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Steel and Composite Structures Volume 25, Number 5, December10 2017 , pages 625-638 DOI: https://doi.org/10.12989/scs.2017.25.5.625 |
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Partial interaction analysis of multi-component members within the GBT |
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Alberto Ferrarotti, Gianluca Ranzi, Gerard Taig and Giuseppe Piccardo
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| Abstract | ||
| This paper presents a novel approach that describes the first-order (linear elastic) partial interaction analysis of members formed by multi-components based on the Generalised Beam Theory (GBT). The novelty relies on its ability to accurately model the partial interaction between the different components forming the cross-section in both longitudinal and transverse directions as well as to consider the cross-sectional deformability. The GBT deformations modes, that consist of the conventional, extensional and shear modes, are determined from the dynamic analyses of the cross-section represented by a planar frame. The partial interaction is specified at each connection interface between two adjacent elements by means of a shear deformable spring distributed along the length of the member. The ease of use of the model is outlined by an application performed on a multi-component member subjected to an eccentric load. The values calculated with an ABAQUS finite element model are used to validate the proposed method. The results of the numerical applications outline the influence of specifying different rigidities for the interface shear connection and in using different order of polynomials for the shape functions specified in the finite element cross-section analysis. | ||
| Key Words | ||
| generalised beam theory; partial interaction; steel-concrete members; thin-walled members | ||
| Address | ||
| Alberto Ferrarotti: School of Civil Engineering, The University of Sydney, Sydney NSW 2006, Australia; DICCA, Università degli Studi di Genova, Via Montallegro 1 – 16145 Genova, Italy Gianluca Ranzi: School of Civil Engineering, The University of Sydney, Sydney NSW 2006, Australia Gerard Taig: ARUP, Sydney NSW 2000, Australia Giuseppe Piccardo: DICCA, Università degli Studi di Genova, Via Montallegro 1 – 16145 Genova, Italy | ||