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Investigation of vibration and stability of cracked columns under axial load
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  • Journal title : Earthquakes and Structures
  • Volume 9, Issue 6,  2015, pp.1181-1192
  • Publisher : Techno-Press
  • DOI : 10.12989/eas.2015.9.6.1181
 Title & Authors
Investigation of vibration and stability of cracked columns under axial load
Ghaderi, Masoud; Ghaffarzadeh, Hosein; Maleki, Vahid A.;
In this paper, an analytical method is proposed to study the effect of crack and axial load on vibration behavior and stability of the cracked columns. Using the local flexibility model, the crack has been simulated by a torsional spring with connecting two segments of column in crack location. By solving governing eigenvalue equation, the effects of crack parameters and axial load on the natural frequencies and buckling load as well as buckling load are investigated. The results show that the presents of crack cause to reduction in natural frequencies and buckling load whereas this reduction is affected by the location and depth of the crack. Furthermore, the tensile and compressive axial load increase and decrease the natural frequencies, respectively. In addition, as the compression load approaches to certain value, the fundamental natural frequency reaches zero and instability occurs. The accuracy of the model is validated through the experimental data reported in the literature.
cracked column;stability;critical buckling load;natural frequency;vibration analysis;
 Cited by
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