1st Croatian Conference on Earthquake Engineering 1CroCEE 2021

Bridges are one of the main and most vulnerable components on the transport infrastructure network, due to aggressive environment, degradation during the years of service, steel corrosion, etc. A considerable number of existing Albanian bridges have been designed and constructed before 1989 year, according to the former design code. Nowadays the design seismic code and their requirement are change. Therefore we need to assess the seismic performance of bridges under different seismic loadings in different levels of reliability regard in requirements of new standards to seismic actions. Developing a fragility curve for assessing bridge performance is an effective methodology in the evaluation of vulnerabilities of existing reinforced bridges. This study concerns providing a new method of seismic bridge assessment for bridge typology in Albania utilizing fragility curves, considering columns as the most vulnerable component. Ductility analysis for circular section piers is estimated by moment-curvature curves. The proposed method is also illustrated by two application assessment presented the step by step procedure.