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  5. Determination of bridge lifetime dynamic amplification factor using finite element analysis of critical loading scenarios
 
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Determination of bridge lifetime dynamic amplification factor using finite element analysis of critical loading scenarios

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Author(s)
González, Arturo 
Rattigan, Paraic 
O'Brien, Eugene J. 
Caprani, Colin C. 
Uri
http://hdl.handle.net/10197/2135
Date Issued
September 2008
Date Available
07T13:29:55Z July 2010
Abstract
The development of accurate codes for the design of bridges and the evaluation of existing structures requires adequate assessment of heavy traffic loading and also the dynamic interaction that may occur as this traffic traverses the structure. Current approaches generally first calculate characteristic static load effect and then apply an amplification factor to allow for dynamics. This neglects the significantly-reduced probability of both high static loading and high dynamic amplification occurring simultaneously. This paper presents an assessment procedure whereby only critical loading events are considered to allow for an efficient and accurate determination of independent values for characteristic (lifetime-maximum) static and total (including dynamic interaction) load effects. Initially the critical static loading scenarios for a chosen bridge are determined from Monte Carlo simulation using weigh-in-motion data. The development of a database of 3-dimensional finite element bridge and truck models allows for the analysis of these various combinations of vehicular loading patterns. The identified critical loading scenarios are modelled and analysed individually to obtain the critical total load effect. It is then possible to obtain a correlation between critical static load effect and corresponding total load effect and to extrapolate to find a site-specific dynamic amplification factor.
Sponsorship
Irish Research Council for Science, Engineering and Technology
Type of Material
Journal Article
Publisher
Elsevier
Journal
Engineering Structures
Volume
30
Issue
9
Start Page
2330
End Page
2337
Series
Critical Infrastructure Group
Copyright (Published Version)
Copyright 2008 Elsevier Ltd
Keywords
  • Bridge loading

  • Traffic

  • Dynamics

  • Finite element modell...

  • Simulation

  • Statistics

Subject – LCSH
Bridges--Live loads--Mathematical models
Loads (Mechanics)--Mathematical models
DOI
10.1016/j.engstruct.2008.01.017
Web versions
http://dx.doi.org/10.1016/j.engstruct.2008.01.017
Language
English
Status of Item
Peer reviewed
ISSN
0141-0296
This item is made available under a Creative Commons License
https://creativecommons.org/licenses/by-nc-sa/1.0/
Owning collection
Civil Engineering Research Collection
Scopus© citations
42
Acquisition Date
Jan 27, 2023
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2160
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