
bridge, to the moving railway vehicle (modelled as partially distributed moving
load). In particular, it is observed that the deflection of the railway bridge
decreases as the foundation moduli increase.
Keywords: Winkler foundation, Mindlin plate, finite difference method, dynamic
response, railway vehicle, railway tracks.
Keywords
Winkler foundation, Mindlin plate, finite difference method, dynamic
response, railway vehicle, railway tracks.
Related Book
Other papers in this volume
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