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Composite beam-columns with interlayer slip: approximate analysis
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik.
2008 (Engelska)Ingår i: International Journal of Mechanical Sciences, ISSN 0020-7403, E-ISSN 1879-2162, Vol. 50, nr 12, s. 1636-1649Artikel i tidskrift (Refereegranskat) Published
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Abstract [en]

An approximate second order analysis procedure for composite beam-columns with interlayer slip subjected to transverse loading and axial compressive loads is developed. The magnification factors to be applied to the first order solutions in order to estimate the deflections and internal forces obtained by the second order analysis approach are presented. The method of applying magnification factors to internal axial forces is discussed. The approximate second order analysis procedure is developed for the four Euler cases with various transverse load conditions. The procedure is applied to and the accuracy is illustrated for simply supported partially beam-columns of steel and concrete, and timber and concrete with different bending stiffness and interlayer slip properties. The deflections and internal forces obtained by the approximate method compared extremely well, except for slip forces in case of very flexible shear connectors, with those obtained by the more rigorous second order analysis approach for different composite action (partial interaction) parameters (shear connector stiffness values). The study also shows that the magnification factor associated with the deflections can be utilized to estimate also the internal actions, except shear forces in case of very flexible shear connectors, in the second order case with minimal error for simply supported beam-columns. Thus. for members with shear connector stiffness of structural significance the proposed approximate method can be used in general for simply supported beam-columns. For other boundary and loading conditions, the approximate method needs to be re-evaluated. The approach of using one magnification factor greatly simplifies the analysis task for those components.

Ort, förlag, år, upplaga, sidor
Oxford: Pergamon Press, 2008. Vol. 50, nr 12, s. 1636-1649
Nyckelord [en]
Composite beam-columns, Partial interaction, Interlayer slip, Approximate analysis, Effective bending stiffness, Magnification factors
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URN: urn:nbn:se:umu:diva-117466DOI: 10.1016/j.ijmecsci.2008.09.003ISI: 000262204200010OAI: oai:DiVA.org:umu-117466DiVA, id: diva2:911798
Tillgänglig från: 2016-03-14 Skapad: 2016-03-01 Senast uppdaterad: 2018-06-07Bibliografiskt granskad

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Girhammar, Ulf Arne

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Totalt: 357 träffar
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