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Numerical Study of the Behaviour of Cruciform Columns Under Axial Compression

Bakhtiary, Ahmad Reza | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42615 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Khansari, Vahid
  7. Abstract:
  8. Due to restrictions on connecting beams to columns in steel structures when moment-resisting connections in two perpendicular directions are employed, the use of ordinary wide-flange sections or fabricated boxes becomes impractical. Application of Cruciform sections, especially when fabricated from two split-I sections (IPE sections) seems to be a reasonable solution to this problem. In this study, using Finite Elements Method and a commercial FEM software, the nonlinear behaviour of a number of cruciform columns, already tested by others, were modeled numerically. After reaching results in acceptable agreement with those of the tests, potentially suitable sections for fabrication of Cruciform Columns, namely IPE sections, were modeled numerically through same methods to find their load-bearing capacities. Moreover, load-bearing capacities of a series of wide flange sections of HE-B type were also worked out. Comparing such capacities with those predicted by the formulae suggested by the AISC code for designing steel columns, showed very good correlation between the two. Furthermore, comparison between capacities of HE-B sections and CPEs (Cruciform sections fabricated from two IPE sections) reveals the superiority of CPE sections over HE-Bs, as far as the unit weight of such sections is concerned
  9. Keywords:
  10. Static Loading ; Buckling ; Cruciform Columns ; Axial Compression ; Numerical Study

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