Research On Axial Compression Stability Of H-shaped High Strength Aluminum Alloy Column

With the rapid development of the construction industry,the application of aluminum alloy structures has gradually been widely used,and at the same time the requirements for aluminum alloy materials have also increased.There are many similarities between aluminum alloy structure and steel in terms of mechanical properties.It has the advantages of light weight,high strength,super corrosion resistance,beautiful appearance,good weld ability and plasticity,but it is stable in structure and Problems such as component deformation are more prominent.In the life or construction process,holes are often opened in the aluminum alloy structure due to decoration,wiring,pipes,etc.,and the different opening forms will have different effects on the buckling failure mode and axial pressure properties of the aluminum alloy structure.At present,the research on the mechanical properties of the axial compression stability of aluminum alloy components at home and abroad is mainly focused on solid-web section members,and there are relatively few researches on the mechanical properties of the axial compression members of the high strength aluminum alloy column with openings.Therefore,it is necessary to study the axial compression stability of high-strength aluminum alloy columns with openings.Since the H-shaped section is widely used in engineering,this paper selects the open-hole high-strength H-section aluminum alloy axial compression member as the research object to study and analyze its buckling failure mode and mechanical stability.This paper mainly uses ABAQUS finite element numerical simulation to study the mechanical properties of open-hole H-shaped high-strength aluminum alloy axially compressed members.Finite element models are established for members with three column lengths of 700 mm,1000 mm and 1400 mm,and the aluminum alloy is accurately simulated.The buckling failure mode and ultimate bearing capacity of the component,through the comparison and analysis of the numerical simulation results,it can be seen that the existence of holes will change the buckling instability mode of the aluminum alloy structure and reduce the bearing capacity of the member;the increase of the aperture will further weaken the web of the component The rigidity of the plate leads to a further reduction in the ultimate bearing capacity;different opening forms have different effects on the deformation degree of the components.The deformation degree of the components with oval and rectangular holes is significantly greater than that of round and square holes,the increase in the aperture will also increase the deformation of the component;in general,the existence of voids has an impact on the buckling mode and ultimate bearing capacity of aluminum alloy members,but with the increase of column length,its influence gradually decreases.On the basis of aluminum alloy related design specifications,combined with relevant domestic and foreign calculation methods,the calculation formula of the ultimate bearing capacity of aluminum alloy opening members is proposed.The results of the formula proposed in this article are compared with the results of the finite element numerical simulation,the two results are basically consistent and the calculation formula in this article is safe and reliable.Figure[28]table[11]reference[54]...