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Structural Engineering and Mechanics
  Volume 49, Number 2, January25 2014, pages 163-182
DOI: http://dx.doi.org/10.12989/sem.2014.49.2.163
 


Safety factor calibration for bridge concrete girders
Rita C. Silva and Christian Cremona

 
Abstract
    Safety factors proposed in codes CEB, B.A.E.L 91 and EUROCODE 1 cover a great number of uncertainties; making them inadequate for the assessment of existing structures. Suitable safety factors are established using a probabilistic assessment, once real dimensions, materials strength and existing structures deterioration mechanisms are taken into account. This paper presents a calibration method for safety factors using a typical set of RC bridges in France. It considers the principal stages of corrosion provoked by CO2 and Cl− penetration and threshold indexes (B0) for existing structures. Reliability indexes are determined by the FORM method in the calibration method.
 
Key Words
    calibration; corrosion; reinforced concrete; reliability; safety factors
 
Address
Rita C. Silva : Faculty UnB Gama, Complexo de Educacao, University of Brasilia, Cultura, Esporte e Lazer, 72405-610, Gama, Brazil
Christian Cremona : Directorate for Research and Innovation, Ministry of Ecology, Energy, Sustainable Development and Sea, Tour Pascal, 92055 La Defense, France
 

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