Updating and validation of the dynamic model of a railway viaduct with precast deck

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Joel Malveiro (Author) Other; Diogo Ribeiro (Author) Other; Rui Calcada (Author) FEUP; Raimundo Delgado (Author) Other

Journal

Title: Structure and Infrastructure Engineering

Vol. 10 No. 11

Pages: 1484-1509

ISSN: 1573-2479

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 28 Citations

ISI Web of Science

Scopus - 0 Citations

Scientific classification

FOS: Engineering and technology > Civil engineering

CORDIS: Technological sciences > Engineering > Civil engineering

Other information

Authenticus ID: P-009-W5W

DOI: 10.1080/15732479.2013.833950

Abstract (EN): This study describes the calibration and experimental validation of the dynamic model of a railway viaduct with precast deck. Global modal parameters of the structure and local modal parameters of the upper slab of the deck are identified based on a dynamic test. The calibration of the numerical model is done using a genetic algorithm that allows obtaining optimal values of 11 parameters of the numerical model. The inclusion of local modal parameters proved to be crucial, as various parameters of the numerical model do not have significant influence on global modal parameters. Mode pairing between numerical and experimental vibration modes is performed using a recent technique based on modal strain energy. The experimental validation of the calibrated numerical model is done by the comparison between numerical responses and experimental responses obtained in a dynamic test under railway traffic. This dynamic test shows the existence of a nonlinear behaviour of the viaduct's supports. There is an excellent correlation between numerical and experimental responses for different train speeds with the adjustment of the longitudinal supports stiffness of the calibrated model.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 26