Study On The Stability Of Single-layer Reticulated Domes With Top Opening

Single-layer reticulated domes is a kind of beautiful and reasonable space steel structure,which is widely used in large stadiums,exhibition centers,airport hangar,large entertainment venues and other public buildings.Most of the load borne by the structure is transferred through the axial force of the rod,which is similar to the loading characteristics of the thin film.With the requirement of building daylighting,ventilation and energy consumption continues to increase,the single-layer reticulated dome with the top opening has been used more and more.Due to the presence of the top opening,the axial force transfer in the structure is partially blocked,and the "thin film" effect has been weakened.In this paper,the single-layer reticulated dome with the top opening has been studied.Based on the whole process dynamic incremental method(IDA),the finite element analysis software ANSYS is used for numerical analysis,and the dynamic stability of single-layer reticulated dome with top opening has been studied.Here are main jobs this paper has done:1.According to the curved surface characteristics of Single-layer reticulated domes,the corresponding parametric modeling program is developed by using language APDL in ANSYS,and the automatic and parametric modeling of single layer reticulated domes with top opening is implemented;2.According to the single-layer reticulated domes with top opening,the natural vibration frequency and mode of structure has been analyzed under the condition of different ratio of rise to span,and studied the natural vibration rule of that structure;3.According to the 3D seismic action,the dynamic stability of the top opening of single-layer reticulated domes has been analyzed by using the method of IDA.The dynamic stability of the structure under different conditions was revealed by the parametric study of the ratio of rise to span,the size of the opening,and the support form.The method of local reinforcement of the opening of this structure has been explored.The research results of this paper can provide theoretical basis for practical engineering design.