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Title

An analytical model for the prediction of the resistance of T-stubs with four bolts in a row

Authors

Abstract

In case of bolted connections, the main components that contribute to the deformability of the joint are: the column flange in bending, the end-plate in bending and the angles in tension which are modelled as an equivalent T-stub in tension. In technical literature, several experimental and theoretical works deal with the characterization of the behavior of T-stubs fastened by means of two bolts [4,7,8] but, the case of T-stubs with more than two bolts per row is not considered, even though it is a sub-assemblage that is applied in many practical situations [6]. In this paper, in order to provide a contribution to improve the model given in EC3, extending it to cases not currently covered in the code, attention is focused on the experimental and theoretical analysis of T-stubs with four bolts per row, following three steps: experimental investigation, finite element modelling and proposal of a mechanical model for the prediction of the T-stub plastic resistance.

References

[1] CEN, 2005a. Eurocode 3: Design of steel structures - Part 1-8: Design of joints. European Committee for Standardization, CEN, Brussels.
[2] CEN, 2005b. Eurocode 3: Design of steel structures - Part 1-1: General rules and rules for buildings. European Committee for Standardization, CEN, Brussels.
[3] Demonceau, J., Jaspart, J., Muller, C. & Weinand, K., 2010. Application of Eurocode 3 to Steel Connections with Four Bolts per Horizontal Row. In SDSS', ed. Colloquium on Stability and Ductility of Steel Structures. Rio de Janeiro, 2010.
[4] Faella, C., Piluso, V. & Rizzano, G., 2000. Structural Steel Semi-Rigid Connections. Boca Raton: CRC Press.
[5] Trezza S., 2013. Previsione del Comportamento Ultimo di T-stub con 4 bulloni per fila: Analisi teorico- sperimentale. Master Thesis, University of Salerno, Tutors: Santiago A., Simões da Silva, Latour M., Rizzano G.
[6] Weynand, K.; Oerder, R., 2013. “Typisierte Anschlüsse im Stahlhochbau”, 3rd edition, Stahlbau Verlags- und Service GmbH, Düsseldorf.
[7] Yee, Y.L. & Melchers, R.E., 1986. Moment-Rotation Curves for Bolted Connections. Journal of Structural Engineering ASCE, 112, pp.615-35.
[8] Zoetemeijer, P., 1974. A Design Method for the Tension Side of Statically Loaded, Bolted beam-to- column Connections. Heron, 20, pp.1-59.

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