ABSTRACT
The seismic design of bridges is vital for safety and functionality, especially for skewed bridges with asymmetrical geometry. This study assesses the impact of seismic design criteria on the seismic performance of Chilean skewed bridges. Fragility curves for bridges designed under the current design criteria are compared with those prior to 2010. Nonlinear analytical models, of typical Chilean bridges are subjected to ground motions records to obtain the damage probabilities of the bridges. The fragility assessment reveals that changes in design criteria alter component damage probabilities, with a more pronounced effect observed for skewed bridges compared to straight bridges. Additionally, current seismic design criteria reduce superstructure displacement and rotation but increase substructure stresses. Insights from this study contribute to the evaluation of seismic performance and offer recommendations for reinforcing vulnerable bridges.
