Improvement of local Resistance of Safety-Related Structures and Reduction of Dynamic Response due to Missile Impact Loading

Krutzik, N. J. and Fila, A. and Kostov, M. and Katona, Tamás János (2001) Improvement of local Resistance of Safety-Related Structures and Reduction of Dynamic Response due to Missile Impact Loading. In: 16th International Conference on Structural Mechanics in Reactor Technology (SMiRT 16), 2001.08.12-2001.08.17, Washington.

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Abstract

Evaluation of the load-bearing and shielding capacity of safety-related structures not designed for missile impact loading (e.g. from aircraft crash) led to problem-specific investigations, conducted with the aim of establishing effective shielding, reinforcing and energy dissipation concepts. To ensure protection of structures against missile impact, emphasis was placed in this study not only on upgrading the penetration resistance of the structures in the impacted area, but also in particular on reducing the dynamic response induced by impact loads. Although a number of shielding concepts exist which are useful in a theoretical sense, only a few of these are of any practical significance due to the rather small region affected by impact loading and the rather high magnitude of the loads. Any shielding concept suitable for protecting a building against the impact of a missile (e.g. aircraft) over its entire outer surface must provide the target with homogeneous protection in the form of a jacket of high strength and high energy dissipation capacity. Of the various concepts investigated, the most promising seems to be that providing protection by means of hollow-wall designs or special shielding elements, both made of energy-absorbing high-quality steel-fiberreinforced concrete [1]. This paper covers studies of different local design concepts for the targeted regions and material parameters which have a strong influence on the penetration resistance as well as energy dissipation capabilities of the impacted building. Possibilities for reinforcing the outer shells of typical buildings not originally designed to withstand missile impact are also presented.

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