TY - JOUR
T1 - Seismic assessment of corroded concrete bridges using incremental modal pushover analysis
AU - Bergami, Alessandro Vittorio
AU - Pelle, Angelo
AU - Fiorentino, Gabriele
AU - Lavorato, Davide
AU - Giaccu, Gian Felice
AU - Quaranta, Giuseppe
AU - Briseghella, Bruno
AU - Nuti, Camillo
N1 - Publisher Copyright:
© 2021 ICE Publishing: All rights reserved.
PY - 2022/12/1
Y1 - 2022/12/1
N2 - An efficient yet accurate procedure was developed for the seismic assessment of reinforced concrete (RC) bridges subject to chloride-induced corrosion. The procedure involves using incremental modal pushover analysis to assess corroded bridges as an alternative and less computationally demanding approach to non-linear dynamic analysis. A multi-physics finite-element analysis is performed to evaluate the effects of chloride-induced corrosion on bridge columns. In doing so, chloride ingress in concrete is numerically simulated as a diffusion process by considering the effects of temperature, humidity, corrosion-induced cover cracking and concrete aging. The estimated chloride concentration is then employed to evaluate the corrosion current density, from which the effects of corrosion on reinforcement, cracked cover concrete, confinement and plastic hinge length can be determined for subsequent non-linear static analysis. A case study of a typical bridge structure is presented. The proposed procedure can be used to assess the seismic performance of irregular RC bridges exposed to severe corrosive environments.
AB - An efficient yet accurate procedure was developed for the seismic assessment of reinforced concrete (RC) bridges subject to chloride-induced corrosion. The procedure involves using incremental modal pushover analysis to assess corroded bridges as an alternative and less computationally demanding approach to non-linear dynamic analysis. A multi-physics finite-element analysis is performed to evaluate the effects of chloride-induced corrosion on bridge columns. In doing so, chloride ingress in concrete is numerically simulated as a diffusion process by considering the effects of temperature, humidity, corrosion-induced cover cracking and concrete aging. The estimated chloride concentration is then employed to evaluate the corrosion current density, from which the effects of corrosion on reinforcement, cracked cover concrete, confinement and plastic hinge length can be determined for subsequent non-linear static analysis. A case study of a typical bridge structure is presented. The proposed procedure can be used to assess the seismic performance of irregular RC bridges exposed to severe corrosive environments.
KW - bridges
KW - concrete structures
KW - corrosion
UR - https://www.scopus.com/pages/publications/85119346073
U2 - 10.1680/jbren.21.00025
DO - 10.1680/jbren.21.00025
M3 - Article (Academic Journal)
AN - SCOPUS:85119346073
SN - 1478-4637
VL - 175
SP - 213
EP - 227
JO - Proceedings of the Institution of Civil Engineers: Bridge Engineering
JF - Proceedings of the Institution of Civil Engineers: Bridge Engineering
IS - 4
ER -