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Prof. Khaled Mohamed El-Sayed :: Publications:

Numerical Investigation on Steel Square HSS Columns Strengthened with Polymer-mortar
Authors: Khaled M. El-Sayed, Ahmed S. Debaiky, Nader N. Khaliland Ibrahim M. El-Shenawy
Year: 2019
Keywords: Finite element; buckling; HSS; column; polymer; mortar
Journal: Advances in Research
Volume: 20
Issue: 4
Pages: 1-25
Local/International: International
Paper Link: Not Available
Full paper Khaled Mohamed El-Sayed_30164-Article Text-56575-1-10-20191228.pdf
Supplementary materials Not Available

This paper presents the results of finite element (FE) analysis of axially loaded square hollow structural steel (HSS) columns, strengthened with polymer-mortar materials. Three-dimensional nonlinear FE model of HSS slender columns were developed using thin-shell element, considering geometric and material nonlinearity. The polymer-mortar strengthening layer was incorporated using additional layers of the shell element. The FE model has been performed and then verified against experimental results obtained by the authors [1]. Good agreement was observed between FE analysis and experimental results. The model was then used in an extended parametric study to examine selected AISC square HSS columns with different cross-sectional geometries, slenderness ratios, thicknesses of mortar strengthening layer, overall geometric imperfections, and level of residual stresses. The effectiveness of polymer-mortar in increasing the column’s axial strength is observed. The study also demonstrated that polymer-mortar strengthening materials is more effective for higher slenderness ratios. An equivalent steel thickness is also accounted for the mortar strengthened HSS columns to discuss the effectiveness of polymer-mortar strengthening system. The polymer-mortar strengthening system is more effective for HSS columns with higher levels of out-of-straightness. Level of residual stress has a slight effect on the gain in the column’s axial strength strengthened with polymer-mortar.

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