Abstract
A procedure to investigate the effect of work-hardening properties of steel on the deformability of welded frame-structures having the H-shape section is described. The procedure consists of the elasticplastic deformation analysis and the local buckling analysis. The analytical results have proved to agree with the experimental results. The deformation analyses of the H-shape beam were carried out for the various combinations of the yield to tensile ratio and the uniform elongation of steel.
It has been shown from the analytical results that it improves the deformability of H-shape beams, such as the amount of deformation or the absorbed energy up to the maximum load, to lower the yield to tensile ratio or to enlarge the uniform elongation of steel. In case of steels having larger uniform elongation (εT>10%), it is more effective to lower the yield to tensile ratio than to enlarge the εT. Whereas in case of steels having smaller uniform elongation (εT<10%), increasing the εT is more beneficial.
