Fragility Assessment for Horizontally Curved Reinforced Concrete Box Girder Bridges Using As-built Data

Autor: Arya Zamiri, Mohammad-Reza Banan, Mahmoud-Reza Banan
Rok vydání: 2020
Předmět:
Zdroj: Iranian Journal of Science and Technology, Transactions of Civil Engineering. 45:1349-1369
ISSN: 2364-1843
2228-6160
DOI: 10.1007/s40996-020-00455-0
Popis: Damage to one or multiple components of a bridge could result in various conditions, extended from a cosmetically repairable damage to jeopardizing life safety of the users. Fragility curves are beneficial in seismic risk assessment. Due to the limitations of the transformation network, aesthetic considerations, etc., a bridge might be skewed or curved which makes the problem more complex. Fragility assessment of bridges utilizing dynamic analysis seems to be inevitable in reducing damage levels in future earthquakes. In this study, the effectiveness of adopting fragility curves in performance evaluation and risk assessment of bridges is investigated. It is done by considering a highway curved bridge with eleven piers. FEM model is developed using OpenSees platform. Time history dynamic analysis is used to obtain the displacements and forces as demands of each bridge component. Eventually, fragility curves are developed for four damage states. Pier fragility curves of this bridge depict a very appropriate behavior under various levels of excitation which could be related to the appropriate distance of the stirrups. Prevalent mode of the bridge causes torsion in the first bay of the bridge. In the other two bays, only longitudinal transfer of the deck was observed. Bearing fragility curves of the bridge depict fair results in the transverse direction due to the presence of the shear keys as opposed to the longitudinal direction.
Databáze: OpenAIRE
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