Updating structural reliability efficiently using load measurement. (May 2020)

• Record Type: Journal Article
• Authors: De Koker, N.; Viljoen, C.; Lenner, R.; Jacobsz, S.W.
• Is Part Of: Structural safety. Volume 84(2020)
• Publication Date: 2020-05
• Subjects: Updating reliability -- First-order reliability method -- Reliability of existing structures -- Structural health monitoring; Structural stability -- Periodicals; Safety factor in engineering -- Periodicals; Reliability (Engineering) -- Periodicals; Constructions -- Stabilité -- Périodiques; Coefficient de sécurité en ingénierie -- Périodiques; Fiabilité -- Périodiques; 620.86
• DOI: 10.1016/j.strusafe.2020.101939
• Languages: English
• ISSNs: 0167-4730

Abstract

Highlights: A method for updating structural reliability using measured loading is developed. Its first order implementation is shown to be computationally efficient and accurate. The method can be applied to a diverse spectrum of multi-parameter structural problems. Abstract: The observation of an existing structure supporting a particular maximal load provides a direct constraint on the possible range of values its resistance capacity may take. The implied update of structural reliability allows monitoring and maintenance planning to be done from a risk optimal perspective. Existing proof load-based reliability updating techniques require multiple numerical computations which are often too cumbersome for routine use. By building on the assumptions of the first order reliability method, this study develops and validates a first order reliability updating approach which is computationally efficient. The resulting formulation is shown to be applicable to reliability problems tractably considered using the first order reliability method. This method is illustrated for two example structures: a reinforced concrete beam forming part of a highway bridge to which traffic loading data is applied, and a granular embankment forming a seawall on a shoreline mining operation for which the phreatic surface level is monitored.