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  4. Deriving a load model for the braking force on road bridges: Comparison between a deterministic and a probabilistic approach
 
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Deriving a load model for the braking force on road bridges: Comparison between a deterministic and a probabilistic approach

Martins, João
•
Fénart, M.-A.
•
Feltrin, Glauco
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2016
Developments in International Bridge Engineering - Selected Papers from Istanbul Bridge Conference 2014

The current provisions for the braking force in the Eurocodes are much more demanding than previously enforced national codes from most European countries. Hence, safety assessments of existing bridges may show a lack of compliance with the new safety requirements of current maintenance codes, making the relevant authorities responsible for their strengthening. The current load model for the braking force was derived from a deterministic evaluation of traffic configurations with characteristics that do not correspond with actual traffic measurements. This procedure differs from models describing vertical traffic loads, where the effects of traffic were analysed within a probabilistic framework in compliance with the partial safety factor design method. This paper investigates the advantages, limitations and hypotheses of a probabilistic model for the braking force when compared with deterministic models. Original results for the characteristic value of the braking force on road bridges are presented, which consider a realistic time-history of bridge crossing vehicles generated by a traffic microsimulation tool with input data from a Swiss Weigh-In-Motion station. The results are compared with the braking force of the Eurocodes, highlighting the role of the probability of braking and the influence of the dynamic characteristics of bridges on the characteristic value of the braking force.

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Type
book part or chapter
DOI
10.1007/978-3-319-19785-2_3
Web of Science ID

WOS:000381722500003

Author(s)
Martins, João
•
Fénart, M.-A.
•
Feltrin, Glauco
•
Dumont, André-Gilles  
•
Beyer, Katrin  
Date Issued

2016

Publisher

Springer International Publishing

Publisher place

Cham

Published in
Developments in International Bridge Engineering - Selected Papers from Istanbul Bridge Conference 2014
ISBN of the book

978-3-319-19784-5

978-3-319-19785-2

Total of pages

13

Start page

27

End page

39

Series title/Series vol.

Springer Tracts on Transportation and Traffic

Subjects

Traffic loads

•

Breaking forces

•

Probabilistic approach

•

Bridge engineering

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
EESD  
LAVOC  
Available on Infoscience
August 31, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/117495
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