Numerical investigation of the influence of cross-sectional shape and corrosion damage on failure mechanisms of RC bridge piers under earthquake loading
Numerical investigation of the influence of cross-sectional shape and corrosion damage on failure mechanisms of RC bridge piers under earthquake loading
The study presented in this paper describes the coupled influence of corrosion and cross-sectional shape on failure mechanism of reinforced concrete (RC) bridge piers subject to static and dynamic earthquake loading. To this end, two RC columns varied in cross-sectional shape and corrosion degree are considered. An advanced nonlinear finite element model, which accounts for the impact of corrosion on inelastic buckling and low-cycle fatigue degradation of reinforcing bars is employed. The proposed numerical models are then subjected to a series of monotonic pushover and incremental dynamic analyses. Using the analyses results, the failure mechanisms of the columns are compared at both material and component levels. Furthermore, using an existing model in the literature for uncorroded columns, a dimensionless corrosion dependent local damage index is developed to assess the seismic performance of the examined corroded RC columns. The proposed new damage index is validated against the nonlinear analyses results. It is concluded that the combined influence of corrosion damage and cross-sectional shape result in multiple failure mechanisms in corroded RC columns.
Bridge pier, Buckling, Corrosion, Damage index, Incremental dynamic analysis, Reinforced concrete
4939-4961
Afsar Dizaj, Ebrahim
387bbd6f-a74a-47fe-9637-af62729ba50d
Kashani, Mohammad
d1074b3a-5853-4eb5-a4ef-7d741b1c025d
Afsar Dizaj, Ebrahim
387bbd6f-a74a-47fe-9637-af62729ba50d
Kashani, Mohammad
d1074b3a-5853-4eb5-a4ef-7d741b1c025d
Afsar Dizaj, Ebrahim and Kashani, Mohammad
(2020)
Numerical investigation of the influence of cross-sectional shape and corrosion damage on failure mechanisms of RC bridge piers under earthquake loading.
Bulletin of Earthquake Engineering, 18 (10), .
(doi:10.1007/s10518-020-00883-3).
Abstract
The study presented in this paper describes the coupled influence of corrosion and cross-sectional shape on failure mechanism of reinforced concrete (RC) bridge piers subject to static and dynamic earthquake loading. To this end, two RC columns varied in cross-sectional shape and corrosion degree are considered. An advanced nonlinear finite element model, which accounts for the impact of corrosion on inelastic buckling and low-cycle fatigue degradation of reinforcing bars is employed. The proposed numerical models are then subjected to a series of monotonic pushover and incremental dynamic analyses. Using the analyses results, the failure mechanisms of the columns are compared at both material and component levels. Furthermore, using an existing model in the literature for uncorroded columns, a dimensionless corrosion dependent local damage index is developed to assess the seismic performance of the examined corroded RC columns. The proposed new damage index is validated against the nonlinear analyses results. It is concluded that the combined influence of corrosion damage and cross-sectional shape result in multiple failure mechanisms in corroded RC columns.
Text
Dizaj & Kashani Accepted Manuscript
- Accepted Manuscript
More information
Accepted/In Press date: 27 May 2020
e-pub ahead of print date: 3 June 2020
Keywords:
Bridge pier, Buckling, Corrosion, Damage index, Incremental dynamic analysis, Reinforced concrete
Identifiers
Local EPrints ID: 441037
URI: http://eprints.soton.ac.uk/id/eprint/441037
ISSN: 1570-761X
PURE UUID: b886a1cd-820f-40a5-a73d-6af6aff8f1b1
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Date deposited: 28 May 2020 16:30
Last modified: 17 Mar 2024 03:46
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Author:
Ebrahim Afsar Dizaj
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