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Time-dependent Seismic Fragility Assessment for Aging Highway Bridges Subject to Non-uniform Chloride-induced Corrosion.
- Source :
-
Journal of Earthquake Engineering . May2022, Vol. 26 Issue 7, p3523-3553. 31p. - Publication Year :
- 2022
-
Abstract
- This paper proposes an alternative time-dependent seismic fragility assessment framework considering the variable correlation of structural random parameters for aging highway bridges subject to non-uniform chloride-induced corrosion attacks. The proposed systematic framework is implemented to perform a probabilistic time-dependent seismic fragility assessment for a typical multi-span reinforced concrete continuous girder (MSRCCG) bridge. Effects of non-uniform chloride-induced deterioration on the time-evolving seismic capacity, seismic demand of reinforced concrete (RC) columns, and the time-dependent seismic fragility of the case-study bridge are investigated using nonlinear sectional moment-curvature and nonlinear time history analysis. Furthermore, this paper performs comparative studies to investigate the influence of variable correlation of structural random parameters on the time-variant seismic capacity, seismic demand of RC columns, and time-dependent seismic fragility of the case-study bridge. The results indicate the following conclusions: (1) Non-uniform chloride-induced corrosion may change the vulnerable position and the damage mechanisms of RC columns; (2) Due to non-uniform chloride-induced deterioration, the flexural capacity and curvature ductility of RC columns may exhibit a nonlinear reduction, while there is a nonlinear accelerated growth of time-dependent seismic fragility for aging highway bridges along their service lives; (3) The time-variant seismic capacity (i.e., the flexural capacity and curvature ductility) and seismic demand of RC columns tends to have a certain reduction and increase by ignoring the variable correlation of structural random parameters, respectively; and (4) The time-dependent seismic vulnerabilities of aging highway bridges may be overestimated by ignoring the variable correlation of structural random parameters. [ABSTRACT FROM AUTHOR]
- Subjects :
- *BRIDGE foundations & piers
*CONCRETE beams
*REINFORCED concrete
*ROADS
*CURVATURE
Subjects
Details
- Language :
- English
- ISSN :
- 13632469
- Volume :
- 26
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Journal of Earthquake Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 157518147
- Full Text :
- https://doi.org/10.1080/13632469.2020.1809561