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Evaluation on Effectiveness of Cold-Formed Steel Column with Various Types of Edge Stiffener

  • Research Article - Civil Engineering
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Abstract

In this study, four series of cold formed steel channel columns with different types of edge stiffeners is analyzed under pinned end conditions subjected to axial compression. The selected cross-sectional profiles are met with the interactive failure modes. The cross-sectional dimensions are satisfied the pre-qualified section properties of cold-formed steel structures. Test results are simulated with finite element analysis software using ANSYS, and good agreement has been achieved. After the validation of the proposed numerical model, the effect of variation of thickness, yield stress and overall slenderness in the strength and behaviour of the section are carried out. Interaction of distortional and flexural buckling is the governing failure modes of the column section. All the findings of FEA are compared with the Direct Strength Specification for cold-formed steel structures, and the strength of the member is also determined by using the modified equations from the literature. Based on the results, a new design equation is proposed, and also it is validated by the results available from the literature.

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Abbreviations

A :

Cross-sectional area

\({P}_{\mathrm{cre}}\) :

Critical elastic column buckling load in flexural buckling/flexural–torsional/torsional

\({P}_{\mathrm{crl}}\) :

Critical elastic local column buckling

\({P}_{\mathrm{crd}}\) :

Critical elastic distortional column buckling load

d :

Depth of the channel section

\({P}_{\mathrm{d,\,DSM}}\) :

Design strength calculated from the direct strength method

\({P}_{\mathrm{EXP}}\) :

Experimental ultimate load

\({r}_{\mathrm{min}}\) :

Least radius of gyration

\({P}_{\mathrm{n,\, DSM}}\) :

Nominal strength calculated from the direct strength method

\({P}_{\mathrm{n,\,ANB}}\) :

Nominal strength calculated from the design rules in Anbarasu et al. [23]

\({P}_{\mathrm{nl}}\) :

Nominal strength for local buckling

\({P}_{\mathrm{nd}}\) :

Nominal strength for distortional buckling

\({P}_{\mathrm{ne}}\) :

Nominal strength for flexural–torsional buckling

\({P}_{\mathrm{n,\,Pro}}\) :

Proposed design rules for the direct strength method

d1:

Size of the edge stiffener

d2:

Size of the return lip

t :

Thickness of the channel section

\({P}_{\mathrm{ANSYS}}\) :

Ultimate load calculated from the FE analysis

\({f}_{\mathrm{y}}\) :

Yield stress of the material

E :

Young’s modulus

\({f}_{\mathrm{U}}\) :

Ultimate stress of the material

\(\lambda \) :

Overall slenderness ratio of the column

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Authors and Affiliations

  1. Centre for Structural Engineering research, Department of Civil Engineering, Sona College of Technology, Salem, Tamil Nadu, India

    P. Manikandan & G. Aruna

  2. Kongu Engineering College, Erode Dt, Tamil Nadu, India

    S. Balaji

  3. Department of Civil Engineering, Paavai Group of Institution, Namakkal Dt, Tamil Nadu, India

    S. Sukumar

  4. Vishwa Infrastructures and Services Pvt. Ltd., Ahmadabad, India

    M. Sivakumar

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  1. P. Manikandan
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  2. G. Aruna
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  3. S. Balaji
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  4. S. Sukumar
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  5. M. Sivakumar
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Correspondence to P. Manikandan.

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Manikandan, P., Aruna, G., Balaji, S. et al. Evaluation on Effectiveness of Cold-Formed Steel Column with Various Types of Edge Stiffener. Arab J Sci Eng 42, 4157–4168 (2017). https://doi.org/10.1007/s13369-017-2571-6

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  • DOI: https://doi.org/10.1007/s13369-017-2571-6

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