Examination of Alternative Strategies for Integration of Seismic Risk Considerations in Bridge Management Systems

摘要

The development of models for consideration of natural hazard and extreme events in bridge management systems has been recognized as a need for future research and development. Two alternative approaches have been proposed for the integration of such models. The first approach is based on existing prioritization procedures and employs a value-mapping approach to convert priority indices to economic measures. Alternatively, a rigorous risk-based procedure could be developed. The applicability of using a value-based approach for seismic vulnerability mitigation is first examined. Priorization procedures developed by the FHWA, State DOT's, and through independent research, efforts are utilized and prioritization performed on a sample data set. It is seen that required information for prioritization performed on a sample data set. Itis seen that required information for prioritization is not available in current bridge inventory and inspection databases and additional information requirements are documented. For examination, this required information was culled through available plans or assumed base don the configuration. It is shown that use of the prioritization procedures developed similar network-level cost estimates; however, there is wide variance based on component-level fragility relationships. The approach is demonstrated for the sample bridges and compared to results obtained through prioritization procedures. Methods for integration compared to results obtained through prioritization procedures. Methods for integration of the procedures are examined and demonstrated for Pontis and BRIDGIT