Application of steel fiber concrete in small box girder under vehicle explosion load

In recent years, the exceptional performance of steel fiber-reinforced concrete in blast and impact resistance has garnered widespread recognition, sparking considerable interest its practical application small box girders. To this end, nine groups Trinitrotoluene (TNT) explosion simulation experiments were designed with equivalent magnitudes matching those actual automobile explosions to evaluate anti-explosion anti-penetration capabilities ordinary using Arbitrary Lagrangian-Eulerian (ALE) method Smoothed Particle Hydrodynamics-ALE method. The aim was explore prospects research results demonstrate that increasing TNT equivalent, leading cause breach slabs changes from spalling cratering. penetration is superior resistance. However, when explosive force larger than sedan, effect becomes negligible. Moreover, under typical loads, addition 2% fibers can reduce by up 23% cratering 13% decrease area damage 47%. designing blast-resistant structures, not recommended enhance bridges exceeds 500 kg.