Influence of ground motion type on nonlinear seismic behaviour and fragility of corrosion-damaged reinforced concrete bridge piers

Two identical reinforced concrete (RC) bridge piers including a rectangular and circular section are considered. The influence of corrosion damage, non-stationary characteristics ground motions, cross-sectional shape on nonlinear dynamic behaviour, failure mechanism probability these is investigated. An advanced modelling technique, capable coupled inelastic buckling low-cycle fatigue degradation reinforcement, employed to simulate the structural behaviour piers. considered with various mass loss ratios (as measure corrosion) subjected series static pushover analyses incremental under three different suites motions such as, Far-Field (FF), Near-Field With Pulse (NFWP), No (NFNP). Furthermore, an matching algorithm used investigate effect content near-field earthquake records presence large pulses in motion time corrosion-damaged RC Finally, fragility curves developed for each corroded pier suite. Analyses results show that significantly depends type. It concluded while both slight levels much more vulnerable NFWP than those FF NFNP motions; extremely approximately same regardless