Numerical modelling of riveted railway bridge connections for fatigue evaluation
Imam, BM, Righiniotis, TD and Chryssanthopoulos, MK (2007) Numerical modelling of riveted railway bridge connections for fatigue evaluation Engineering Structures, 29 (11). 3071 - 3081. ISSN 0141-0296
Imam et al - FINAL.pdf
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Past experience has shown that stringer-to-cross-girder connections in riveted railway bridges are susceptible to fatigue cracking. This fatigue damage is caused by secondary stresses, which develop in the different components of the connection. For this reason, more detailed analysis techniques are needed to capture this type of behaviour. In this paper, a finite element (FE) model of a typical riveted railway bridge is developed by incorporating the detailed local geometry of a stringer-to-cross-girder connection into the global bridge model. Before the development of this model, benchmark FE studies are carried out on a double-lap joint and the results are presented in terms of stress concentration factors and stress gradients. Further verification studies are carried out on a local bridge connection FE model, in terms of its rotational stiffness. After this investigation, a refined FE model of the bridge is analysed under the passage of a freight train. Principal stress histories at different components of the connection are obtained, which are then combined with the plain material S–N curve, in order to identify the most fatigue-critical locations of the connection. These are identified as being the rivet holes and, in some cases, the angle fillet. By considering different rivet clamping stresses and different rivet defect scenarios it is found that the most damaging effects are caused by the presence of clearance between the rivet shank and the hole, and the loss of a rivet. The rivet clamping stress is also found to affect fatigue damage considerably.
|Additional Information:||Copyright 2007. Elsevier. All rights reserved. NOTICE: this is the author’s version of a work that was accepted for publication in Engineering Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Engineering Structures, 29(11), 2007, DOI: 10.1016/j.engstruct.2007.02.011|
|Divisions:||Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering|
|Depositing User:||Symplectic Elements|
|Date Deposited:||08 Mar 2012 17:08|
|Last Modified:||23 Sep 2013 18:56|
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