Engineering Mechanics

International Conference

Proceedings Vol. 26 (2020)


ENGINEERING MECHANICS 2020

26th INTERNATIONAL CONFERENCE
November 24 – 25, 2020, Brno, Czech Republic
;
Editors: Vladimír Fuis

Copyright © 2020 Brno University of Technology Institute of Solid Mechanics, Mechatronics and Biomechanics

ISBN 978-80-214-5896-3 (printed)
ISSN 1805-8248 (printed)
ISSN 1805-8256 (electronic)

list of papers scientific commitee

DAMAGE IDENTIFICATION ON STRINGERS BY MODAL ANALYSIS
Marton M., Sokol M.
pages 346 - 349, full text

The paper is dedicated to damage identification on stringers of a steel truss bridge. Different damage types on the railway bridge, like cracks, rust, permanent deformation and so more are well known but rarely identified. One of the most common type of the damage is loss of material in stringer flanges caused by rust. In practice different methods for damage identification can be used. This paper focuses on higher mode shape and eigenfrequencies of stringer web vibration, which are more sensitive to damage locations. Parametric study has been performed where the effects of different damage locations along the stringer has been investigated. Later, changes in local eigenfrequencies and modal shapes of the stringer web have been analysed with respect to different location of damage. In global analysis identifying of corresponding higher frequencies is very difficult, because the values of the eigen modes are quite close to each other. Therefore, an original subroutine has been prepared that helps to find the corresponding modal shapes of the substructure used for damage identification. Using this method it is possible to identify a location of the damage by comparing changes in eigen modes.


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Ownership of copyright in original research articles remains with the Authors, and provided that, when reproducing parts of the contribution, the Authors acknowledge and/or reference the Proceedings, the Authors do not need to seek permission for re-use of their material.

All papers were reviewed by members of the scientific committee.


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