Contribution of Corrugated Steel Plate on the Blast-Resistance Performance of Steel-Concrete Composite Panels

Corrugated steel-concrete-steel (CSCS) panels have considerable potential for resisting blast loads. They replace flat steel plates of steel-concrete-steel (SCS) panels with corrugated steel plates on the protected side. In this study, a finite-element model (FEM) of the CSCS panel was developed using LS-DYNA version R8 and validated by the blast tests reported in the literature. The calculated results indicated that the dynamic response of the CSCS panel was significantly different from that of the SCS panel as well as the damage modes of the panels. Three failure modes were observed in the CSCS panels subjected to blast loads. The influences of the structural parameters such as the flute spacing, flute angle, thickness of the corrugated steel plate, steel strength, and bonding strength were determined based on the developed FEM. It was found that the flute spacing had a minor effect on the damage to CSCS panels exposed to blast loads. In contrast, the blast-resistance performance of the panels significantly improved by increasing the flute angle, thickness, and strength of steel. The flute angle of the corrugated steel panel had the most significant contribution to the blast resistance of CSCS panels. The use of high-strength steel is not recommended for fabricating the CSCS panels. Also, the bonding strength remarkably influenced the damage and the energy absorption mechanism of the CSCS panels.