Bridges face many hazardous events. For those located along rivers, additional flood-related hazards, such as local scour, can occur. This study focuses on the vulnerability due to the ductility loss of bridges supported on shallow foundations, where both scouring and seismic risks are considered.The impact of scouring on bridge stability has received less consideration compared to seismic vulnerability. This study aims to overcome this lack by using a numerical modeling approach employing ductile fragility curves to assess the vulnerability of a typical reinforced concrete bridge model supported on shallow foundations. A complete bridge model is used, considering all the bridge's components and the soil-structure interaction. Moreover, the damage results are clustered by a fuzzy process to avoid analysis overestimation.The obtained results highlight the significance of considering both seismic and scouring in bridge vulnerability assessment, in addition to using a fuzzy clustering to optimize the obtained damage. For a bridge with shallow foundations, results indicate that scouring can positively influence the bridge's ability to dissipate energy, thereby improving its ductility. Although ductile fragility assessment could be used to assess the vulnerability of buildings during seismic events; however, it may not be relevant for other hazards, such as scouring.