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Identification of the modal characteristics of vibrations of mono span bridge beams on seismic damping supports

Identification of the modal characteristics of vibrations of mono span bridge beams on seismic... The aim of this work is relative to identification of modal characteristics of beam vibrations of mono span bridge beams on seismic damping supports. This has necessitated the development of a method of calculation of span bridge beams on damping supports and solicited by loads seismic origin. To do this, firstly, the solution of governing differential equation of the movement is presented in form of Fourier, thus reducing it to two ordinary differential equations. Using Krylov's functions, one able to obtain on the one hand, analytical expressions for determining vibration modes depending on the rigidities of beam damping supports. On the other hand, it is the analytical relationship between frequencies of beam vibrations and the reports of damping support rigidities and those of beams. Obtained results could be useful to engineers and researchers involved in the study of girder bridge structures under stresses of seismic origin. Keywords: seismic damping support; Krylov's functions; eigen frequencies and eigenmodes. Reference to this paper should be made as follows: Olodo, E.E.T. and Adjovi, E.C. (2015) ` of vibrations of mono span bridge beams on seismic damping supports', Int. J. Structural Engineering, Vol. 6, No. 3, pp.269­279. Biographical notes: Emmanuel E.T. Olodo is http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Structural Engineering Inderscience Publishers

Identification of the modal characteristics of vibrations of mono span bridge beams on seismic damping supports

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Publisher
Inderscience Publishers
Copyright
Copyright © 2015 Inderscience Enterprises Ltd.
ISSN
1758-7328
eISSN
1758-7336
DOI
10.1504/IJSTRUCTE.2015.070722
Publisher site
See Article on Publisher Site

Abstract

The aim of this work is relative to identification of modal characteristics of beam vibrations of mono span bridge beams on seismic damping supports. This has necessitated the development of a method of calculation of span bridge beams on damping supports and solicited by loads seismic origin. To do this, firstly, the solution of governing differential equation of the movement is presented in form of Fourier, thus reducing it to two ordinary differential equations. Using Krylov's functions, one able to obtain on the one hand, analytical expressions for determining vibration modes depending on the rigidities of beam damping supports. On the other hand, it is the analytical relationship between frequencies of beam vibrations and the reports of damping support rigidities and those of beams. Obtained results could be useful to engineers and researchers involved in the study of girder bridge structures under stresses of seismic origin. Keywords: seismic damping support; Krylov's functions; eigen frequencies and eigenmodes. Reference to this paper should be made as follows: Olodo, E.E.T. and Adjovi, E.C. (2015) ` of vibrations of mono span bridge beams on seismic damping supports', Int. J. Structural Engineering, Vol. 6, No. 3, pp.269­279. Biographical notes: Emmanuel E.T. Olodo is

Journal

International Journal of Structural EngineeringInderscience Publishers

Published: Jan 1, 2015

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