Journal
STRUCTURAL SAFETY
Volume 76, Issue -, Pages 174-183Publisher
ELSEVIER
DOI: 10.1016/j.strusafe.2018.09.004
Keywords
Structural reliability; Subset simulation; Finite element method; Monitoring; Alarm threshold
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Funding
- Rock Engineering Research Foundation (BeFo) [381]
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Civil engineering structures are commonly monitored to assess their structural behaviour, using alarm thresholds to indicate when contingency actions are needed to improve safety. However, there is a need for guidelines on how to establish thresholds that ensure sufficient safety. This paper therefore proposes a general computational algorithm for establishment of reliability-based alarm thresholds for civil engineering structures. The algorithm is based on Subset simulation with independent-component Markov chain Monte Carlo simulation and applicable with both analytical structural models and finite element models. The reliability-based alarm thresholds can straightforwardly be used in the monitoring plans that are developed in the design phase of a construction project, in particular for sequentially loaded structures such as staged construction of embankments. With the reliability-based alarm thresholds, contingency actions will only be implemented when they are needed to satisfy the target probability of failure.
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