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Behavior of thin-walled circular hollow section stub columns under axial compression

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Abstract

Thin-walled steel circular hollow section (CHS) is widely used in wind turbine towers, where the tube is subjected to axial load combined with bending moment. Understanding the behavior of axially loaded thin-walled tubes with large diameter-to-thickness (D/t) ratios is crucial for the design of such structures. To investigate the behavior of axially loaded thin-walled circular hollow section steel tubes, 16 stub columns were tested with the D/t ratio ranging from 75 to 300. The experimental results showed that the compressive strength decreased sharply with the increase of the D/t ratio. The experimental result indicated that the tubes with smaller D/t ratios failed with outward deformation without visible local buckling. With the increase of the D/t ratio, local buckling appeared at the peak load. The finite element method was used to model the behavior of axially loaded stub columns. The experimental results were used to validate the accuracy of the finite element results. Based on the finite element model, the influences of the D/t ratio, the initial geometric deformation and the initial residual stress were analyzed. Design guidelines in Eurocode3, AISC-LRFD, AS4100 and S16-9 on thin-walled steel members were used to compare with the experimental and calculated results. Among them, the results based on AS4100 were the closest to the experimental results.

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Authors and Affiliations

  1. School of Civil Engineering, Harbin Institute of Technology, 73 Huanghe-road, Harbin, 150090, China

    Lanhui Guo, Yong Liu & Shilong An

  2. School of Engineering and ICT, University of Tasmania, 65 Hobart, Tasmania, 7001, Australia

    Hui Jiao

Authors
  1. Lanhui Guo
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  2. Yong Liu
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  3. Hui Jiao
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  4. Shilong An
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Correspondence to Lanhui Guo.

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Guo, L., Liu, Y., Jiao, H. et al. Behavior of thin-walled circular hollow section stub columns under axial compression. Int J Steel Struct 16, 777–787 (2016). https://doi.org/10.1007/s13296-015-0159-0

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  • DOI: https://doi.org/10.1007/s13296-015-0159-0

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