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September 17, 2026Frontiers in Built EnvironmentOpen Access

Numerical investigation and strength prediction of core-enhanced cold-formed steel hexagonal columns

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Authors

KSKavya SomasundaramKRK. S. K. Karthik Reddy

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Overview

Finite element analysis demonstrates improved buckling resistance and axial capacity in core-enhanced cold-formed steel hexagonal columns, indicating more reliable structural design equations.

Key Points

  • Investigate the structural performance and axial compression capacity of core-enhanced cold-formed steel hexagonal columns and formulate modified predictive design equations.
  • Constructed a nonlinear finite element model accounting for material nonlinearity, geometric imperfections, and boundary conditions to build a database of 154 column models.
  • Conducted a parametric study varying wall width, thickness, slenderness ratio, and core configuration to evaluate ultimate capacity and buckling failure modes.
  • Incorporating internal stiffeners and an inner core enhanced local buckling resistance and raised axial load-carrying capacity relative to unstiffened hollow hexagonal columns.
  • Structural failure modes were predominantly dictated by local buckling and interacting local-global buckling mechanisms.
  • Modified formulations for the Effective Width Method and Continuous Strength Method demonstrated strong agreement with numerical simulations, yielding prediction-to-result ratios near unity with reduced scatter.

Cite This Study

Somasundaram et al. (2026) studied this question.

synapsesocial.com/papers/6aabb61e5f706d05830e4939https://doi.org/10.3389/fbuil.2026.1933880
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