Reliability index and parameter importance for bridge traffic loading definition changes

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Title: Reliability index and parameter importance for bridge traffic loading definition changes
Authors: Hanley, Ciarán
Frangopol, Dan M.
Kelliher, Denis
Pakrashi, Vikram
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Date: Mar-2018
Online since: 2019-05-14T12:03:01Z
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.
Funding Details: Irish Research Council
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
Keywords: BridgesHistoryRisk and probability analysis
DOI: 10.1680/jbren.15.00049
Language: en
Status of Item: Peer reviewed
Appears in Collections:Mechanical & Materials Engineering Research Collection

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