Finite Element Analysis of Bolted T-Stubs Undergoing Large Displacement: A Preliminary Study
Anna C. Faralli
P. J. Tan
|Médium:||article de revue|
|Publié dans:||The Open Construction and Building Technology Journal, décembre 2018, n. 1, v. 12|
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.
|Copyright:||© 2018 Anna C. Faralli, P.J. Tan, Massimo Latour, Gianvittorio Rizzano|
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