Abstract
This paper reports the test results of composite columns subjected to compression or bending in order to investigate the properties of ultimate strength of concrete filled rectangular steel columns with thin-walled steel plates.
In the compression tests of composite columns, the effects of headed studs and longitudinal stiffeners on the behaviors in elasto-plastic regions are examined experimentally in comparisons with the concrete filled columns without headed studs and longitudinal stiffeners. Their ultimate strengths are, then, discussed on the basis of theoretical analysis. On the other hand, the influences of end diaphragms and studs, which restrain the slips between encased concrete and steel tubular plates, upon the composite effects and the corresponding ultimate strength for flexural behaviors are also examined by means of the bending tests.
