Influence of Bracings on the Stability of Columns
Publication: Practice Periodical on Structural Design and Construction
Volume 15, Issue 3
Abstract
This article analyzes the stability of columns composed of deformable bars, with the particular goal of studying the influence of bracings. The bars are assumed to be deformable by bending, axial forces, shearing forces, and torsion. A computer program has been developed to determine the critical loading of the structure by taking into account geometric nonlinearity. The stiffness matrix technique is used to describe the structural response in three dimensions. Global instability is considered to have been achieved when a given loading introduces singularities in the global stiffness matrix. When the critical loading has been determined, it is possible to determine global instability parameters such as effective buckling coefficients. An example is presented and compared to ANSYS results to demonstrate the potential of the process.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The writers are grateful for the support from UNICAMP and from Vallourec and Mannesmann Tubes (V&M do Brasil).
References
AISC. (2005). “Specification for structural steel buildings.” ANSI/AISC 360-05, Chicago.
ANSYS user’s manual; ANSYS revision V-5.2 SAS IP (ANSYS). (1995) Editors’ ADVISORY, Urbana, Ill.
Ballio, G., and Mazzolani, F. M. (1983). Theory and design of steel structures, Chapman & Hall, London.
Callejas, I. J. A., Vieira, R. F., and Requena, J. A. V. (1998). “Elastic second-order instability analysis for plane rigid frames: Comparative analysis of the finite element method and stability functions method.” Proc., 4th World Congress on Computational Mechanics, CIMNE, Buenos Aires, Argentina.
Fisher, J. M. (2006). “Bracing of beams, trusses, and joist girders using open web steel joists.” AISC Engineering J., First Quarter, 25–29.
Galambos, T., and Xykis, C. (1991). “The effect of lateral bracing on the of steel trusses.” J. Constr. Steel Res., 20, 251–258.
Golub, G. H., and Loan, C. F. V. (1987). Matrix computations, 5th Ed., The Johns Hopkins University Press, Baltimore.
Maheri, M. R., and Graffarzadeh, H. (2008). “Connection overstrength in steel-braced RC frames.” Eng. Struct., 30, 1938–1948.
Mottram, J. T., and Aberle, M. (2002). “When should shear-flexible stability functions be used in elastic structural analysis?” Proc., Institution of Civil Engineers Structures & Buildings, Thomas Telford Publishing Ltd., London, 152.
Requena, J. A. V. (1995). “Carregamento crítico de instabilidade geral de pilares de seção composta variável, de edifícios industriais metálicos.” Ph.D. thesis, Faculdade de Engenharia Civil, Escola de Engenharia de São Carlos, Brazil, 157.
Requena, J. A. V. (1997). “Determinação do comprimento efetivo de flambagem de pilares de edifícios industriais com variação brusca de seção transversal.” Proc., XXVIII Jornadas Sul-Americanas de Engenharia Estrutural, ASAEE, São Carlos, SP, Brazil.
Santos, R. M. (2002). “Analise de estruturas metálicas reticuladas planas considerando a não-linearidade fisica em sistemas não-conservativos.” Mestrado em Estruturas dissertação, Departamento de Estruturas, Universidade Estadual de Campinas, Campinas, Brazil, 117.
Thürlimann, B. (1990). “Column buckling—Historical and actual notes.” J. Constr. Steel Res., 17, 95–111.
Vieira, R. F., Callejas, I. J. A., and Requena, J. A. V. (1998). “Instabilidade de estruturas reticuladas tridimensionais utilizando funções de rigidez.” Proc., III SIMMEC—Simpósio Mineiro de Mecânica Computacional, REM—Revista Escola de Minas, Ouro Preto, MG, Brazil.
Information & Authors
Information
Published In
Practice Periodical on Structural Design and Construction
Volume 15 • Issue 3 • August 2010
Pages: 236 - 240
Copyright
© 2010 ASCE.
History
Received: Feb 10, 2009
Accepted: Oct 20, 2009
Published online: Jul 15, 2010
Published in print: Aug 2010
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.