Study on impact resistance of lightweight steel structural materials for reinforcement of high-rise buildings
Due to the frequent use of lightweight steel structures in reinforced high-rise buildings,it is of great significance to study their structural stability under impact loads.In this paper,a high-rise building with light steel structure reinforcement and elevation construction was studied.The finite element model was constructed with Ansys finite element software,and the elements were selected and the grid was divided.The impact load was set in the software,and the deformation of the model in three impact stages was tested based on the finite element model.The impact time history curves of different impact times were drawn,the influence of impact velocity on structural displacement was calculated,and the stress nephogram of beam and column was generated.The results show that after three impact stages,the lightweight steel structure model has obvious deformation but does not collapse,which can resist high impact force.In the later period of impact,the impact force is decreasing,and the impact force at the column end of light steel structure is higher.When the impact velocity is 75 m/s,the maximum displacement of the structure is close to 0.55 m.Although the structure deforms,the impact energy is absorbed and no collapse occurs.At the peak of impact,the end stress of the light steel structure column increases obviously,but there is no serious deformation,and it has high impact resistance.
万方数据
维普
