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Advanced numerical simulations on S690 cold-formed square hollow sections under compression.
- Source :
-
Journal of Constructional Steel Research . Jan2024, Vol. 212, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- Based on a number of numerical investigations into welding simulations, highly non-linear welding-induced residual stresses within high strength S690 welded H-sections have been evaluated successfully, and surface residual stresses along their flange / web junctions have been carefully calibrated against measured data. This modelling technique has been extended to cover residual stresses of cold-formed circular hollow sections recently, and also of cold-formed square hollow sections as described in this paper. Hence, a full presentation on the proposed approach of integrated and coordinated numerical simulations on various mechanical, heat transfer and thermomechanical, and stresses analyses on these cold-formed square hollow sections is described. Subsequent structural analyses of these models on both stocky and slender columns of these cold-formed square hollow sections are then carried out. Structural adequacy of the proposed approach is thoroughly demonstrated through a systematic calibration against various measured data – both temperatures and residual stresses of these sections induced during fabrication, and load-deformation curves of these sections under compression. It should be noted that the proposed approach provides a scientific mechanism to determine directly residual stresses due to transverse bending and longitudinal welding as initial materials imperfections in these high strength S690 cold-formed square hollow sections. With an adoption of the lowest eigenmodes of these columns as their initial geometric imperfections after adjusted with measured or design values of the member out-of-straightness, both the effects of initial materials and of initial geometric imperfections onto the structural performance of these columns are readily quantified separately. [Display omitted] • An integrated and coordinated numerical simulation approach is developed. • Fabrication-induced effects of cold-formed square hollow sections are considered. • Both residual stresses and strains are incorporated into the structural models. • All of the models have been calibrated with measured results of stocky and slender columns. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0143974X
- Volume :
- 212
- Database :
- Academic Search Index
- Journal :
- Journal of Constructional Steel Research
- Publication Type :
- Academic Journal
- Accession number :
- 173889637
- Full Text :
- https://doi.org/10.1016/j.jcsr.2023.108303