Compressive behaviour and design of prestressed steel elements

Abstract The tensile performance of the chords of steel trusses can be considerably enhanced through the addition of prestressed cables. However, under compression, which may arise due to wind uplift, the prestressing may have a detrimental effect. The behaviour and design of prestressed steel elements in compression is examined presently. Eight experiments on prestressed elements were carried out, where the key variables examined were the initial prestress level, the presence of grout and the member slenderness. Cross-sectional behaviour and member buckling behaviour are examined analytically, numerically and experimentally, with good correlation achieved between the three approaches. The benefit of adding grout to bond the prestressing steel to the encasing tube is also investigated and design approaches for both non-grouted and grouted prestressed elements are proposed.

[1]  Leroy Gardner,et al.  Design of steel beams with discrete lateral restraints. , 2013 .

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

[3]  Beatrice Belletti,et al.  Behavior of Prestressed Steel Beams , 2010 .

[4]  Hsuan-Teh Hu,et al.  NONLINEAR ANALYSIS OF AXIALLY LOADED CONCRETE-FILLED TUBE COLUMNS WITH CONFINEMENT EFFECT , 2003 .

[5]  Luís Simões da Silva,et al.  Design of Steel Structures: Eurocode 3: Design of Steel Structures, Part 1-1: General Rules and Rules for Buildings , 2010 .

[6]  J. Mander,et al.  Theoretical stress strain model for confined concrete , 1988 .

[7]  Ehab Ellobody,et al.  Numerical modelling of fibre reinforced concrete-filled stainless steel tubular columns , 2013 .

[8]  Leroy Gardner.  Tubular Structures XIV , 2012 .

[9]  Leroy Gardner,et al.  Residual stresses in cold-rolled stainless steel hollow sections , 2008 .

[10]  M. Ahmer Wadee,et al.  Design of prestressed stayed columns , 2013 .

[11]  Leroy Gardner,et al.  Design and construction of long-span post-tensioned tubular steel structures , 2012 .

[12]  Leroy Gardner,et al.  Residual stress analysis of structural stainless steel sections , 2008 .

[13]  Dennis Lam,et al.  Behaviour of normal and high strength concrete-filled compact steel tube circular stub columns , 2006 .

[14]  Ana M. Ruiz-Teran,et al.  Dynamic behaviour of steel–concrete composite under-deck cable-stayed bridges under the action of moving loads , 2015 .

[15]  Gregory J. Hancock,et al.  A theoretical investigation of the column behaviour of cold-formed square hollow sections , 1993 .

[16]  Barbara Rossi,et al.  Strength enhancements in cold-formed structural sections - Part I: Material testing , 2013 .

[17]  L M Guptha.  PRESTRESSED STEEL STRUCTURES , 2002 .

[18]  Leroy Gardner,et al.  Tensile performance of prestressed steel elements , 2014 .

[19]  Daisuke Saito,et al.  Buckling behaviour of prestressed steel stayed columns with imperfections and stress limitation , 2009 .