Abstract
Precast concrete structures have been widely applied in civil engineering recently due to the better quality, non-pollution, and fast construction. In this study, the finite element model and theoretical analytical model are proposed to study the blast performance of precast concrete slabs under blast load. Firstly, the accuracy of the finite element model is validated by an experiment. Then, the effects of the explosive charge, the thickness of the slab, and the compressive strength of concrete on the dynamic behaviors of fabricated concrete slabs are parametrically investigated. At last, a theoretical analytical model of the precast concrete slab is proposed to predict the maximum deflection under blast load. It is indicated that the failure modes of the slabs are changed from bending failure to shear failure as the explosive charge increases. The thickness, explosive charge, and the compressive strength of concrete have significant influences on the anti-blast performance of the fabricated concrete slab. The theoretical analytical model can reasonably predict the maximum displacement of the precast concrete slab under blast load.
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