Abstract:
Steel reinforcement corrosion is one of the major deterioration mechanisms of
Reinforced Concrete (RC) structures. Once the corrosion signs appear on the
concrete surface, it'll intensify further corrosion and as a result, service life of RC
structures will be reduced. Many structural failures in RC structures were occurred
due to seismic forces and corrosion triggers the vulnerability of these structural
failures. Due to corrosion, concrete members may loose their dynamic carrying
capacity and tend to fail a member when an earthquake occurred. Due to the failure
of a member, whole structure may fail. Therefore, the prediction of the dynamic
behavior of RC structures with different corrosion conditions is vital. If the dynamic
behavior of corroded RC members can be predicted, then the members which are in
critical condition can be identified. This study was aimed to develop a reliable
methodology to predict dynamic behavior of corroded concrete members. In this
study, large scale RC beam specimens were constructed and 'electrochemical
corrosion technique' was used to corrode the reinforcement bars of the specimens.
All the specimens were tested under same cyclic loading condition and tire behavior
of the specimens were analyzed with respect to their corrosion level. It was revealed
that the dynamic strength capacity was reduced with the increase of the severity of
the corrosion conditions.
