Abstract
The use of cold-formed steel (CFS) sections as the primary load-carrying members in residential and industrial buildings is rising. Different forms of cross sections are adopted for flexural members. This article presents a detailed study on the flexural performance of CFS built-up flexural members with corrugated web. The influence of different parameters, such as the aspect ratio and angle of corrugation, towards evaluating the appropriateness of the current design methods in the design of cold-formed steel built-up I-beam with the trapezoidal corrugated web was assessed. Twenty-eight simply supported beam specimens under monotonically applied four-point bending were studied. A nonlinear finite element analysis (FEA) was also conducted by using ANSYS software, and the numerical models were validated against the test results. The FEA results were in close agreement with that of the experiment. Further, the experimental as well as the numerical flexural strengths of specimens were compared with the design strengths predicted by using North American Specifications (AISI S100-2007) and Australian/New Zealand standards (AS/NZ: 4600-2005) for cold-formed steel structures. The current design specifications were assessed by conducting a reliability analysis. The comparison of the results shows that the corrugation angle and aspect ratio have a significant influence on the flexural capacity of beams.
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Abbreviations
- a :
-
Plane length of flat panel
- b :
-
Projection length of the inclined
- b f :
-
Breadth of the flange
- b l :
-
Length of the lip
- c :
-
Length of the inclined panel
- d :
-
Depth of corrugation
- d max :
-
Maximum depth of corrugation
- E :
-
Young’s modulus
- f oy :
-
Elastic buckling stress for flexural buckling about the y-axis and
- f oz :
-
Elastic buckling stress for torsional buckling
- f y :
-
Yield stress
- f u :
-
Ultimate stress
- h w :
-
Height of the web
- L :
-
Length of the specimen
- M Exp :
-
Experimental moment capacity
- M FEA :
-
Moment capacity predicted by FEA
- M AISI :
-
Moment capacity predicted by North American Specifications (AISI S100-2007) and
- M AS/NZ :
-
Moment capacity predicted by Australian/New Zealand standards (AS/NZ: 4600-2005)
- t f :
-
Thickness of the flange
- t l :
-
Thickness of the line
- t w :
-
Thickness of the corrugated web
- β :
-
Aspect ratio
- υ :
-
Poisson’s ratio
- θ :
-
Corrugation angle
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Dar, A.R., Anbarasu, M. & Arun Kumar, G. Cold-Formed Steel Built-Up I-Beam with the Trapezoidal Corrugated Web: Tests and Numerical Simulation. J. Inst. Eng. India Ser. A 102, 943–958 (2021). https://doi.org/10.1007/s40030-021-00571-8
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DOI: https://doi.org/10.1007/s40030-021-00571-8