Abstract
This paper aims to study the experimental and analytical behaviour of cold-formed steel (CFS) T-joint members with or without external ring stiffeners under combined axial compression and bending. The parameters varied in the study include the type of T-joints (with and without ring stiffeners), spacing of the stiffeners (100 mm and 200 mm from the central axis of the T-Joint), and thickness of the ring stiffeners (4 mm and 6 mm). The load–deflection and load-strain behaviour were studied by measuring the overall deflection of the T-joints and strain using dial gauges and strain indicators, respectively. The load-carrying capacity of the T-joints with external ring stiffeners was compared, and the results of a numerical investigation showed good agreement. An extensive parametric study was carried out for different geometric parameters of the ring stiffener, chord, and brace member using the FE model to obtain the ultimate strength of the stiffened T-joints, and strength was also compared and obtained using the published equation. From the results of this investigation, it was found that the T-joints with external ring stiffeners can resist more strength and deformation when compared to the T-joints without external ring stiffeners.
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08 April 2024
A Correction to this paper has been published: https://doi.org/10.1007/s13296-024-00831-w
Abbreviations
- CFS:
-
Cold-Formed Steel
- CFHSS:
-
Cold-Formed High Strength Steel
- CHS:
-
Circular Hollow Section
- RHS:
-
Rectangular Hollow Section
- TJ:
-
T-Joint
- RS:
-
Ring Stiffener
- UTM:
-
Universal Testing Machine
- FEM:
-
Finite Element Method
- tr :
-
The thickness of ring stiffener
- ds :
-
Diameter of the ring stiffener
- S:
-
Spacing of the ring stiffener from the edge of the brace member
- d1 :
-
Diameter of the Brace
- t1 :
-
The thickness of the brace member
- l1 :
-
Length of the brace member
- do :
-
Diameter of the chord member
- to :
-
The thickness of the chord member
- Eo :
-
Young’s modulus of the joint member
- lo :
-
Length of the chord member
- Es :
-
Young’s modulus of the ring stiffener
- fy0 :
-
Yield stress of the joint member
- fys :
-
Yield stress of the ring stiffener
- β:
-
Diameter of the brace member to the diameter of the chord member
- μ:
-
Spacing between ring stiffeners to the diameter of the brace member
- λ:
-
Thickness of the ring stiffener to the thickness of the chord member
- γ:
-
Half the ratio of the diameter of the chord member and its thickness
- α:
-
Strength magnification factor
- P:
-
Strength of the unstiffened joint capacity
- Ps :
-
The axial capacity of the stiffened joint
- Pexp :
-
Experimental Strength of the T-joint
- δexp :
-
Experimental Maximum deflection of the T-joint
- δFEA :
-
Analytical Maximum deflection of the T-joint
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Conceptualization, Methodology, Visualization and review P. Sangeetha, Software & Validation, Harika Madireddy, Varshini B and Yokesh R B.
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Sangeetha, P., Madireddy, H., Varshini, B. et al. Effect of External Ring Stiffener on the Chord Members of Cold-Formed Steel T-Joints Under Combined Axial Compression and Bending. Int J Steel Struct 24, 296–309 (2024). https://doi.org/10.1007/s13296-024-00816-9
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DOI: https://doi.org/10.1007/s13296-024-00816-9