Study on the protective performance of polymer layer to RC slabs under underwater explosions

Abstract

Under the action of underwater explosion load, the reinforced concrete structure is easily destroyed, and the structure has the risk of overall instability. Therefore, it is proposed to arrange a polymer protective layer at the outside of the structure to achieve the effect of reducing the degree of damage. In this paper, field explosion tests were carried out on normal reinforced concrete (RC) slabs and reinforced concrete slabs with polymer protective layers (PRC). The dynamic responses and failure modes of the two slabs under different explosion loads were studied, and the protective performance of polymer layer was compared and analyzed. Numerical models were established based on the CEL method, and the numerical simulation can well reproduce the damage results of the specimens. Based on numerical simulations, the effects of charge mass on the failure modes, surface damage, and residual displacement of the kinds of two slabs were deeply studied. And the influence of charge mass and thickness on the protective effect of polymer layer was discussed. The results show that the polymer protective layer can reduce the explosion energy, reduce the damage and deformation of the slab, and effectively improve the anti-explosion performance of the RC slab.