Download or read book Risk Assessment of Highway Bridges Under Multi-hazard Effect of Flood-induced Scour and Earthquake written by Taner Yilmaz and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural disasters may have significant impact on the functionality of highway transportation systems resulting in unacceptable socio-economic losses. Flood and earthquake hazards can be considered as two most significant natural threats to safety of bridges. The overarching need for safety and serviceability of critical transportation infrastructure system requires highway bridges to be analyzed and designed not only for discrete hazard events, but also for possible multiple-hazard (or multi-hazard) conditions. For a highway network spanning over a seismically-active flood-prone region, the occurrence of earthquakes in the presence of flood-induced scour is a possible multi-hazard scenario for bridges in the network. The varied dynamic characteristics of a bridge due to the occurrence of scour may affect the response of the bridge under earthquake loading, and eventually may increase the risk of bridge failure.Despite the rising concern of research communities on this topic, the issues related to the multi-hazard effect of flood-induced scour and earthquake on highway bridges have not been satisfactorily answered. In addition, no guideline is currently available in design codes to ensure seismic safety of bridges with potentially scoured foundations. This dissertation aims to improve a comprehensive knowledge-base on risk and reliability analyses of highway bridges subjected to this multi-hazard by developing a multi-hazard risk assessment framework for bridges and quantifying variability in multi-hazard fragility and risk of bridges through a thorough uncertainty analysis. Outcome of this research provides research communities and government agencies a better understanding of the multi-hazard effect of flood-induced scour and earthquake on the risk and reliability of highway bridges. It also serves as a foundation for future researches on developing strategic plans for repair or retrofit prioritization for highway bridges under similar multi-hazard conditions.