Computers and Concrete

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Buckling analysis of embedded concrete columns armed with carbon nanotubes

  • Arani, Ali Jafarian (Department of Civil Engineering, Khomein Branch, Islamic Azad University) ;
  • Kolahchi, Reza (Department of Civil Engineering, Khomein Branch, Islamic Azad University)
  • Received : 2016.01.09
  • Accepted : 2016.03.21
  • Published : 2016.05.25
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Abstract

As concrete is most usable material in construction industry it's been required to improve its quality. Nowadays, nanotechnology offers the possibility of great advances in construction. For the first time, the nonlinear buckling of straight concrete columns armed with single-walled carbon nanotubes (SWCNTs) resting on foundation is investigated in the present study. The column is modelled with Euler-Bernoulli and Timoshenko beam theories. The characteristics of the equivalent composite being determined using mixture rule. The foundation around the column is simulated with spring and shear layer. Employing nonlinear strains-displacements, energy methods and Hamilton's principal, the governing equations are derived. Differential quadrature method (DQM) is used in order to obtain the buckling load of structure. The influences of volume percent of SWCNTs, geometrical parameters, elastic foundation and boundary conditions on the buckling of column are investigated. Numerical results indicate that reinforcing the concrete column with SWCNTs, the structure becomes stiffer and the buckling load increases with respect to concrete column armed with steel.

Keywords

References

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