Post-Hazard Engineering Assessment of Highway Structures using Remote Sensing Technologies
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2019-12-01
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Edition:Final Report
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Abstract:There are approximately 615,000 bridges in the United States. Many of these bridges serve as critical parts of the transportation network locally, regionally and nationwide, and are essential for transportation of goods and people before, during and after extreme natural hazards. This report presents a detailed study on engineering post-hazard assessment of bridges with focus on geo- and hydraulic hazards. The objective of post-hazard assessment is to collect engineering data related to the behavior and damage to bridges. The report presents a detailed investigation on post-hazard engineering assessment through: (i) literature review of the current state of the art on post-hazard assessment for geo- and hydraulic hazards including data needs and gaps; (ii) field evaluation using unmanned aerial systems (UAS) for 3D photogrammetry of two bridge structures in Maryland as well as field evaluation using unmanned water systems (UWS) for developing bathymetric profiles; and, (iii) investigation on resolution of bridge movement detection using UAS through testing of a scaled bridge model. It has been demonstrated that UAS and UWS are invaluable and powerful technology for collecting engineering data after an extreme natural hazard event. However, numerous knowledge gaps exist in full implementation of an engineering data collection program.
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