Table of Contents
ISRN Civil Engineering
Volume 2012 (2012), Article ID 231674, 13 pages
Research Article

Fatigue Damage Estimation in Existing Railway Steel Bridges by Detailed Loading History Analysis

Department of Structural and Transportation Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy

Received 6 February 2012; Accepted 2 April 2012

Academic Editors: Z. Li and I. Raftoyiannis

Copyright © 2012 Alessio Pipinato et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Fatigue life estimation of metal historical bridges is a key issue for managing cost-effective decisions regarding rehabilitation or replacement of existing infrastructure. Because of increasing service loads and speeds, this type of assessment method is becoming relevant. Hence there is a need to estimate how long these structures could remain in service. In this paper a method to estimate fatigue damage in existing steel railway bridges by detailed loading history analysis is presented. The procedure is based on the assumption that failure probability is a function of the number of predicted future trains and the probability of failure is related to the probability of reaching the critical crack length.