ABSTRACT
ABSTRACT: Fiber-reinforced Ultra-High-Performance Concrete (UHPC) is a cementbased material which combines ultra-high compressive strength and an improved ductility with the well-known advantages of R/C-materials. With these characteristics, the material provides potentially decisive improvements not only for the static structural design of buildings but also for protective constructions against extraordinary dynamic loadings. Therefore, several experiments were conducted in order to assess the performance of the UHPC for a broad range of strain rates resulting from the different dynamic loadings. Based on the static material properties, dynamic material parameters of the fiber-reinforced UHPC were determined at first under very precise loading conditions using Hopkinson-bar experiments. Building on this elementary testing, the performance of different UHPC structural components are investigated, analyzed and discussed for the broad range of potential dynamic loading cases. Within this analysis, the UHPC was tested and evaluated against blast and aircraft impact loading scenarios representing the lower half of the potential strain rate spectra. Further additional loading cases like contact-and close-in detonations were also considered, which cover the high strain rates in combination with the examinations of a shaped charge loading. Finally, the suitability of the UHPC is regarded for combined effects taking into account an extraordinary dynamic loading in combination with a subsequent high temperature incident. Within this context, the capabilities for optimizing the material are discussed briefly.
