Vol. 1, No. 7, 2006

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ISSN: 1559-3959
Incremental modeling of T-stub connections

Minas E. Lemonis and Charis J. Gantes

Vol. 1 (2006), No. 7, 1135–1159
Abstract

An incremental model for predicting the mechanical characteristics of T-stub steel connections is presented in this paper. The response is calculated analytically on the basis of a simple beam representation for the flange and a deformational spring for the bolt. Contact phenomena in the flange are taken into account, and by means of an incremental procedure it becomes possible to follow the development of these phenomena throughout the loading history. Material nonlinearity is also accounted for, both in the flange and the bolt, assuming a bilinear constitutive model. We propose several refinements of the model, which enhance its effectiveness with respect to intricate characteristics of T-stub behavior, such as bolt-flange interaction and three-dimensional geometry. The performance of the model is validated by comparison to experimental results found in the literature and by a parametric study performed in parallel with three-dimensional finite element analyses.

Keywords
T-stub connection, T-stub model, steel connections, contact phenomena, nonlinearity
Milestones
Received: 29 December 2005
Revised: 5 May 2006
Accepted: 19 June 2006
Published: 1 November 2006
Authors
Minas E. Lemonis
National Technical University of Athens
Laboratory of Steel Structures
9 Iroon Polytechniou
157 80, Zografou
Greece
Charis J. Gantes
National Technical University of Athens
Laboratory of Steel Structures
9 Iroon Polytechniou
157 80, Zografou
Greece