Elastic Overall Buckling Analysis of Corroded Cold-Formed Thin-Walled Steel Columns
[Objective]The overall elastic buckling performance of corroded cold-formed thin-walled steel col-umns was investigated in this paper.[Method]The finite element eigenvalue buckling analysis method was used to study the effects of corrosion location,corrosion area length and width on the elastic overall buckling of cold-formed thin-walled steel columns.The calculation method for the elastic overall buckling stress of corroded cold-formed thin-walled steel columns was proposed,and the theoretical calculation results were compared with the fi-nite element eigenvalue buckling analysis values.[Result]The results show that as the degree of corrosion in-creased,the elastic bending buckling stress and the elastic bending torsional buckling stress gradually decreased.The effect of web corrosion on elastic bending buckling stress was greater than that of flange corrosion,while the effect of web corrosion and flange corrosion on elastic bending torsional buckling stress was similar.The elastic bending buckling stress gradually decreased with the increase of the corrosion area length,and the rate of de-crease showed a decreasing trend.However,the elastic bending torsional buckling stress approximately linearly decreased with the increase of the corrosion area length.[Conclusion]With the increase of the corrosion area width,the elastic bending torsional buckling stress decreased faster than the elastic bending buckling stress.
corrosioncold-formed thin-walled steeloverall bucklingfinite element analysiselastic
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