Steel and Composite Structures

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Vibration behaviour of axially compressed cold-formed steel members

  • Silvestre, N. (Department of Civil Engineering, IST/ICIST, Technical University of Lisbon) ;
  • Camotim, D. (Department of Civil Engineering, IST/ICIST, Technical University of Lisbon)
  • Received : 2005.04.18
  • Accepted : 2005.12.21
  • Published : 2006.06.25
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Abstract

The objective of this work is to describe the main steps involved in the derivation of a GBT (Generalised Beam Theory) formulation to analyse the vibration behaviour of loaded cold-formed steel members and also to illustrate the application and capabilities of this formulation. In particular, the paper presents and discusses the results of a detailed investigation about the local and global free vibration behaviour of lipped channel simply supported columns. After reporting some relevant earlier GBT-based results dealing with the buckling and vibration behaviours of columns and load-free members, the paper addresses mostly issues concerning the variation of the column fundamental frequency and vibration mode nature/shape with its length and axial compression level. For validation purposes, some GBT-based results are also compared with values obtained by means of 4-node shell finite element analyses performed in the code ABAQUS.

Keywords

References

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