TY - JOUR
T1 - Effect of access openings on the buckling performance of square hollow section module stub columns
AU - Singh, Tekcham Gishan
AU - Chan, Tak Ming
N1 - Funding Information:
The authors sincerely acknowledges the support from the Innovation and Technology Fund - Nano and Advanced Materials Institute (ITF-NAMI) for the project “Hong Kong Modular Integrated Construction (MiC) Innovations“(PolyU/ZS12) and from the Chinese National Engineering Research Centre for Steel Construction (Hong Kong Branch) at The Hong Kong Polytechnic University .
Publisher Copyright:
© 2020 Elsevier Ltd
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2021/2
Y1 - 2021/2
N2 - This paper presents a systematic finite element (FE) based parametric study to quantify the buckling capacity of perforated cold-formed and hot-rolled steel module column. The effects of various key geometric parameters such as eccentricity (location of perforation/column length), shapes (viz. circular, square and hexagonal), sizes (width/diameter) and height (depth) of perforation; and cross-sectional thickness, on the buckling performance of cold-formed and hot-rolled steel stub columns, have been investigated. Based on the analysis, the reduction in column capacity is found to be maximum when the perforation is located at column mid-height, as anticipated. The perforation shapes under consideration have been found to have marginal impact on the buckling capacity of the module stub columns, although the reduction in column capacity is seen to be in the order – square > hexagon > circular perforated columns (having same perforation size). The critical buckling capacity of perforated module column is observed to be linearly decreasing as the perforation size ratio (perforation size/flat-element width) increases. However, for the same width of perforation, increasing the perforation height up to 2.5 times the perforation width, the change in column capacity is found to be negligible. Furthermore, the applicability of existing design for perforated columns has been assessed and found that, although most of the design equations generate conservative and reliable predictions both for cold-formed and hot-rolled steel, the design formulae which are based on effective width method are found to be more accurate as compared to those which are based on total area method.
AB - This paper presents a systematic finite element (FE) based parametric study to quantify the buckling capacity of perforated cold-formed and hot-rolled steel module column. The effects of various key geometric parameters such as eccentricity (location of perforation/column length), shapes (viz. circular, square and hexagonal), sizes (width/diameter) and height (depth) of perforation; and cross-sectional thickness, on the buckling performance of cold-formed and hot-rolled steel stub columns, have been investigated. Based on the analysis, the reduction in column capacity is found to be maximum when the perforation is located at column mid-height, as anticipated. The perforation shapes under consideration have been found to have marginal impact on the buckling capacity of the module stub columns, although the reduction in column capacity is seen to be in the order – square > hexagon > circular perforated columns (having same perforation size). The critical buckling capacity of perforated module column is observed to be linearly decreasing as the perforation size ratio (perforation size/flat-element width) increases. However, for the same width of perforation, increasing the perforation height up to 2.5 times the perforation width, the change in column capacity is found to be negligible. Furthermore, the applicability of existing design for perforated columns has been assessed and found that, although most of the design equations generate conservative and reliable predictions both for cold-formed and hot-rolled steel, the design formulae which are based on effective width method are found to be more accurate as compared to those which are based on total area method.
KW - Cold-formed and hot-rolled steel
KW - Design equations
KW - Finite element analysis
KW - Local buckling
KW - Module column
KW - Perforation eccentricity
KW - Perforation height
KW - Perforation shape
KW - Perforation size
KW - Perforation/cut-outs/holes
UR - http://www.scopus.com/inward/record.url?scp=85096178156&partnerID=8YFLogxK
U2 - 10.1016/j.jcsr.2020.106438
DO - 10.1016/j.jcsr.2020.106438
M3 - Journal article
AN - SCOPUS:85096178156
SN - 0143-974X
VL - 177
JO - Journal of Constructional Steel Research
JF - Journal of Constructional Steel Research
M1 - 106438
ER -