Dynamic analysis of high-speed railway bridge decks using generalised beam theory

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Bebiano, R (Author) Other; Rui Calçada (Author) FEUP; Camotim, D (Author) Other; Silvestre, N (Author) Other

Journal

Title: Thin-Walled Structures

Vol. 114

Pages: 22-31

ISSN: 0263-8231

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 12 Citations

Other information

Authenticus ID: P-00M-DT9

DOI: 10.1016/j.tws.2017.01.027

Abstract (EN): This paper presents the details and illustrates the application of a semi-analytical Generalised Beam Theory (GBT) formulation for the dynamic analysis of high-speed railway bridge decks. The technique, which takes into account the cross-section local/distortional and shear deformations, provides an original "doubly modal" representation of the dynamic response, which makes it possible to acquire deep insight into the mechanics of the deck structural behaviour. It is employed to investigate the dynamic behaviour of a real high-speed railway viaduct, comprising a series of identical 46m-span simply supported box girder pre-stressed concrete decks carrying two tracks - the augmented structural response associated with resonance due to the crossing of trains at high-speeds is captured. The results obtained provide evidence that local/distortional deformation can play a significant role on the dynamic response of such structures. Moreover, the GBT analyses, whose validity is confirmed through the comparison with values yielded by shell finite element analyses, are shown to provide accurate results while involving just a few degrees of freedom.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10