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Cyclic Energy Dissipation of Cold-Formed Steel Studs Experiencing Euler Buckling
This paper summarizes results from an experimental program designed to evaluate the tension-compression cyclic axial response of cold-formed steel C-section structural studs. Establishing the hysteretic response will allow energy dissipation from cross-sectional deformations unique to cold-formed steel members to be included in seismic models, resulting in more accurate predictions of seismic performance. A new cyclic loading protocol for cold-formed steel members is presented that establishes the target axial displacement based on elastic buckling parameters like the Euler buckling load. The protocol is used to explore the cyclic response of unbraced structural studs experiencing global buckling deformation, and weak axis flexural buckling in compression is observed. The buckling causes local folding of the stiffening lips which become stress concentration points during the tension cycles. Post-bucking energy dissipation was observed as well as tension stretching and softening. The studs failed with a tensile fracture initiating at the damaged stiffening lips near the stud midheight or at the welded end supports.
Cyclic Energy Dissipation of Cold-Formed Steel Studs Experiencing Euler Buckling
This paper summarizes results from an experimental program designed to evaluate the tension-compression cyclic axial response of cold-formed steel C-section structural studs. Establishing the hysteretic response will allow energy dissipation from cross-sectional deformations unique to cold-formed steel members to be included in seismic models, resulting in more accurate predictions of seismic performance. A new cyclic loading protocol for cold-formed steel members is presented that establishes the target axial displacement based on elastic buckling parameters like the Euler buckling load. The protocol is used to explore the cyclic response of unbraced structural studs experiencing global buckling deformation, and weak axis flexural buckling in compression is observed. The buckling causes local folding of the stiffening lips which become stress concentration points during the tension cycles. Post-bucking energy dissipation was observed as well as tension stretching and softening. The studs failed with a tensile fracture initiating at the damaged stiffening lips near the stud midheight or at the welded end supports.
Cyclic Energy Dissipation of Cold-Formed Steel Studs Experiencing Euler Buckling
Padilla-Llano, D. (author) / Eatherton, M. (author) / Moen, C. D. (author) / Bruce, T. (author) / MacAnallen, L. (author)
Structures Congress 2012 ; 2012 ; Chicago, Illinois, United States
Structures Congress 2012 ; 1518-1528
2012-03-29
Conference paper
Electronic Resource
English
Cyclic Energy Dissipation of Cold-Formed Steel Studs Experiencing Euler Buckling
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