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Keywords: composite construction, Perfobond and T-Perfobond shear connectors, finite element analysis, non-linear analysis, structural behaviour, composite beams.

Summary

This paper deals with the numerical simulation of composite girders and compares the finite element results to the results from push-out tests performed at the Civil Engineering Department of the University of Coimbra on different types of connectors: the Perfobond, and an innovative connector: the T-Perfobond, formed by a half IPN 340 section with holes in the web.

An extensive parametric numerical study was conducted and is reported in this paper to investigate the structural performance of these connectors varying parameters like the shear connector spacing and the adopted shear connector (stud, Perfobond or T-Perfobond).

The non-linear numerical modelling was conducted with the aid of the finite element method performed using the ANSYS program and was centred on the use of Perfobond, T-Perfobond and stud shear connectors. A three-dimensional finite element model of composite beams was adopted.

The finite elements adopted in the model were elastic-plastic shell (SHELL43) and solid (SOLID65) elements for the steel section and the concrete slab, respectively. Nonlinear springs (COMBIN39) were used to represent the shear connectors. Both longitudinal and transverse reinforcing bars were considered smeared throughout the solid finite elements.

Concentrated loads were incrementally applied to the model by means of a displacement control. For the convergence criterion, the L2- norm (square root sum of the squares) of displacements was considered.

Two limits were established to define the ultimate load for each finite element investigation: a lower and an upper bound, corresponding to concrete compressive strains of 0.2%, and 0.35%, respectively. These two limits define an interval in which the composite beam collapse load is located.

The present model is validated by comparisons against analytical results found in literature. The numerical tests performed by Queiroz et al. [1] successfully illustrate the behaviour of the composite system which is being investigated. The beams spanned 5490 mm with an I-shaped steel member 305 mm deep (12" x 6" x 44 lb/ft BSB) and a concrete slab 120 thick x 1220 mm wide.

The finite element model has proved to be effective in terms of predicting the load-deflection response for beams subjected to concentrated or uniformly distributed loads, longitudinal slip at the steel-concrete interface, shear force carried by the connector and the mode of failure (connector failure or concrete crushing). It is also capable of investigating beams with either full or partial shear interaction.

References

1: F.D. Queiroz, P.C.G.S. Vellasco, D.A. Nethercot, "Finite element modelling of composite beams with full and partial shear connection", Journal of Constructional Steel Research, 64(4), 505-521, 2007. doi:10.1016/j.jcsr.2006.06.003

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 91 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: B.H.V. Topping, L.F. Costa Neves and R.C. Barros Paper 4 A Parametric Analysis of Composite Beams with T-Perfobond Shear Connectors J.C. da C. Vianna¹, L.F. Costa Neves², P.C.G. da S. Vellasco³ and S.A.L. de Andrade¹ ¹Civil Engineering Department, Pontifical Catholic University of Rio de Janeiro, PUC-Rio, Brazil ²Civil Engineering Department, University of Coimbra, Portugal ³Structural Engineering Department, State University of Rio de Janeiro, UERJ, Brazil doi:10.4203/ccp.91.4 purchase the full-text of this paper Full Bibliographic Reference for this paper J.C. da C. Vianna, L.F. Costa Neves, P.C.G. da S. Vellasco, S.A.L. de Andrade, "A Parametric Analysis of Composite Beams with T-Perfobond Shear Connectors", in B.H.V. Topping, L.F. Costa Neves, R.C. Barros, (Editors), "Proceedings of the Twelfth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 4, 2009. doi:10.4203/ccp.91.4 Keywords: composite construction, Perfobond and T-Perfobond shear connectors, finite element analysis, non-linear analysis, structural behaviour, composite beams. Summary This paper deals with the numerical simulation of composite girders and compares the finite element results to the results from push-out tests performed at the Civil Engineering Department of the University of Coimbra on different types of connectors: the Perfobond, and an innovative connector: the T-Perfobond, formed by a half IPN 340 section with holes in the web. An extensive parametric numerical study was conducted and is reported in this paper to investigate the structural performance of these connectors varying parameters like the shear connector spacing and the adopted shear connector (stud, Perfobond or T-Perfobond). The non-linear numerical modelling was conducted with the aid of the finite element method performed using the ANSYS program and was centred on the use of Perfobond, T-Perfobond and stud shear connectors. A three-dimensional finite element model of composite beams was adopted. The finite elements adopted in the model were elastic-plastic shell (SHELL43) and solid (SOLID65) elements for the steel section and the concrete slab, respectively. Nonlinear springs (COMBIN39) were used to represent the shear connectors. Both longitudinal and transverse reinforcing bars were considered smeared throughout the solid finite elements. Concentrated loads were incrementally applied to the model by means of a displacement control. For the convergence criterion, the L2- norm (square root sum of the squares) of displacements was considered. Two limits were established to define the ultimate load for each finite element investigation: a lower and an upper bound, corresponding to concrete compressive strains of 0.2%, and 0.35%, respectively. These two limits define an interval in which the composite beam collapse load is located. The present model is validated by comparisons against analytical results found in literature. The numerical tests performed by Queiroz et al. [1] successfully illustrate the behaviour of the composite system which is being investigated. The beams spanned 5490 mm with an I-shaped steel member 305 mm deep (12" x 6" x 44 lb/ft BSB) and a concrete slab 120 thick x 1220 mm wide. The finite element model has proved to be effective in terms of predicting the load-deflection response for beams subjected to concentrated or uniformly distributed loads, longitudinal slip at the steel-concrete interface, shear force carried by the connector and the mode of failure (connector failure or concrete crushing). It is also capable of investigating beams with either full or partial shear interaction. References 1 F.D. Queiroz, P.C.G.S. Vellasco, D.A. Nethercot, "Finite element modelling of composite beams with full and partial shear connection", Journal of Constructional Steel Research, 64(4), 505-521, 2007. doi:10.1016/j.jcsr.2006.06.003 purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £140 +P&P)
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