Techno Press
Techno Press

Steel and Composite Structures   Volume 19, Number 6, December 2015, pages 1355-1367
DOI: http://dx.doi.org/10.12989/scs.2015.19.6.1355
 
Experiments on locally dented conical shells under axial compression
Tohid Ghanbari Ghazijahani, Hui Jiao and Damien Holloway

 
Abstract     [Full Text]
    Steel conical shells have long been used in various parts of different structures. Sensitivity to the initial geometrical imperfection has been one of the most significant issues on the stability of these structures, which has made them highly vulnerable to the buckling. Most attention has been devoted to structures under normal fabrication related imperfections. Notwithstanding, the challenges of large local imperfections – presented herein as dent-shaped imperfections – have not been a focus yet for these structures. This study aims to provide experimental data on the effect of such imperfections on the buckling capacity of these shells under axial compression. The results show changes in the buckling mode and the capacity for such damaged thin specimens as is outlined in this paper, with an average overall capacity reduction of 11%.
 
Key Words
    conical steel shells; buckling; axial loading; dent; local imperfection
 
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