판구조물의 절단에서 발생하는 잔류변형을 적용한 용접해석

Abstract

Cutting and welding are essential processes in constructing complex steel structures. In these processes, local heating and cooling generate strains and stresses in the cut and welded areas, resulting in deformation of the entire structure. To accurately predict the welding deformation of the model, it is necessary to consider the effects of previous cutting. In this study, thermal conduction analysis was used to derive the temperature history via cutting and bead-on-plate welding. Additionally, temperature history was applied to thermal–elastic–plastic analysis of welds while cutting. When applied to large structures, a simplified analysis was performed. Thus, the thermal–elastic– plastic analysis results were applied in a shell structure as equivalent shrinkage and moment, and elastic analysis was performed. Through this study, it was confirmed that cutting influenced the final welding deformation. Further, the suitability of the simplified method for analyses of large structures was verified.