Publicación
Artículo científico (article).
A stiffness reduction method for the in-plane design of stainless steel members and frames according with EN 1993-1-4
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UPCommons. Portal del coneixement obert de la UPC
- González de León, Isabel|||0000-0003-2667-9931
- Arrayago Luquin, Itsaso|||0000-0002-0054-9322
- Real Saladrigas, Esther|||0000-0003-1723-3380
- Mirambell Arrizabalaga, Enrique|||0000-0003-2612-9104
Current design standards for stainless steel such as ASCE 8-02 and EN 1993-1-4 prescribe provisions for the design of cross-sections and members that account for material nonlinearities and strain hardening, although these features are not considered in the global design of structures. Recent studies have highlighted the need of accounting for material nonlinearities in order to design efficient and safe stainless steel structures, and it is expected that the forthcoming versions of the standards will incorporate updated rules for the global design of these structures. To contribute to this field, this paper presents a Stiffness Reduction Method (SRM) for the in-plane design of stainless steel members and frames with stocky sections based on the prescriptions given in the next version of EN 1993-1-4. The proposed approach predicts the ultimate capacity and internal forces in stainless steel structures by performing a second-order elastic analysis in which the stiffnesses of the members are reduced by a set of factors defined in this paper to account for the effect of the spread of plasticity, residual stresses and member imperfections. The accuracy of the presented method is assessed for individual stainless steel structural members (columns, beams, and beam-columns) with different cross-sections and material properties, and for austenitic stainless steel portal frames, against numerical results obtained from nonlinear analyses conducted on finite element models. A comparison between the proposed approach and the Direct Analysis Method prescribed in the upcoming AISC 370 Specification is also provided, showing that the results are comparable in the two approaches., The research presented in this paper was developed in the frame of the Project BIA2016-75678-R, AEI/FEDER, UE “Comportamiento estructural de pórticos de acero inoxidable. Seguridad frente a acciones accidentales de sismo y fuego”, funded from the MINECO (Spain). The financial support received from the Spanish Ministry for Science, Innovation and Universities through the FPI-MINECO PhD fellowship Ref. BES-2017-082958 (I. González-de-León) and from the European Commission through the Marie Sklodowska-Curie grant agreement No. 842395 (I. Arrayago) is also gratefully acknowledged., Peer Reviewed
DOI: http://hdl.handle.net/2117/359774, https://dx.doi.org/10.1016/j.engstruct.2021.113740
UPCommons. Portal del coneixement obert de la UPC
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HANDLE: http://hdl.handle.net/2117/359774, https://dx.doi.org/10.1016/j.engstruct.2021.113740
UPCommons. Portal del coneixement obert de la UPC
oai:upcommons.upc.edu:2117/359774
Ver en: http://hdl.handle.net/2117/359774, https://dx.doi.org/10.1016/j.engstruct.2021.113740
UPCommons. Portal del coneixement obert de la UPC
oai:upcommons.upc.edu:2117/359774
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