Simplified finite element analysis of bolted T-stub connection components

• Published in: Engineering structures Vol. 100; pp. 656 - 664
• Main Authors: Francavilla, Antonella B., Latour, Massimo, Piluso, Vincenzo, Rizzano, Gianvittorio
• Format: Journal Article Web Resource
• Language: English
• Published: Elsevier Ltd 01-10-2015; Elsevier Science
• Subjects: Civil engineering; Connections; Ductility; Engineering, computing & technology; FEM model; Ingénierie civile; Ingénierie, informatique & technologie; T-stubs; Connections; FEM model; T-stubs; Ductility
• ISSN: 0141-0296; 1873-7323; 1873-7323
• DOI: 10.1016/j.engstruct.2015.06.029

•A FEM model for predicting the whole behaviour of T-stubs is presented.•The procedures adopted to model geometry, materials and interactions between elements are presented.•The accuracy of the FEM model is verified with the results of 12 tests on T-stubs.•A comparison with the model proposed by EC3 is carried out.
In order to predict the T-stub behaviour, simplified theoretical models are provided by Eurocode 3 that allow to evaluate the T-stub stiffness and strength. Conversely, there are no codified rules to predict the plastic deformation capacity. Therefore, the prediction of the T-stub ductility is still an open issue in the connection modelling. Even though theoretical models are very important in order to recognise the parameters that govern the stiffness, resistance and ductility of bolted T-stubs, they cannot always be applied with confidence, because of the simplifying assumptions usually made for gaining closed form solutions. Therefore, the information coming from simplified theoretical models needs to be integrated with that obtained either by experimental results or by means of finite element simulations.
For this reason, in this paper, a simple simplified FEM model of a bolted T-stub with only one bolt row has been developed using SAP2000 computer program aiming to show how even a widespread commercial software can be used to estimate the plastic deformation capacity of bolted joints’ components.
The accuracy of the FEM model has been verified by means of a comparison with available experimental results. In particular, all the specimens that were tested at the Material and Structure Laboratory of Salerno University in 2001 have been modelled and the results obtained are presented and discussed.