Abstract
This study presents the results of a refined numerical investigation meant at understanding the time-dependent cyclic behavior of reinforced concrete (RC) bridge columns under chlorides-induced corrosion. The chloride ingress in the cross-section of the bridge column is simulated, taking into account the effects of temperature, humidity, aging, and corrosion-induced cover cracking. Once the partial differential equations governing such multiphysics problem are solved through the finite-element method, the loss of reinforcement steel bars cross-section is calculated based on the estimated corrosion current density. The nonlinear cyclic response of the RC bridge column under corrosion is, thus, determined by discretizing its cross-sections into several unidirectional fibers. In particular, the nonlinear modeling of the corroded longitudinal rebars exploits a novel proposal for the estimation of the ultimate strain in tension and also accounts for buckling under compression. A parametric numerical study is finally conducted for a real case study to unfold the role of corrosion pattern and buckling mode of the longitudinal rebars on the time variation of capacity and ductility of RC bridge columns.
| Original language | English |
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| Number of pages | 23 |
| Journal | Structural Concrete |
| Early online date | 16 Sep 2021 |
| DOIs | |
| Publication status | E-pub ahead of print - 16 Sep 2021 |
Bibliographical note
Funding Information:Federbeton, Grant/Award Number: "Seismic Behaviour of Integral Bridges"; Laboratories University Network of Seismic Engineering (ReLUIS), Grant/Award Numbers: DPC/ReLUIS 2019‐2021 ‐ UR RM1 WP 4‐11, DPC/ReLUIS 2019‐2021 ‐ UR RM3 WP 11.2‐11.3; National Natural Science Foundation of China, Grant/Award Number: 51778148; Sapienza Università di Roma, Grant/Award Number: RM120172B37F0628 Funding information
Funding Information:
It is acknowledged the support from the Laboratories University Network of Seismic Engineering (ReLUIS) through the research project DPC/ReLUIS 2019‐2021—UR RM3 WP 11.2‐11.3 (by Davide Lavorato, Camillo Nuti, and Angelo Pelle) and UR RM1 WP 4‐11 (by Giuseppe Quaranta). The support from Federbeton (Italy) through the research project “Seismic Behavior of Integral Bridges” is acknowledged by Davide Lavorato, Camillo Nuti, and Angelo Pelle. Bruno Briseghella acknowledges the financial support from the National Natural Science Foundation of China (Grant No. 51778148). The work by Giuseppe Quaranta is framed within the research project “Smart technologies and decision support tools for the assessment of deteriorating reinforced concrete infrastructures in seismic areas at territorial scale” (Grant No. RM120172B37F0628) funded by Sapienza Università di Roma. The authors are grateful to Eng. Marco Manai at the Provincia di Oristano for kindly supplying the design data of the examined bridge.
Publisher Copyright:
© 2021 The Authors. Structural Concrete published by John Wiley & Sons Ltd on behalf of International Federation for Structural Concrete