Exposure knowledge impact on regional seismic risk assessment of bridge portfolios

The lack of structural information on existing bridges is a common problem faced by engineers when performing regional seismic risk assessment large bridge portfolios. In most regions, the inventory composed structures built over decades and detailed configurations difficult to obtain can be expensive survey. Most studies for are done with incomplete exposure knowledge usually rely macro taxonomy-based approaches that average fragility assets similar configurations. This leads an unknown level uncertainty in results commonly not quantified or accurately communicated stakeholders. Accordingly, there need better understanding how much expected using such approaches, as well recommendations those dealing this type project define appropriate required minimum reasonable results. study, portfolio 617 complete was performed its were used benchmark quantify considering different levels approach machine learning model. obtained suggest having at least one third considerable reduction models outperform traditional methodologies sufficient available.