Abstract

This paper describes an investigation of local buckling behavior and the local buckling zone of box-section stub-columns subjected to axial compression. In the stub-columns tests, the longitudinal strain of the column is concentrated in the local buckling zone and the strain is not widely distributed along the member axis. In this paper, a series of stub-columns tests is performed to clarify the local buckling behavior of the local buckling zone. The local buckling mode and the length of local buckling zone of the stub-column is measured in detail. Added to this, the theoretical stress-strain curves of stub-columns are derived by plastic hinge analysis. From the experimental and analytical investigation, the length of the local buckling zone of box-section stub-columns is twice as long as the half wave length of the local buckling mode. The deformation capacity of steel member must be estimated considering the local buckling zone.

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