Backbone M-θ for HSS Columns

Lengths in mm, E and fy in MPa. b is not used by the underlying model — it's shown only for reference, same as in the original app. To use a different section database:

Column cross-section [mm]

Response results

About: HSS column model

What this tool does

Predicts the moment–rotation (M-θ) backbone of steel beam-columns with hollow structural sections (HSS) from the cross-section, member length, axial load ratio, material properties and boundary conditions, using the component model of Hartloper et al. (2026). You can save each plot as PNG or SVG and the curve data as CSV.

Author and contact

Developed by Dr Ahmed Elkady, University of Southampton. Email: a.elkady@soton.ac.uk · Homepage

How to cite

Disclaimer

These tools are provided for research and educational purposes only, without warranty of any kind. The predictions are estimates from the cited models and are only as reliable as those models within their validity ranges. Results should be checked independently by a qualified engineer before being used in design or assessment.

© 2026 Ahmed Elkady, University of Southampton. All rights reserved.