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Determination of Critical Load in a Nonuniform Circular Steel Column under the Eccentric Axial Load

Author

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  • Stanislav Kotšmíd
  • Chang-Hung Kuo
  • Pavel Beňo

Abstract

The purpose of this paper is to determine a critical load for a nonuniform circular steel tube under eccentrically axial load. The circular tube has variable cross section at flattened ends with existing holes used for connection between members. Three different cases of eccentricities are studied with the drilled holes either on the same side or on the opposite side of column axis. The critical load is calculated from the differential equation of deflection curve which is solved by the power series and Runge-Kutta method. In addition, the loading tests were performed on a total of 180 specimens with different diameters, slenderness, and connection. The calculated results are compared and shown in a good agreement with those obtained from the experimental results. The results also show that the critical load decreases rapidly even at a small value of eccentricity and thus may have a significant effect on the load-carrying capacity.

Suggested Citation

  • Stanislav Kotšmíd & Chang-Hung Kuo & Pavel Beňo, 2016. "Determination of Critical Load in a Nonuniform Circular Steel Column under the Eccentric Axial Load," Mathematical Problems in Engineering, Hindawi, vol. 2016, pages 1-9, July.
    • Handle: RePEc:hin:jnlmpe:5987083
    DOI: 10.1155/2016/5987083
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