ABSTRACT
ABSTRACT: Taking account to the stochastic and time-dependent behaviors of existing concrete structures in service environment, an improved Path Probability Model (PPM) is established to predict the process of corrosion, crack and load capability degradation of existing reinforced concrete structures with time. The time-dependent probability distribution of reinforcement corrosion ratio, crack width and load capability loss of RC concrete in carbonation, chloride penetration or coupling-effect environment can be simulated effectively by numerical calculation. Therefore
it enable the computer simulation of the whole deterioration process of RC element from harmful mediums erosion, corrosion initiation of reinforcement, corrosion induced concrete crack and load capability reduction. Behavioral parameters involve percentage of corroded steel samples, steel corrosion ratio, area percentage of cracked concrete, and crack width and load capability reduction factor. These prediction results are proved reasonable and effective by statistics information from field data of existing concrete structures.
