In order to obtain the anti-blast performance of polyisocyanate-oxazodone (POZD) coated reinforced concrete beams under contact explosion, numerical simulation studies were carried out on reinforced concrete beams of the same size. Hypemesh and LS-DYNA were used to establish the model of POZD-coated reinforced concrete beams, and the failure modes and damage effects of POZD-coated reinforced concrete beams under contact explosion were analyzed. The failure mode of ordinary reinforced concrete beams under contact explosion was simulated and verified, the failure modes and damage conditions of reinforced concrete beams under different POZD coating positions and different charge amounts were studied, and the protective effects of different POZD coating positions were evaluated.

In order to investigate the dynamic response process, damage characteristics and damage mode of polyurea coated masonry infill walls with built-in tie reinforcement under close-range explosion load, a series of close-range explosion tests were performed on masonry wall with different polyurea coating methods and thicknesses. Additionally, numerical studies were carried out using the LS-DYNA software. Based on the resistance function of the brick wall, steel bar and polyurea coating, an improved equivalent single degree of freedom (ESDOF) theoretical calculation model was established. This model can accurately describe the displacement response of the polyurea coated masonry infill walls with built-in tie reinforcement under close-range explosion load. Three damage modes: surface mortar layer damage, open pit dislocation with back bulge, and penetration damage were identified according to the wall’s out-of-face response characteristics during close-range explosion load. With the increase of the number of tension reinforcement, the anti-explosion performance of the wall improves and the critical penetration damage charge increases.