Revisión de la validez del coeficiente de seguridad, propuesto por EHE-08, para la estimación de la vida útil de cálculo en estructuras de edificación sometidas a la acción de cloruros

Abstract

This paper presents a revision of the factor of safety of the service life suggested in the annex 9 of the Spanish Code on the Structural Concrete (EHE-08). The values in the results achieved in the particular case of corrosion by chlorides under certain conditions are clearly unsafe and not enough. The methodology used is similar to that of the security global method since only the service life of the project is considered. Any other variable (critical concentration, surface concentration, diffusion coefficient) is deterministic. The randomness can be implicit or not and the representatives values can vary which known as lack of invariance in the security measures. From the point of view of structural reliability, the level of security must be an invariant. This paper proposes a factor of safety based on a certain reliability index (ß) and a coefficient of variation (CV) for a supposed random variable.