Reliability updating based on monitoring of structural response parameters

• Two examples of structural response monitoring are described.
• Application of measurements is discussed in relation to updating of load and structural parameters.
• Quantification of the value of response monitoring is made for both of the examples.

Short- and long-term aspects of measuring structural response parameters are addressed. Two specific examples of such measurements are considered for the purpose of illustration and in order to focus the discussion. These examples are taken from the petroleum industry (monitoring of riser response) and from the shipping industry (monitoring of ice-induced strains in a ship hull). Similarities and differences between the two cases are elaborated with respect to which are the most relevant mechanical limit states. Furthermore, main concerns related to reliability levels within a short-term versus long-term time horizon are highlighted. Quantifying the economic benefits of applying monitoring systems is also addressed.