Dynamic Response Analysis Of Typical Frame Structures Under Explosion

At present,the dynamic response analysis of reinforced concrete frame structures is always a primary and important subject in the analysis of explosion accidents,structural anti explosion design,anti terrorist attacks and military fields.With the use of explosives by terrorists more and more widely,the spread of terrorism intensified,peace and tranquility of terrorist bombings on the international community caused great threat,which has a great influence to human life and property safety.In this paper,the dynamic response of a typical four story frame structure subjected to external explosion and internal explosion is analyzed:1.The simulation of the existing experiment,the validity of the parameters of the finite element model,the size of the grid element and the value of the calculated parameters are verified.The calculation results show that the finite element mesh of the frame structure can be carried out by using the Hyper Mesh method,and the mesh size and material model used in the calculation are applicable.2.Frame structure finite element model,the calculation of column and beam,floor,wall and other components in response to external explosion under explosion and blasting vibration response after the analysis of the explosion distance of frame structure,frame column,wall stress,displacement and acceleration effect.3.Finite element analysis of the frame structure under internal explosion is conducted to consider the effect of different explosive quantities on the structural explosion response.For the floor of blasting face,the greater the amount of explosive,the greater the damage and the corresponding acceleration,velocity and displacement of the blasting face.But for the floor which is not affected directly by the blast wave,the response of damage and displacement is different from the response of the detonation surface.The deformation coordination effect and the wave vibration effect of the beam column and other components are affected.By studying the dynamic response of frame structure under external explosion and internal explosion,the parameters of blasting damage assessmentfor building structures can be provided,which can provide reference for explosion protection and anti explosion protection of Engineering structures.