Finite Element Analysis of Bolted T-Stubs Undergoing Large Displacement: A Preliminary Study
Anna C. Faralli1, *, P.J. Tan1, Massimo Latour2, Gianvittorio Rizzano2
Identifiers and Pagination:Year: 2018
Issue: Suppl-1, M10
First Page: 170
Last Page: 176
Publisher ID: TOBCTJ-12-170
Article History:Received Date: 1/10/2017
Revision Received Date: 1/11/2017
Acceptance Date: 1/12/2017
Electronic publication date: 23/05/2018
Collection year: 2018
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
In recent years, there have been increased interests by the steel structures community to characterise the large-deformation response of T-stubs to evaluate the deformation capacity of bolted joints. However, little information exists on the influence of second-order effects on the response of bolted T-stubs and, consequently, there are no existing guidelines on how to include these effects in de-sign.
In this paper, we assess the influence of second-order effects in T-stubs bolted to a rigid support through a parametric investigation, using finite element analysis.
Both material and geometrical non-linearities were considered since they are known to have a critical impact upon the performance of T-stubs. A benchmark model is first generated and validated and then used to carry out a parametric investigation. A method to assess the contributions of membrane forces to the overall deformation response of a T-stub is also proposed based on the introduction of a non-dimensional parameter Ψ.
The combination of geometric parameters that are most affected by second order effects, induced by large displacement, was identified. A direct correspondence was found between the extent of second order effects that has developed and the index Ψ: a higher index implies a greater influence by second order effects.