An Alternative Approach for the Design of Chevron-Braced Frames

The design of steel chevron-braced frames as per Eurocode 8 is based on the idea that only the braces should buckle and yield during ground motions, while other members should remain elastic. The elastic design of the braced frames is also allowed. However, in both cases, the seismic performance of...

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Autores principales:	Francesca Barbagallo, Melina Bosco, Marco Caragliano, Edoardo M. Marino, Pier Paolo Rossi
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	concentrically braced frames design seismic assessment Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/204439e0b64246f299873aaa98b7aaab
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spelling	oai:doaj.org-article:204439e0b64246f299873aaa98b7aaab2021-11-25T16:42:55ZAn Alternative Approach for the Design of Chevron-Braced Frames10.3390/app1122110142076-3417https://doaj.org/article/204439e0b64246f299873aaa98b7aaab2021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/11014https://doaj.org/toc/2076-3417The design of steel chevron-braced frames as per Eurocode 8 is based on the idea that only the braces should buckle and yield during ground motions, while other members should remain elastic. The elastic design of the braced frames is also allowed. However, in both cases, the seismic performance of the frame may be compromised because of premature yielding/buckling of columns. This paper proposes an alternative design procedure that promotes yielding of beams in addition to yielding of braces. This mitigates the vertical unbalanced force transmitted by compressive and tensile braces to the beam and in turn reduces the internal forces of the columns. The result is the overall improvement of the seismic performance owing to the reduction of the number of cases in which failure of the columns occurs before full exploitation of the ductility capacity of the dissipative members. The proposed design procedure is validated by incremental dynamic analyses performed on a set of chevron-braced frames. In particular, the peak ground accelerations of the frames designed by the proposed procedure at the attainment of Significant Damage and Collapse Prevention limit states are determined and compared to those of frames designed according to Eurocode 8. Furthermore, frames designed according to the Eurocodes and to the proposed method are compared in terms of structural cost.Francesca BarbagalloMelina BoscoMarco CaraglianoEdoardo M. MarinoPier Paolo RossiMDPI AGarticleconcentrically braced framesdesignseismic assessmentTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 11014, p 11014 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	concentrically braced frames design seismic assessment Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	concentrically braced frames design seismic assessment Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Francesca Barbagallo Melina Bosco Marco Caragliano Edoardo M. Marino Pier Paolo Rossi An Alternative Approach for the Design of Chevron-Braced Frames
description	The design of steel chevron-braced frames as per Eurocode 8 is based on the idea that only the braces should buckle and yield during ground motions, while other members should remain elastic. The elastic design of the braced frames is also allowed. However, in both cases, the seismic performance of the frame may be compromised because of premature yielding/buckling of columns. This paper proposes an alternative design procedure that promotes yielding of beams in addition to yielding of braces. This mitigates the vertical unbalanced force transmitted by compressive and tensile braces to the beam and in turn reduces the internal forces of the columns. The result is the overall improvement of the seismic performance owing to the reduction of the number of cases in which failure of the columns occurs before full exploitation of the ductility capacity of the dissipative members. The proposed design procedure is validated by incremental dynamic analyses performed on a set of chevron-braced frames. In particular, the peak ground accelerations of the frames designed by the proposed procedure at the attainment of Significant Damage and Collapse Prevention limit states are determined and compared to those of frames designed according to Eurocode 8. Furthermore, frames designed according to the Eurocodes and to the proposed method are compared in terms of structural cost.
format	article
author	Francesca Barbagallo Melina Bosco Marco Caragliano Edoardo M. Marino Pier Paolo Rossi
author_facet	Francesca Barbagallo Melina Bosco Marco Caragliano Edoardo M. Marino Pier Paolo Rossi
author_sort	Francesca Barbagallo
title	An Alternative Approach for the Design of Chevron-Braced Frames
title_short	An Alternative Approach for the Design of Chevron-Braced Frames
title_full	An Alternative Approach for the Design of Chevron-Braced Frames
title_fullStr	An Alternative Approach for the Design of Chevron-Braced Frames
title_full_unstemmed	An Alternative Approach for the Design of Chevron-Braced Frames
title_sort	alternative approach for the design of chevron-braced frames
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/204439e0b64246f299873aaa98b7aaab
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An Alternative Approach for the Design of Chevron-Braced Frames

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