Relation between Welding Parameters of a Beam Section and Its Buckling Strength

摘要

Standardized curves for the calculation of buckling strength are called into question. These curves pertain to different structural members, such as beams and plates. It is demonstrated that for certain fabrication conditions, i.e., manual welding, particularly of I beams, these dimensioning curves give unreliable specifications. The analytical determination of the residual stress distribution in a welded I beam is considered. The evolution of the stress field in a plate being welded is described. Both thin and thick welded plates are dealt with. The method is applied to arrive at parametrical results for the buckling strength of welded sections, allowing the real safety factor to be determined for the defined distribution of welding parameters and cross sections. Complete relations for the calculation of residual stress in various structural profiles are shown.