Stability of steel columns stiffened by stays and multiple crossarms

Abstract A pre-stressed stayed steel column (PSSC) can effectively enhance the buckling behaviour of compression columns. In the past, researchers have primarily concentrated on examining the behaviour of PSSCs with single-bay crossarms. However, research focused on PSSCs with multiple crossarms is limited. This article aims to investigate the stability behaviour of PSSCs stiffened with multiple crossarms according to geometric analysis in conjunction with finite element (FE) studies. The results show that the critical buckling modes can be complicated due to the introduction of multiple crossarms. Critical buckling deformation similar to three half sine waves can be observed. It has also been demonstrated that interactive buckling can be ignored when determining the actual buckling strength of PSSCs stiffened by multiple crossarms, though it must be considered for PSSCs with single-bay crossarms. The effects of stay diameter and pretension in the stay have been separately investigated, and the results show that the buckling strength of a steel column can be obviously enhanced even if the pretension in stays is quite small, because the stiffness of the stays can be automatically activated by column deformation.

[1]  Leroy Gardner,et al.  Stability of Multiple-crossarm Prestressed Stayed Columns With Additional Stay Systems , 2017 .

[2]  Philippe Samyn,et al.  Optimum design of stayed columns with split-up cross arm , 2005, Adv. Eng. Softw..

[3]  Daisuke Saito,et al.  Numerical studies of interactive buckling in prestressed steel stayed columns , 2009 .

[4]  M. Ahmer Wadee,et al.  Stability of prestressed stayed steel columns with a three branch crossarm system , 2016 .

[5]  Daisuke Saito,et al.  Post-buckling behaviour of prestressed steel stayed columns , 2008 .

[6]  Luís Simões da Silva,et al.  A full scale experimental study of prestressed stayed columns , 2015 .

[7]  Yong-Lin Pi,et al.  Effects of Geometric Imperfections on Flexural Buckling Resistance of Laterally Braced Columns , 2016 .

[8]  Ana M. Girão Coelho,et al.  Imperfection sensitivity of column instability revisited , 2013 .

[9]  J. G. S. da Silva,et al.  Experimental and numerical assessment of stayed steel columns , 2008 .

[10]  Kuang-Han Chu,et al.  Analysis and Design of Struts with Tension Ties , 1963 .

[11]  Murray C. Temple,et al.  Pretensioning of single-crossarm stayed columns. , 1979 .

[12]  João Martins,et al.  Structural behaviour of prestressed stayed columns with single and double cross-arms using normal and high strength steel , 2016 .

[13]  J. Dario Aristizabal-Ochoa.  Stability of imperfect columns with nonlinear connections under eccentric axial loads including shear effects , 2015 .

[14]  D. Saito,et al.  Optimal prestressing and configuration of stayed columns , 2010 .

[15]  Shu Ganping.  Experimental research on prestressed stayed columns with inner brace , 2006 .

[16]  Leroy Gardner,et al.  Experimental study of critical and post-buckling behaviour of prestressed stayed columns , 2012 .

[17]  M. Luo,et al.  Visualizing the RNA molecule in the bacterially expressed vesicular stomatitis virus nucleoprotein-RNA complex. , 2004, Structure.

[18]  Siu-Lai Chan,et al.  Stability analysis and parametric study of pre-stressed stayed columns , 2002 .