Calibration of equivalent geometric imperfections for second‐order theory analysis of hot‐rolled U‐profiles
Year: 2025
Type: article
Abstract: The stability behaviour of steel structures is important when performing design. Standards (such as EN 1993‐1‐1 – Eurocode 3 Part 1‐1) take the stability of steel members into account and allow for verifications using reduction factors or by second‐order theory analysis considering equivalent geometric imperfections. Eurocode 3 is well‐suited for I‐profiles as the reduction factors and equivalent geometric imperfections have been calibrated using experimental and numerical data for this profile type. However, when it comes to U‐profiles, the standard lacks clear specifications. In literature, some authors have studied the stability behaviour of U‐profiles. For example, the imperfections required for performing a detailed geometrically and materially nonlinear analysis with imperfections included (GMNIA), as well as the residual stresses for U‐profiles, have been studied. Nevertheless, there are still gaps to be addressed, such as the equivalent geometric imperfections for second‐order theory analysis (GNIA). In this paper, the lateral torsional buckling capacity of U‐profiles is determined by GMNIA, with explicit residual stresses definition, and subsequently, corresponding equivalent GNIA are calibrated and proposed.
Source: Steel Construction
DOI: 10.1002/stco.70008
Authors: Stalin Ibanez, Caridad Moscoso, Matthias Kraus
Institution: Bauhaus-Universität Weimar
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,300
OpenAlex ID: W4417159044