Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Numerical Study of the Shear Lag Effects in Steel Angles
Submission Author:
Ruan Richelly Santos , MG
Co-Authors:
Ruan Richelly Santos, José Osvaldo Ferreira Filho, Ana Lydia Castro e Silva, hermes carvalho, Rodrigo Caldas
Presenter: Ruan Richelly Santos
doi://10.26678/ABCM.COBEM2019.COB2019-1444
Abstract
The use of steel angles is common and advantageous, mainly in structures subjected to tensile stresses. However, it is necessary to accurately define their ultimate tensile capacity to avoid structural oversizing, and guarantee safety to constructions. In connected angles with bolts, due to the nonuniform tension distribution, there is a phenomenon known as shear lag. Therefore, it is necessary to consider its impacts for the calculation of tensile resistance and, consequently, to the design. It is accomplished by the determination of a reduction factor by standardizations, as ABNT NBR 8800:2008, ANSI/AISC 360-16 and EN 1993-1-1:2005. Besides them, there are other procedures, such as another analytical formulae, and numerical simulation. As this last one is now widely spread and considered an accurate solution in the technical field, it was aimed to numerically study the shear lag effects on the behavior of steel angles bolted at one leg. Thus, finite element models were developed and validated against existing experimental data. Furthermore, numerical results were compared to the analytical ones obtained by the codes’ procedures. Then, they were used to perform a parametric study in order to check the connection length effects. At the end, it was obtained a consistent set of numerical models which can be used as base for future studies.
Keywords
Steel angles, Shear lag, Tension members, Numerical analysis, Finite Elements
