Experiments on channel columns with inclined simple edge stiffeners under compression loading

2007, Volume 1, Issue 3

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Frontiers of Structural and Civil Engineering >> 2007, Volume 1, Issue 3 doi: 10.1007/s11709-007-0041-z

Experiments on channel columns with inclined simple edge stiffeners under compression loading

School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;

Available online: 2007-09-05

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Abstract

In order to investigate the compression behavior of pin-ended cold-formed channel columns with inclined simple edge stiffeners, a total of 30 pin-ended cold-formed channel columns with three sections (sloping lip stiffener turned at 45º, 90º, and 135º to the flange, respectively) and three different lengths (500 mm, 1 250 mm, and 2 000 mm) were tested. It was found that the inclination angles and loading positions have an obvious effect on compression ultimate load-carrying capacities and failure modes. All three sections have certain post-buckling strength, and the failure modes of most of the specimens contained distortional buckling. The capacity of the specimens with 45º inclined angle for bearing compression is appreciably higher than the other two types of specimens with 90º or 135º inclined angles at the same negative eccentricity, but obviously lower than the other two at the same positive eccentricity. Furthermore, tests were simulated by finite element analysis. Results from the analysis are in great agreement with the experimental data.

Keywords

different ; post-buckling strength ; capacity ; distortional buckling ; Furthermore

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