Study On Structural Stability And Seismic Performance Of Aluminum Alloy Hangar

With the continuous development of our civil aviation industry,more and more large aircraft will be put into use.In order to meet the actual needs of maintaining multiple large aircraft in the hangar at the same time,it is urgent to study roof structures with smaller thickness and greater rigidity to achieve larger spans.The traditional long-span space structure materials are mainly steel or reinforced concrete,and the research results are relatively mature.Aluminum alloy is a new type of material composed of pure aluminum and alloy elements.It is very popular because of its light weight,corrosion resistance and easy processing.Attention,and its application research in the hangar structure is less.This paper mainly takes aluminum alloy single-layer and double-layer cylindrical reticulated hangar structure as the research object,and uses Midas GEN software to study the stability and seismic performance of the aluminum alloy cylindrical reticulated hangar structure.In the analysis of the structural stability of the aluminum alloy cylindrical reticulated shell hangar,different spans,rise-span ratios,and cross-sectional dimensions of rods were established for the single-layer cylindrical reticulated shell and double-layer cylindrical reticulated hangar structure There are more than 100 models,respectively for structural static analysis,linear buckling analysis and nonlinear buckling analysis.The aluminum alloy singlelayer cylindrical reticulated shell hangar structure considers the influence of the rise-to-span ratio,mesh density,boundary support conditions,load distribution pattern,semi-rigidity of the joints and initial defects on the stability of the hangar structure.The aluminum alloy doublelayer cylindrical reticulated shell hangar structure takes into account the influence of the riseto-span ratio,load distribution pattern,reticulated shell thickness and initial defects on the stability of the hangar structure.When analyzing the seismic performance of the aluminum alloy cylindrical reticulated shell hangar structure,dozens of single-layer and double-layer cylindrical reticulated shell structural models with different geometric parameters were established,and five different natural seismic waves were applied through the Midas GEN software.Time history analysis of the structure.In the seismic analysis,the horizontal seismic action,vertical seismic action and three-dimensional seismic action were considered,and the response indexes were compared and analyzed.The aluminum alloy single-layer cylindrical reticulated shell hangar structure takes into account the effects of rise-span ratio,length-span ratio and changes in boundary support conditions on the seismic performance of the structure.The aluminum alloy doublelayer cylindrical reticulated shell hangar structure considers the impact of the rise-to-span ratio,the thickness of the reticulated shell and the changes of initial defects on the seismic performance of the structure.A comparative analysis of the seismic performance of the hangar structure using aluminum alloy and steel was carried out,and the comparative analysis of the seismic response indexes of the two cases under the same structural form and the same design conditions was considered.After numerical simulations,the changes of the structural parameters of the cylindrical net shell hangar structure deflection and linear buckling characteristic value random library structure parameters are summarized,as well as the influence of various influencing factors on the overall stability and seismic performance of the structure.This has an impact on aluminum alloy single-layer and double-layer and double-layer aluminum alloys.The design and selection of the structure of the layered cylindrical reticulated shell hangar has certain reference value.The seismic analysis and comparison between the aluminum alloy hangar structure and the steel hangar structure proves that aluminum alloy can completely replace steel as a bar material for the hangar structure.