Abstract
An experimental study was performed to obtain the data about the buckling strength of the column models using new metallic structural material (SA440B) at high temperature. Two kinds of experiments under the centrally compressive load with rectangular cross-sections of thickness lOmm X width 26mm, (1)tests at constant high temperature, and (2), tests at increasingly higher temperature under a constant axial load. By the tests (1), the buckling loads of column models which were enforced axial edge compression at a constant high temperature were examined. And, by the tests (2), the collapse temperatures of the column models at increasingly higher temperature under a constant load were examined. The results of these tests were compared on a chart of buckling curves, and it is observed that the buckling load of the tests(2) was larger than the tests(1) in the region of small slenderness ratio, and the result was reverse in the region of large slenderness ratio. Furthermore, in order to explain this result, numerical analyses were carried out, and the influence of the strain rate and P-Delta effect on the buckling strength of the column models under the elastic-plastic-creep behavior were confirmed.
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