Excetional effects such as contact detonations, gunfire or high-velocity impact loads caused by the impact of an object cause local damage in reinforced concrete and steel fiber concrete components. The resulting tensile stresses on the load-opposite side very quickly exceed the dynamic concrete tensile strength and debris bursts or becomes a threat to people and property. Adding steel fibers can significantly reduce this very dangerous debris. The present work therefore deals with the behavior of steel fiber concrete components under highly dynamic effects from contact detonations. After the introduction to the material behavior of steel fiber concrete under static and highly dynamic loading, the quasi-static design and the highly dynamic types of loading are introduced. Then the experimental part follows with the production of the test specimens and the determination of the static and dynamic material characteristics. The investigation of the damaged area of the components on the protective side of the plate is carried out by means of non-destructive testing using the impact-echo method, which has proven to be less suitable. The plates are then cut in the middle and the damage in the material is measured manually. Furthermore, existing engineering models for the design of reinforced concrete and steel fiber concrete components are evaluated and their deficits are described. Subsequently, an engineering model is developed on the basis of the experimental tests to determine the fiber content to avoid flying debris on the side facing away from the load. Bases of computations of the kinetic spalling energy from the contact detonation the absorbable kinetic energy of the fiber concrete is determined as a function of the steel fiber content. The required amount of steel fibers in volume % for different parameter values is elaborated in the form of graphs. Which can also serve for engineering design practice. Finally, the experimental tests are validated with the engineering model and the design practice for further examples is illustrated.    «

Excetional effects such as contact detonations, gunfire or high-velocity impact loads caused by the impact of an object cause local damage in reinforced concrete and steel fiber concrete components. The resulting tensile stresses on the load-opposite side very quickly exceed the dynamic concrete tensile strength and debris bursts or becomes a threat to people and property. Adding steel fibers can significantly reduce this very dangerous debris. The present work therefore deals with the behavior...    »