Abstract: The mechanical properties of prestressed concrete beam under explosion load is simulated by LS-DYNA. The antiexplosion property of four groups of prestressed concrete beams under explosion load are numerically simulated, the impact of prestress and strength of concrete on the anti-explosion property of beams are investigated. The maximum mid-span displacement, residual mid- span displacement, crack pattern, stress of rebar and the shear stress of concrete near support are analyzed and compared to the unprestressed concrete beams under the same explosion, and the influence rule of prestress on reinforced concrete beams is obtained.

Key words: prestressed concrete beam, explosion load, dynamic response, numerical simulation