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 Sina Toosi,Akbar Esfandiari,Ahmad Rahbar Ranji.Buckling Analysis of Tapered Continuous Columns by Using Modified Buckling Mode Shapes[J].Journal of Marine Science and Application,2019,(2):160-166.[doi:10.1007/s11804-019-00085-7]
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Buckling Analysis of Tapered Continuous Columns by Using Modified Buckling Mode Shapes


Buckling Analysis of Tapered Continuous Columns by Using Modified Buckling Mode Shapes
Sina Toosi Akbar Esfandiari Ahmad Rahbar Ranji
Sina Toosi Akbar Esfandiari Ahmad Rahbar Ranji
Department of Ocean Engineering, AmirKabir University of Technology, Tehran 25529, Iran
Buckling analysisTapered columnContinuous columnsFinite element methodModified buckling mode shapes
Elastic critical buckling load of a column depends on various parameters, such as boundary conditions, material, and crosssection geometry. The main purpose of this work is to present a new method for investigating the buckling load of tapered columns subjected to axial force. The proposed method is based on modified buckling mode shape of tapered structure and perturbation theory. The mode shape of the damaged structure can be expressed as a linear combination of mode shapes of the intact structure. Variations in length in piecewise form can be positive or negative. The method can be used for single-span and continuous columns. Comparison of results with those of finite element and Timoshenko methods shows the high accuracy and efficiency of the proposed method for detecting buckling load.


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Received date:2017-7-19;Accepted date:2018-9-27。
Corresponding author:Sina Toosi
Last Update: 2019-07-06