Title:
Seismic Performance of Corroded Precast Reinforced Concrete Columns with Intentional Debonding
Author(s):
Sayal Shrestha and Chris P. Pantelides
Publication:
Structural Journal
Volume:
121
Issue:
4
Appears on pages(s):
115-129
Keywords:
accelerated construction; corrosion; debonding; ductility; mass loss; precast; reinforced concrete (RC); seismic
DOI:
10.14359/51740713
Date:
7/1/2024
Abstract:
Accelerated bridge construction (ABC) has emerged as a faster
method of bridge construction. Reinforced concrete (RC) columns
in bridges constructed using ABC methods remain vulnerable to
corrosion, which impacts their performance during large earthquakes. Three specimens were constructed using ABC methods to investigate the effects of corrosion; two of these specimens were
subjected to accelerated corrosion procedures to simulate moderate
and severe corrosion levels. The longitudinal steel bars experienced
11% and 24% mass loss, while the steel spirals experienced 18%
and 40% mass loss for moderately and severely corroded specimens,
respectively. The severely corroded specimen experienced
buckling of longitudinal bars at 5.0% drift ratio. Corrosion severity
impacted column displacement capacity; the first reinforcing bar
fractured at lower drift ratios in the corroded specimens, both of
which experienced reduced displacement ductility and hysteretic
energy dissipation. The importance of considering corrosion in
evaluating seismic performance of RC bridges constructed using
ABC methods is demonstrated.