Protecting Critical Civil Infrastructure Against Impact from Commercial Vehicles - Phase II, A Systems Based Approach

This proposal will expand on work completed for M05 by experimentally examining behavior of uncoated and FRP/polyureacoated material response time-history data being collected using instruments on the speciments and non-contact video tracking and laser scanning coupled with computer vision and by advancing computational studies, findings and design aids to include entire bridge system response under vehicle ipact and air blast.

This proposal will expand on work completed for M05 by experimentally examining behavior or uncoated and FRP/polyureacoated concrete under blast loads, with pressure, temperature and material response time-history data being collected using instruments on the specimens and non-contact video tracking and laser scanning coupled with computer vision and by advancing computational studeis, findings and design aids to include entire bridge system responses under vehicle impact and air blast. Developed models will include material behavioral information from aforementioned tests, foundations and surrounding soil systems using discrete element and particle based methods, different types of sub- and superstructure designs, and the effets of temperature on behavior, functionality and resiliency.

While findings and tools developed during Phase 1 were certainly of benefit to science and bridge design practice, further research is needed to ensure that a reasonable, not excessive, level of conservatism exists with recommended analysis methods and designs and/or retrofits when subjected to multiple hazards. Tasks proposed for Phase 2 will address these items and add considerable information to bridge engineering and infrastructure material bodies-of-knowledge, especially as they relate to: material behavior under high strain rates and excessive temperature; acquisition of data from demanding material tests; and rate based effects on bridge system sub- and superstructure response under high strain rates.

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