RESEARCH ARTICLE


Analysis on Calculated Length for Buckling Stability of Steel Pipe Pile Based on Energy Method



Wei Lu*, Dong Zhao
School of Civil Engineering and School of Science, Xi'an University of Architecture and Technology, Xi’an, 710055, China


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Creative Commons License
© 2017 Lu and Zhao

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the School of Civil Engineering and School of Science, Xi'an University of Architecture and Technology, Xi’an, China; Tel: +86 17791679289; E-mails: reed_xauat@163.com, 281081454@qq.com


Abstract

According to the Winkler assumption, the form of the pile constraint could be simplified as bottom fixing and top free. Considering the influence from resistance of soil around pile, the equations on calculated length for buckling stability of steel pipe pile when the portions along the pile length were constrained in the uniform foundation and the layered foundation were respectively derived based on energy method and variational principles. And the application of the formulas was explained through examples. The equations are successfully applied in similar projects.

Keywords: Steel pipe pile, Buckling stability, Energy method, Variational principle, Foundation, Energy.