Abstract
Structural Integrity Risk Analysis (SIRA) is a crucial tool for any maritime structures and asset owners to ensure the current condition of their assets, are in safe condition and there are no risks to personnel, business, and environment. Nevertheless, there is no single standard method to conduct this kind of structural risk analysis and so, asset owners and authorities are utilising different methods based on their best practice to come up with suitable structural risk figures for their assets. Despite best efforts, there is a chance to miscalculate the actual risk and, in most cases, underestimate the current structural risk. This has become particularly more important for the assets that are complex and aged. This paper tries to fill this gap by introducing some key indicators which can enhance the accuracy of SIRA and provide a better understanding for key decision makers to keep their assets in fair conditions and prevent any unwanted business interruption. To address this issue and minimise the risk of underestimating the actual structural risk, reliable indicators such as Condition Rating (CR), Section Utilisation (SU), Defect Heatmap (DH) and, Structural Criticality (SC) are introduced. These indicators can be fed later into any risk matrix / system to estimate the inherent and future risk of structural sections in offshore terminals. To evaluate this method in practice, more than 5 years of structural condition data of one of the offshore terminals in Australia has been considered. Next, the key structural indicators and their variation over a 24-month time window were developed, analysed, and monitored. Furthermore, the outcome has been used to update the structural asset management and maintenance strategy. Finally, to monitor the structural risk over time, two additional indicators; Defect Completion Rate (DCR) and Defect Overdue Index (DOI) have been introduced.
