Column Strength of ERW Pipes Considering Hysteretic Plastic Strasins in Their Manufacturing Processes

Abstract

The hysteretic plastic strains in the manufacturing processes of ERW pipes bring about the charge of yield stress from their original value. Such changes have many effects on the ultimate strength of ERW members. This report presents column strength of ERW pipes and. several kinds of equivalent yield stresses those are calculated by the simulation of manufacturing processes of them. The standard stresses, such as nominal yield stress, actual yield stress and several kinds of equivalent yield stresses, are applied to column strength evaluation and examined.