Bending strength diagnosis for corroded reinforced concrete beams with attendance of deterministic, random and fuzzy parameters

ABSTRACT The concrete reinforced beams, especially in coastal zones, usually show the signs of degradation due to the steel reinforcement corrosion after a period of serving. It causes the strength of the concrete reinforced structures decreasing. Remaining strength of corroded reinforced structures is needed to assess in a specific time. However, it is not easy to have all input data for assessing the service life of reinforced concrete structures because many parameters have been also changed along with the corrosion of steel reinforcements. An algorithm is developed for forecasting the strength remains of the beams in which the reinforcement corrosion is considered. The reinforcement corrosion is assumed as effecting on the diameter of steel bars and the bond between steel bar and concrete. In case of incomplete data, statistical analysis of the corrosion percentage was conducted using Monte Carlo simulations. The results of the algorithm are verified with the published results.