Probability-based life Prediction
The estimation of the life expectancy of a structure is not a simple task. Many factors affect the life of a structure. These factors include design parameters, design safety factors, design methods, type of structure, structural details, materials, construction methods and quality, loads, maintenance practices, inspection methods, and other environmental factors. These factors have different types of uncertainty associated with them. Generally, these factors have the following types of uncertainty: (1) physical randomness in magnitude and time of occurrence, (2) statistical uncertainties due to using limited amount of information in estimating the characteristics of the population, (3) model uncertainties due to approximations in the prediction models, and (4) vagueness in the definition of various factors and their effect on life. Therefore, the estimation of life expectancy is a complex process.
KeywordsFailure Mode Failure Probability Load Effect Parent Distribution Inspection Period
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