Dynamic buckling of columns considering shear deformation and rotary inertia

  • Authors:

  • M. Ghorashi

  • Affiliations:

  • Mechanical Engineering Department, Sharif University of Technology, Tehran, Iran

  • Venue:
  • ICAAISE '01 Proceedings of the eighth international conference on The application of artificial intelligence to civil and structural engineering computing
  • Year:
  • 2001

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Abstract

In this paper, the critical load of columns has been investigated by the consideration of shear deformation and rotary inertia. Such an analysis is essential for performing proper evaluation of buckling load of columns made of composite materials and thick columns that are shear sensitive. Both static and dynamic buckling of columns is investigated. It is shown that the shear deformation effect always tends to reduce the buckling load. In this way, ignoring shear deformation in the case of thick columns or columns made of shear sensitive materials would result in unsafe designs. The shear deformation effect is observed to be the same for the static and dynamic loadings, at least for simply supported columns. The consideration of rotary inertia proved that for simply supported columns this phenomenon has no effect on the buckling load.