In the present investigation, we consider a bridge modelled by a two-span orthotropic plate resting on a rigid support line perpendicular to the plate. The natural vibrations of this bridge are studied using a continuous approach [10]. The modal analysis carried out allows the dynamic equation of the plate to be decoupled. Solving the resulting equations leads to the optimal position of the support line which minimizes the natural frequencies of the bridge. This technique avoids discretization of the structure which could lead to errors that are difficult to control, and can be extended to a multi-span plate with different conditions at the edges of the plate.

bridge, orthotropic plate, multi-span, eigenfrequencies, eigenmodes.

Received: April 28, 2021; Accepted: July 2, 2021; Published: August 9, 2021

How to cite this article: Narcisse Ekoun Yao and Moussa Sylla, Vibration Study of a Two-Span Bridge, Far East Journal of Dynamical Systems 33(2) (2021), 81-113. DOI: 10.17654/DS033020081

This Open Access Article is Licensed under Creative Commons Attribution 4.0 International License

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