Countermeasure material requirements (objective 1) is common to all materials. The first objective is identical to that of the ultra-high performance concrete/high-performance steel study. Assessment of material use (objective 2) is a sorting of materials to determine the best role (direct resistance/load damping/alternate load paths) for each. This includes countermeasures that may be a composite of two or more material types. For both studies, results for these two objectives will be presented in common. Detailed assessment and research plans (objective 3) for fiber-reinforced composite, ultra-high performance concrete, and high-performance steel will be presented as separate chapters.
The key project objectives are:
- List of countermeasure material requirements to protect those bridge components identified as vulnerable to attack, seismic, and vehicle impact loads.
- Assessment of potential for material use in three countermeasure functions: direct resistance, load damping, and alternate load paths. For counterterror needs, the protection requirements will be significantly higher than that provided by currently available retrofit materials. For seismic and impact, the performance requirements must meet current specifications.
- Development plans for candidate ultrahigh performance concrete and high-performance steel (materials/patterns) countermeasures to meet, where feasible, the material requirements identified in objective 1.