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Reliability index and parameter importance for bridge traffic loading definition changes
Alternative Title
Variations in Reliability with Bridge Live Load Definitions
Date Issued
March 2018
Date Available
14T12:03:01Z May 2019
Abstract
With the continued evolution of traffic loading specifications, safety classifications of bridge structures are subject to change, independent of the actual condition of the structures at that point in time. As investment decisions are often based on these safety classifications, a reclassification of safety level due to changing of traffic load definitions can lead to misinterpretation of the actual state of the structure, and thus lead to a misallocation of resources. Should a reclassification of safety occur after a change in traffic load specification, the question as to whether modern design codes are producing more or less robust bridges than previous design codes is raised. To investigate this, three bridge structures were assessed for evolving definitions of traffic load. Using deterministic and probabilistic methods, critical limit-states were assessed and the associated reliability indices and parametric sensitivity factors were determined and compared across various code specifications. This comparison allowed for the evaluation as to how the evolution of traffic load over time influences the computed safety of bridge structures.
Sponsorship
Irish Research Council
Other Sponsorship
John Sisk Postgraduate Research Scholarship in Civil Engineering
Type of Material
Journal Article
Publisher
ICE Publishing
Journal
Proceedings of the Institution of Civil Engineers - Bridge Engineering
Volume
171
Issue
1
Start Page
13
End Page
24
Copyright (Published Version)
2018 ICE Publishing
Language
English
Status of Item
Peer reviewed
ISSN
1478-4637
This item is made available under a Creative Commons License
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