Research on Hybrid FRP–Steel-Reinforced Concrete Slabs under Blast Load

The service environment of civil air defense engineering structures is relatively harsh, and the corrosion steel bars main reason for reducing durability concrete in engineering. A hybrid FRP–steel-reinforced (hybrid-RC) structure has excellent durability. Therefore, it a good choice to apply hybrid-RC structures. In order study blast resistance structures, close contact experiments were carried out on slabs, steel-reinforced (SRC) slabs GFRP-reinforced (GRC) slabs. For experiment, reinforcement SRC slab first entered plasticity stage, whereas GFRP was elastic stage under blast. capacity dissipate energy through vibration better than that slab. residual deformation after experiment smaller Blast Recovery Index (BRI) introduced evaluate recovery blast, damage assessment criteria proposed according maximum support rotation θm BRI. There little difference size local However, since still plastic ratio bearing original would be larger prediction formula top face diameter D blasting depth L obtained dimensionless analysis. This research can provide reference anti-blast design