Bending and torsion of cold-formed steel sigma and lipped-channel beams: test database, finite-element analyses and design-calibration code

Abstract

This dataset supports two papers on cold-formed steel sigma (web-stiffened) and lipped-channel beams under combined bending and torsion, one on the calibration of the AISI S100-24 bending-bimoment check from validated shell finite-element analyses and one on the evaluation of that check against tests; their references will be added when they are published. It contains: (A) a database of 96 bending-torsion tests from four laboratories, with section geometry, material properties, loads and the predictions of the design methods and finite-element protocols used in the papers; (B) the registry of the shell finite-element analyses, one row per analysis with its model parameters; (C) the collected results of every analysis (capacity, kind of peak, increment of the peak, section rotation and failure mechanism); (D) the load paths (Abaqus status files) from which the capacities were read; (E) the Abaqus input decks; (F) the design, calibration and statistical code with its tests; (G) the scripts that built, ran, collected and judged the finite-element analyses; and (H) the analysis plans with their hashes, which are also registered on OSF (https://osf.io/vpkdr). A README describes every file, the naming of the analyses, and the units and sign conventions. Data are released under CC BY 4.0 and code under the MIT licence. Abaqus is commercial software and is not included. Version 1.1 (2 October 2026) adds the material produced when both papers were revised after an internal pre-submission review: the revision finite-element runs (plans A-35 and A-35a: uniform moment, small eccentricity, a protocol bridge at 4.5 m and robustness variants) with their input decks, load paths and collected results; the re-analyses of existing results (plan A-36) with their scripts, tests and reports; and the analysis plans A-34a, A-35, A-35a and A-36, which were added to the OSF registration as an update on 2 October 2026. Files of version 1.0 that did not change are carried over unchanged. In total the record contains 3,356 non-linear shell finite-element analyses, each with its input file, its load path (Abaqus status file) and a row in the collected results; 1,628 of them belong to the parametric blocks of the two-family programme (run names beginning SFS_P2). The 7,591 input files include the 3,799 buckling analyses that seed the geometric imperfections. The Abaqus output databases (.odb, about 0.95 TB) are not deposited because of their size; they are kept by the authors with SHA-256 manifests and are available on request.