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TitleFramework for seismic vulnerability of highway bridge networks
AuthorAbo El Ezz, AORCID logo; Nollet, M -J; McGrath, HORCID logo; Nastev, MORCID logo
SourceCanadian Society for Civil Engineering Annual Conferrence 2018, full schedule/Congrès annuel de la Société canadienne de génie civil 2018, horaire complet; DM33, 2018 p. DM33.1-DM33.7 Open
Access logo Open Access
LinksOnline - En ligne (PDF, 266 KB)
Alt SeriesNatural Resources Canada, Contribution Series 20190584
PublisherCanadian Society of Civil Engineering
MeetingCanadian Society for Civil Engineering Annual Conferrence 2018 / Congrès annuel de la Société canadienne de génie civil 2018; Fredericton, NB; CA; June 13-16, 2018
DocumentWeb site
Mediaon-line; digital
File formatpdf
ProgramPublic Safety Geoscience Quantitative risk assessment project
Released2018 06 01
AbstractIn earthquake prone regions, the evaluation of seismic impacts on bridges is crucial to mitigation, emergency and recovery planning for highway networks. The degree of bridge damage determines the cost and time required for repairs and the level of post-earthquake functionality of the bridge determined by its capacity to carry traffic flow. The various losses of bridge functionality induce reduction or disruption of the transportation network, increase costs due to detour or reduced traffic flow and, what is most important, restrict access to emergency routes. This paper presents a framework for development and implementation of seismic vulnerability of highway networks. The proposed framework consists of the following successive models: hazard, exposure, damage and impact. The seismic hazard model generates spatial distribution of the shaking intensity for earthquake scenarios in terms of ground motion intensity measure (IM); the exposure model provides a database of bridge classes broadly defined with respect to their static and dynamic properties; the damage model assesses seismic performance of bridge classes in the network applying respective fragility functions represented as probabilistic relationships between the IMs and the simulated degree of expected damage; whereas the impact model evaluates the post-earthquake traffic-carrying capacity of the highway network based on the predicted damage including repair costs of bridges, road-closures and inspection priority. A case study of application of the proposed framework is presented for damage assessment of a hypothetical bridge network in Quebec City subjected to a magnitude M6 seismic scenario.

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