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Imperfect inspection characterization for gamma process structural deterioration model

Ohadi, A. & Micic, T. (2014). Imperfect inspection characterization for gamma process structural deterioration model. In: Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures. (pp. 4033-4039). UK: CRC Press.


The deterioration of infrastructure facilities such as bridges has raised concerns over objective methodology to quantify the changes in their safety levels during the service life. In this paper the novel modeling of existing reinforced concrete structures likely future deterioration of strength is of interest. It is assumed that inspection outcomes are the source of data about the deterioration process and should provide help with the updating of the deterioration model with respect to the current structural condition. However, the inspection outcomes are associated with uncertainties that need to be taken into account for deterioration modeling. Sample reinforced concrete structure deterioration process is characterized as a time-dependent, non-negative and incremental process. In this paper we follow recent developments and the continuous gamma process has been adopted to represent the mathematical model of the deterioration process. In the current study two data sources were considered, the expert opinion, which is considered to reflect 'perfect inspection' and data obtained through scheduled inspections as 'imperfect inspection'. This paper reports on early development of the model to quantify the measurement error as inspection uncertainty and to establish continuous gamma process parameters for future deterioration prediction.

Publication Type: Book Section
Subjects: T Technology > TH Building construction
Departments: School of Science & Technology > Engineering
Text - Accepted Version
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