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Proceedings Paper

Mathematical model for the determination of the vertical displacement from internal horizontal measurements of a bridge
Author(s): Samuel Vurpillot; Daniele Inaudi; Antonio Scano
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Paper Abstract

The evolution of the vertical displacements is considered to be a good criterion to assess the condition of a bridge. Most embedded deformation sensors (e.g. inductive sensors, optical fiber sensor...) give the relative displacement between two points in the same structure. Therefore, the vertical displacements of a bridge in an earth-bound coordinate system are not directly supplied by the deformation sensors. This paper presents an algorithm to determine the vertical displacement from internal deformation measurements in the bridge. It is shown that 6n deformation sensors are necessary to draw the exact vertical displacement of a bridge uniformly loaded on n plus 1 supports. A load test has been carried out on a 6 m long timber beam on 3 supports, instrumented with 12 fiber optic deformation sensors. The vertical displacements calculated by the mathematical model on the base of the horizontal measurements are found to be in good agrement with the ones obtained by external dial gages.

Paper Details

Date Published: 22 April 1996
PDF: 8 pages
Proc. SPIE 2719, Smart Structures and Materials 1996: Smart Systems for Bridges, Structures, and Highways, (22 April 1996); doi: 10.1117/12.238852
Show Author Affiliations
Samuel Vurpillot, Swiss Federal Institute of Technology (Switzerland)
Daniele Inaudi, Swiss Federal Institute of Technology (Switzerland)
Antonio Scano, Swiss Federal Institute of Technology (Switzerland)


Published in SPIE Proceedings Vol. 2719:
Smart Structures and Materials 1996: Smart Systems for Bridges, Structures, and Highways
Larryl K. Matthews, Editor(s)

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