Abstract: Corrosion is a long-term process resulting in the deterioration of
the reinforced concrete (RC) structures. Most of the structural problems
observed under the impact of either earthquakes or service loads might occur
due to corrosion. Therefore, prediction of the remaining service life of a
corroding RC structure plays an important role to prevent serious premature
damage. In this study, a corroded, 25-year-old high school building which has
been demolished at an earlier time was analyzed as a function of corrosion
rate. Bond-slip relationships were taken into account in nonlinear analyses as
a function of corrosion rate for different time periods (i.e., non-corroded (t:
0), existing (t: 25) and 50 years after construction); and they were used to
ensure the effect of time-dependent slip rotation on the global structural
behaviour by modifying the target post-yield stiffness of each structural
member. Nonlinear push-over analyses were performed by defining the
time-dependent plastic hinge properties as a consequence of corrosion effects.
In order to define the performance levels of three different time periods,
nonlinear incremental dynamic analyses (IDA) were performed for 20 earthquake
ground motion records as a function of corrosion rate. Results showed that
bond-slip relationship between concrete and steel is very important in
evaluating the non-linear behaviour of corroded RC structures.
