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