Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Buckling Strength of Tie-Struts and Application to Frame Girders
Tie–struts are members subject partly to axial compression and partly to axial tension within the two end supports and appear in the chords of lattice girders of rigid frames. There are three types of tie-strut with different patterns of force distribution. The bearing capacity of these members has to be determined by stability calculation. Although the current Chinese code of cold-formed thin-wall steel structures GB50018 provides a formula for calculating tie-strut chords, it can only be used for the stability check of one of the three types. In this study, analytical equations of elastic critical load are firstly derived, based on those of struts subject to compression varying by step and then parametric analyses were carried out and practical formulas for member effective length are obtained through curve fitting for each of the three types. The recommended formulas have good accuracy and can be used in design work. The second part of this study covers the application of tie-strut buckling calculation to solid-web frame girders. Similar to strut analogy in beam buckling, a tie-strut analogy is developed for frame plate girders and this approach is especially useful for examining buckling induced by lower flange compression when the upper flange is restrained against lateral translation.
Buckling Strength of Tie-Struts and Application to Frame Girders
Tie–struts are members subject partly to axial compression and partly to axial tension within the two end supports and appear in the chords of lattice girders of rigid frames. There are three types of tie-strut with different patterns of force distribution. The bearing capacity of these members has to be determined by stability calculation. Although the current Chinese code of cold-formed thin-wall steel structures GB50018 provides a formula for calculating tie-strut chords, it can only be used for the stability check of one of the three types. In this study, analytical equations of elastic critical load are firstly derived, based on those of struts subject to compression varying by step and then parametric analyses were carried out and practical formulas for member effective length are obtained through curve fitting for each of the three types. The recommended formulas have good accuracy and can be used in design work. The second part of this study covers the application of tie-strut buckling calculation to solid-web frame girders. Similar to strut analogy in beam buckling, a tie-strut analogy is developed for frame plate girders and this approach is especially useful for examining buckling induced by lower flange compression when the upper flange is restrained against lateral translation.
Buckling Strength of Tie-Struts and Application to Frame Girders
Chen, Shaofan (Autor:in)
Advances in Structural Engineering ; 13 ; 525-535
01.08.2010
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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