Email this article Analysis of frame buckling without sidesway classification
- Authors: Galishnikova V.V1, Pahl P.J.2
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Affiliations:
- Peoples’ Friendship University of Russia (RUDN University)
- Technische Universität Berlin
- Issue: Vol 14, No 4 (2018)
- Pages: 299-312
- Section: Frame buckling
- URL: https://ogarev-online.ru/1815-5235/article/view/346328
- DOI: https://doi.org/10.22363/1815-5235-2018-14-4-299-312
- ID: 346328
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Abstract
The effective buckling length of a column in a steel frame depends on the sidesway of the frame. The classification sidesway - no sidesway of a frame depends on all members of the frame and is made on an empirical basis. A change of class leads to large changes in the effective column length, and thus affects the buckling load and the economy of the column design. In order to avoid the uncertainties of the empirical classification, it is proposed to determine the buckling load of the complete frame with a nonlinear analysis. The method is illustrated with an unbraced and a braced frame, which are analyzed for hinged as well as fixed columns at ground floor level. The forces in the columns at buckling of the frames are compared to the buckling loads of the single columns. The design of high-rise steel frames against buckling by sidesway - no sidesway categorization has been compared to the buckling analysis of the frames as a whole with nonlinear models. The results confirm the large differences between the buckling loads of braced and unbraced high-rise frames, which are well known from analytical solutions for simple portal frames.
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About the authors
Vera V Galishnikova
Peoples’ Friendship University of Russia (RUDN University)
Author for correspondence.
Email: galishni@gmail.com
Dr Sci. (Eng.), Professor, Director of the Department of Civil Engineering, Engineering Academy, Peoples’ Friendship University of Russia (RUDN University). Research interests: computational civil engineering, building information modeling, topological computer models of buildings, computational geometry, computational mechanics of complex steel structural systems - latticed plates and shells, thin-walled plate and plate-rod structures, nonlinear finite element analysis of space frames, nonlinear stability of structures
6 Miklukho-Maklaya St., Moscow, 117198, Russian FederationPeter Jan Pahl
Technische Universität Berlin
Email: pahl@ifb.bv.tu-berlin.de
Prof. Dr. Dr. h. c. mult., Department of Civil Engineering, Technical University Berlin (TUB). Research interests: mathematical modeling and optimization of comple, structural systems, computational civil engineering, building information modeling, topological computer models of buildings, computational geometry, computational mechanics of complex steel structural systems - latticed plates and shells, thin-walled plate and platerod structures, nonlinear finite element analysis of space frames, nonlinear stability of structures
17 Juni Str., 135, 10623, Berlin, GermanyReferences
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