Dynamic Response Analysis Of Tube-truss Structure Under Explosion Load

The large-span spatial structures are very important sites for people's activity,whose security greatly influences people's life and property.Due to the serious security situation of the world, the bomb attack and accidental explosion is obviously more than before.If the space structure suffers the blast load, it will be seriously damaged and even collapse.Generally, in China, the reseach of sustainable design and aseismatic design of the building structure is more comprehensive and in-depth. The design of the temporary design and occasional design of the building structure is relatively lag behind, especially for accidental design, For most of the building were not designed for accidental design situation. So the research on dynamic response and failure mode under the blast loads are very meaningful to evaluate the structure's safety and take the defense measure against accidental explosion and territories'attack.This paper studied a tube-truss of a typical roof structure based on systematic research of dynamic analysis and explosion of tube-truss. To utilize nonlinear dynamic finite element analysis software ANSYS/LS-DYNA, analyzing and discussing effects of dynamic response of tube-truss structure under different ratio of damping, equivalent roof mass, bearing type when explosion hapeened indoor and outdoor. Obtain the main parameters of Explosion Resistance design and the weak position of the structure, to provide a theoretical basis to ensure building safety.