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A platform for research: civil engineering, architecture and urbanism
Three-segment steel brace for seismic design of concentrically braced frames
https://orcid.org/0000-0002-8201-5569
AbstractA three-segment steel brace has been developed and investigated by means of numerical and experimental studies. The objective of the development was to develop a brace member that exhibits stable and symmetrical cyclic response under cyclic loading. The concept was conceived by extending a conventional elastic buckling of a column with variable sections to include post-buckling deformation. The concept was first examined using FEM-based simulations, and tested experimentally with an ensemble of small-scale brace specimens under cyclic loads. Seismic response of CBFs with conventional buckling braces and the three-segment braces were compared and results are discussed in terms of drift, brace and beam ductility demands. The results indicate that the tested three-segment braces specimens were capable of exhibiting stable and symmetrical hysteretic response, as well as dissipating a greater amount of energy compared to conventional buckling braces. Further, the dynamic analyses results point out that substituting the conventional buckling braces with the three-segment braces substantially mitigates the seismic demand on the braced frames.
HighlightsPost-buckling behavior substantially reduces the overall energy dissipation capacity of CBF.Three-segment brace shows stable hysteresis, dissipating more energy than conventional buckling brace does.Substituting three-segment braces for the conventional buckling braces mitigates the seismic demand on the braced frames.
Three-segment steel brace for seismic design of concentrically braced frames
https://orcid.org/0000-0002-8201-5569
AbstractA three-segment steel brace has been developed and investigated by means of numerical and experimental studies. The objective of the development was to develop a brace member that exhibits stable and symmetrical cyclic response under cyclic loading. The concept was conceived by extending a conventional elastic buckling of a column with variable sections to include post-buckling deformation. The concept was first examined using FEM-based simulations, and tested experimentally with an ensemble of small-scale brace specimens under cyclic loads. Seismic response of CBFs with conventional buckling braces and the three-segment braces were compared and results are discussed in terms of drift, brace and beam ductility demands. The results indicate that the tested three-segment braces specimens were capable of exhibiting stable and symmetrical hysteretic response, as well as dissipating a greater amount of energy compared to conventional buckling braces. Further, the dynamic analyses results point out that substituting the conventional buckling braces with the three-segment braces substantially mitigates the seismic demand on the braced frames.
HighlightsPost-buckling behavior substantially reduces the overall energy dissipation capacity of CBF.Three-segment brace shows stable hysteresis, dissipating more energy than conventional buckling brace does.Substituting three-segment braces for the conventional buckling braces mitigates the seismic demand on the braced frames.
Three-segment steel brace for seismic design of concentrically braced frames
https://orcid.org/0000-0002-8201-5569
AbstractA three-segment steel brace has been developed and investigated by means of numerical and experimental studies. The objective of the development was to develop a brace member that exhibits stable and symmetrical cyclic response under cyclic loading. The concept was conceived by extending a conventional elastic buckling of a column with variable sections to include post-buckling deformation. The concept was first examined using FEM-based simulations, and tested experimentally with an ensemble of small-scale brace specimens under cyclic loads. Seismic response of CBFs with conventional buckling braces and the three-segment braces were compared and results are discussed in terms of drift, brace and beam ductility demands. The results indicate that the tested three-segment braces specimens were capable of exhibiting stable and symmetrical hysteretic response, as well as dissipating a greater amount of energy compared to conventional buckling braces. Further, the dynamic analyses results point out that substituting the conventional buckling braces with the three-segment braces substantially mitigates the seismic demand on the braced frames.
HighlightsPost-buckling behavior substantially reduces the overall energy dissipation capacity of CBF.Three-segment brace shows stable hysteresis, dissipating more energy than conventional buckling brace does.Substituting three-segment braces for the conventional buckling braces mitigates the seismic demand on the braced frames.
Three-segment steel brace for seismic design of concentrically braced frames
Seker, Onur (author) / Akbas, Bulent (author) / Seker, Pinar Toru (author) / Faytarouni, Mahmoud (author) / Shen, Jay (author) / Mahamid, Mustafa (author)
Journal of Constructional Steel Research ; 137 ; 211-227
2017-06-26
17 pages
Article (Journal)
Electronic Resource
English
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