TIME-DEPENDENT RELIABILITY OF REINFORCED CONCRETE CONSIDERING CHLORIDE PENETRATION VIA BOUNDARY ELEMENT METHOD
STRENGTH DEGRADATION OF STRUCTURAL MATERIALS IS AN INEVITABLE PROCESS, DUE TO DELETERIOUS ACTIONS SUCH AS CORROSION AND FATIGUE. THESE PHENOMENA ARE ALSO TYPICALLY RANDOM, WITH DEGRADATION RATES AND STARTING TIME OF DEGRADATION PROCESS LARGELY UNCERTAIN. IN THE PARTICULAR CASE OF REINFORCED CONCRETE STRUCTURES, CORROSION OF REINFORCING BARS CAUSED BY CHLORIDE IONS IS ONE OF THE MAIN PATHOLOGICAL MANIFESTATIONS. PAST STUDIES ON THE TIME-VARIANT RELIABILITY OF REINFORCED CONCRETE STRUCTURES SUBJECT TO CORROSION HAVE RELIED ON SIMPLIFIED ANALYTICAL MODELS FOR ESTIMATING THE DEPASSIVATION TIME, I.E., THE TIME REQUIRED FOR CHLORIDE CONCENTRATION AT CONCRETE/STEEL INTERFACES TO BECOME CRITICAL. THIS STUDY CONTRIBUTES WITH AN ACCURATE MODELLING OF CHLORIDE DIFFUSION THROUGH CONCRETE USING THE BOUNDARY ELEMENT METHOD, WHICH IS EMPLOYED FOR THE FIRST TIME WITHIN A TIME-VARIANT RELIABILITY FRAMEWORK. CUMULATIVE FAILURE PROBABILITIES ARE EVALUATED IN TIME BY CONSIDERING RANDOM DEPASSIVATION TIMES, RANDOM CORROSION EVOLUTION, AND RANDOM LOAD PROCESSES. THE TIME-VARIANT RELIABILITY PROBLEM IS SOLVED USING MONTE CARLO SIMULATION. AN APPLICATION EXAMPLE IS PRESENTED, DEMONSTRATING THE CAPABILITIES OF THE PROPOSED FRAMEWORK.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License [CC BY] that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).