Reliability-based alarm thresholds for structures analysed with the finite element method

•Reliability-based alarm limits for civil engineering structures.•Algorithm that combines Subset simulation MCMC with the finite element method.•Discussion on the applicability of the algorithm to different types of structures. Civil engineering structures are commonly monitored to assess their stru...

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Bibliographic Details
Published in:Structural safety 2019-01, Vol.76, p.174-183
Main Authors: Spross, Johan, Gasch, Tobias
Format: Article
Language:English
Subjects:
Alarm behavior
Alarm systems
Alarm threshold
Algorithms
Byggvetenskap
Civil and Architectural Engineering
Civil engineering
Computer applications
Computer simulation
Construction
Contingency
Embankments
Finite element analysis
Finite element method
Markov chains
Mathematical analysis
Mathematical models
Monitoring
Monitoring systems
Monte Carlo simulation
Reliability analysis
Reliability engineering
Safety
Security systems
Simulation
Structural engineering
Structural models
Structural reliability
Subset simulation
Thresholds
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Summary:•Reliability-based alarm limits for civil engineering structures.•Algorithm that combines Subset simulation MCMC with the finite element method.•Discussion on the applicability of the algorithm to different types of structures. 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.
ISSN:0167-4730
1879-3355
1879-3355
DOI:10.1016/j.strusafe.2018.09.004