Akademik Veri Yönetim Sistemi
Journal of innovative engineering and natural science (Online), cilt.4, sa.2, ss.326-353, 2024 (Hakemli Dergi)
The aim of this rigorous parametric study is to
explore the influence of perforations on the local buckling behavior of square
hollow sections (SHSs) possessing non-uniform wall thickness. A finite element
procedure followed in the current study has been first validated against
existing test results documented for the local buckling behavior of the
perforated SHS with uniform web and flange segment thickness under axial
compression. The linear elastic eigenvalue buckling and elastoplastic buckling
analyses have been implemented using the Abaqus engineering finite element
code. The verification of the numerical procedure has been achieved by
favorably comparing the finite element results with the existing test results
in terms of the first local buckling mode shape and load-end shortening curves
of the perforated SHS with uniform wall thickness. . The verified numerical
procedure has been applied to the problem of finding the perforation effect on
the local buckling response of the SHS with non-uniform thickness. Finite
element analyses have been performed for four various web width-to-perforation
diameter ratios ranging from 0.3 to 0.9.
Finite element analysis results have revealed that the presence of
perforations does not influence the local buckling mode shape of the SHS but
considerably affects the critical local buckling loads. The results have put
forth that increasing perforation diameter leads to a more pronounced and
drastic decrease in the critical local buckling load. The outcomes of the study
have also shown that the critical post-buckling load of the SHS with
non-uniform wall thickness is less susceptible to perforations compared to the
SHS with uniform wall thickness. The results obtained in the context of this
parametric study have been made available to practical engineering for use in
actual design of the perforated SHSs.