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A simplified analysis method for composite beams with interlayer slip
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
2009 (English)In: International Journal of Mechanical Sciences, ISSN 0020-7403, E-ISSN 1879-2162, Vol. 51, no 7, 515-530 p.Article in journal (Refereed) PublishedText
Abstract [en]

A simplified static procedure is proposed for analysing and designing composite beams with interlayer slip. The method is parallel to the Eurocode 5 method, but it is general in nature and can be applied to arbitrary boundary and loading conditions. In contrast with Eurocode 5, a general and correct way of choosing the effective beam length of the problem is given by the present procedure, which is that the effective beam length equals the buckling length that is found in the corresponding column buckling problem. The procedure predicts the deflections and internal actions and stresses, in principle by replacing the fully composite bending stiffness (EI(infinity)) with the effective (partially) composite bending stiffness (EI(eff)) in the expressions for these quantities in the corresponding fully composite beam. This effective bending stiffness depends on two non-dimensional parameters: the composite action parameter (shear connection stiffness) and the relative bending stiffness parameter. The method is applied to a number of simple practical cases and the results obtained have been compared with the exact values. The applicability of the simplified analysis procedure was found to be very good, except for interlayer shear stresses. The error in the Eurocode 5 procedure, as compared with the method proposed in this paper, can in some cases be up to almost 30% depending on the boundary conditions.

Place, publisher, year, edition, pages
Pergamon Press, 2009. Vol. 51, no 7, 515-530 p.
Keyword [en]
Composite beams, Partial interaction, Interlayer slip, Approximate analysis, Simplified analysis, Effective bending stiffness
National Category
Mechanical Engineering
URN: urn:nbn:se:umu:diva-115988DOI: 10.1016/j.ijmecsci.2009.05.003ISI: 000269272100004OAI: diva2:907072
Available from: 2016-02-26 Created: 2016-02-08 Last updated: 2016-02-26Bibliographically approved

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Girhammar, Ulf Arne
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Department of Applied Physics and Electronics
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