Assessment of Dynamic Response of 3D Ultra High Performance Concrete Frame Structure under High Explosion Using Johnson-Holmquist 2 Model

摘要: Most of the 3D frame structures are not initially designed to resist blast loads. Due limitation financial resources as well complex technical requirements, study dynamic behavior structure under load, particularly for advanced materials like Ultra High Performance Concrete (UHPC), faces many challenges. Therefore, numerical simulation can be a good alternative. The objective research is investigate UHPC building subjected loading through 3-D model with direct load. This studied in this paper real, 6-story office Vietnam, which was originally dead live wind, and earthquake. surface 500kg Trinitrotoluen (TNT) equivalent charge weight close-in distance variable height source. In study, Johnson-Holmquist 2 damage (JH-2) implemented simulate loading. Base on theory JH-2 model, subroutine, integrated Abaqus software, by authors calibrate input parameters material. A total 8 cases explosion scenario considered, design original column revised using composite external columns. results indicate that there tremendous increase response when occurs at mid-height severe observed front explosion. obtained result terms wave pressure during time history peak deflections assessed. resistance effect compared also demonstrated beneficial alternative blasting condition.