Abstract
The cold-formed steel members often require web openings to save interior space and allow for building services such as mechanical piping, electrical wiring, and air conditioning systems. Stress distribution in members with openings is different from members without holes, and therefore, their characteristics, shape, and modes of buckling are dissimilar which results in distinct behavior that could increase or decrease elastic buckling capacity and ultimate strength. In this study, analytical solutions for the local buckling of cold-formed steel webs with rectangular holes subjected to compression, bending and their combination are developed and summarized. The effects of flanges and other forces such as shear and torsion are not considered. The main variables are height of openings to height of web, aspect ratio of openings, and stress distribution gradient above or under the hole. These solutions can be used for a wide range of rectangular web openings for any sections. Analyses were conducted using energy-based methods, and the results were compared with numerical data obtained from the commercial finite element software (ABAQUS). The numerical results demonstrate that the three of the six proposed formulas can be used to predict the critical buckling stress of cold-formed steel webs with rectangular holes with regard to the aspect ratio of the web opening.
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References
Chen B, Roy K, Uzzaman A et al (2019) Effects of edge-stiffened web openings on the behaviour of cold-formed steel channel sections under compression. Thin Walled Struct 144:106307
Gregory J, Thomas M, Duane S (2001) Cold-formed steel structures to the AISI specification. Marcel Dekker Inc, New York
Hancock G (1997) Design for distortional buckling of flexural members. Thin Walled Struct 27(1):3–12
Huang Y, Young B (2012) Material properties of cold-formed lean duplex stainless steel sections. Thin Walled Struct 54:72–81
Huang Y, Young B (2013) Experimental and numerical investigation of cold-formed lean duplex stainless steel flexural members. Thin Walled Struct 73:216–228
Huang Y, Young B (2014) The art of coupon tests. J Constr Steel Res 96:159–175
Keerthan P, Mahendran M (2012) New design rules for the shear strength of LiteSteel beams with web openings. J Struct Eng 139:640–656
Keerthan P, Mahendran M (2013) Experimental studies of the shear behaviour and strength of lipped channel beams with web openings. Thin Walled Struct 73:131–144
Keerthan P, Mahendran M (2014) Improved shear design rules for lipped channel beams with web openings. J Constr Steel Res 97:127–142
Keerthan P, Mahendran M (2015) Improving the shear capacities of lipped channel beams with web openings using plate stiffeners. J Struct Eng 141(11):04015022
Moen CD, Schafer B (2009) Elastic buckling of cold-formed steel columns and beams with holes. Eng Struct 31(12):2812–2824
Moen CD, Schafer BW (2008) Simplified methods for predicting elastic buckling of cold-formed steel structural members with holes. In: Proceedings of the 19th international specialty conference on cold-formed steel structures. Missouri University of Science and Technology, Rolla, MO
Moen CD, Schafer BW (2010) Extending direct strength design to cold-formed steel beams with holes. In: Twentieth international specialty conference on cold-formed steel structures (2010: November 3–4; St. Louis, Missouri). Missouri S&T (formerly the University of Missouri-Rolla)
Moen CD, Schudlich A, von der Heyden A (2013) Experiments on cold-formed steel c-section joists with unstiffened web holes. J Struct Eng 139(5):695–704
Pham CH (2017) Shear buckling of plates and thin-walled channel sections with holes. J Constr Steel Res 128:800–811
Pham DK, Pham CH, Pham SH et al (2020) Experimental investigation of high strength cold-formed channel sections in shear with rectangular and slotted web openings. J Constr Steel Res 165:105889
Pham SH, Pham CH, Hancock GJ (2017) Direct strength method of design for channel sections in shear with square and circular web holes. J Struct Eng 143(6):04017017
Rhodes J, Shanmugam NE (2002) Cold formed steel structures. In: Chen WF, Liew JYR (eds) The civil engineering handbook. CRC Press, Boca Raton
Roy K, Ting TCH, Lau HH et al (2019) Experimental and numerical investigations on the axial capacity of cold-formed steel built-up box sections. J Constr Steel Res 160:411–427
Sarawit AT (2003) Cold-formed steel frame and beam-column design. School of Civil and Environmental Engineering, Cornell University, Ithaca
Schafer B (2006) Direct strength method design guide. American Iron and Steel 656
Seo JK, Mahendran M (2012) Member moment capacities of mono-symmetric LiteSteel Beam floor joists with web openings. J Constr Steel Res 70:153–166
Seo JK, Mahendran M, Paik JK (2011) Numerical method for predicting the elastic lateral distortional buckling moment of a mono-symmetric beam with web openings. Thin Walled Struct 49(6):713–723
Singh TG, Singh KD (2018) Experimental investigation on performance of perforated cold–formed steel tubular stub columns. Thin Walled Struct 131:107–121
Smith FH, Moen CD (2014) Finite strip elastic buckling solutions for thin-walled metal columns with perforation patterns. Thin Walled Struct 79:187–201
Timoshenko SP, Gere JM (1961) Theory of elastic stability. McGraw-Hill, New York
Timoshenko SP, Woinowsky-Krieger S (1959) Theory of plates and shells. McGraw-Hill, New York
Ugural AC (2009) Stresses in beams, plates, and shells. CRC Press, Boca Raton
Uzzaman A, Lim JB, Nash D et al (2012a) Cold-formed steel sections with web openings subjected to web crippling under two-flange loading conditions—part I: tests and finite element analysis. Thin Walled Struct 56:38–48
Uzzaman A, Lim JB, Nash D et al (2012b) Cold-formed steel sections with web openings subjected to web crippling under two-flange loading conditions—part II: parametric study and proposed design equations. Thin Walled Struct 56:79–87
Wang L, Young B (2015) Beam tests of cold-formed steel built-up sections with web perforations. J Constr Steel Res 115:18–33
Yu N-t, Kim B, Yuan W-b et al (2019) An analytical solution of distortional buckling resistance of cold-formed steel channel-section beams with web openings. Thin Walled Struct 135:446–452
Yu WW, LaBoube RA (2010) Cold-formed steel design. Wiley, Hoboken
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Jameei Osgouei, A., Hosseinzadeh, Y. & Ahmadi, H. Local Buckling Analysis of Cold-Formed Steel Webs with Rectangular Openings. Iran J Sci Technol Trans Civ Eng 44 (Suppl 1), 67–78 (2020). https://doi.org/10.1007/s40996-020-00451-4
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DOI: https://doi.org/10.1007/s40996-020-00451-4