Beam Shear Connections

Abstract:

Web side plate (WSP) connections consist of a WSP bolted to the web of a beam. The WSP and the beam web not lying in the same vertical plane cause a load eccentricity under shear or axial loading. However, common design practices in New Zealand do not explicitly consider the effects of this load eccentricity. Therefore, the purpose of this research paper was to investigate the effect this load eccentricity can have on the capacity of a WSP connection when it is subjected to shear loading alone. To do this, a finite element model was developed to predict the behaviour and performance of WSP connections under monotonic shear loading. Via the use of experimental data gathered from previous research into web side plate connections the performance of the model could be validated. It was shown that the finite element model could replicate the behaviour and performance of WSP connections well. Using the validated model procedure two different standard WSP connections were modelled and subjected to various parametric studies. It was found that for some typical NZ configurations the failure modes were identified to be bearing failure of the WSP or beam web and bolt tear out. The failure modes most susceptible to eccentric effects were considered to be bearing of the WSP and bolt shear failure. In general the effects of the eccentricity was considered to not be significant, however, there was one exception. The strength of the WSP connection was seen to decrease by 24% when the WSP was extended. It was concluded that the current design practices were appropriate for all WSP connections investigated except for those with extended WSPs. For extended WSP connections additional guidance was developed. Thus, considering the additional guidance in conjunction with current design practices will result in good behaviour for extended WSP connections.

• Periodical: Key Engineering Materials (Volume 763)
• Pages: 207-215
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.763.207
• Online since: February 2018
• Authors: Raharuhi Koia*, Jack Needham, Saeid Alizadeh, John Scarry, Gregory A. MacRae
• Keywords: ABAQUS, Bolted Web Side Plate, Eccentric Connection, Shear Connection, Universal Steel Beam

References

[1] Abolhassan A., S. M. Call, and K. M. McMullin (1990), Design of Single Plate Shear Connections.

[2] AISC, (1994). Manual of Steel Cnstruction, Load and Reistance Factor Design, Vol. I and Vol. II, Second Edition, AISC.

[3] Al Hijaj, M., and Mahamid, M. (2017). Behavior of skewed extended shear tab connections part I: Connection to supporting web.

DOI: 10.1016/j.jcsr.2016.08.024

[4] Bryan, G. H. (1891). On the Stability of a Plane Plate Under Thrusts in Its Own Plane, with Applications to the Buckling, of the Sides of a Ship, Proc. London Math. Soc., Vol. 22.

DOI: 10.1112/plms/s1-22.1.54

[5] Clarke, H and Weir, C. (2016). Web side plate connection under axial load.

[6] Dassault Systémes Simulia Corp. (2014). Abaqus CAE. (Version 6. 14-2),. (Software). Abaqus Inc.

[7] Suleiman M. F, Shahrooz B. M, Bill H. L, Fortney J. P, and Thornton A.W. (2017). 3-D finite element modeling of extended single plate shear connections: Predicting the mode of failure.

DOI: 10.1007/s13296-017-6012-x

[8] Rahman, A., Mahamid, M., Amro, A., and Ghorbanpoor, A. (2007). The analyses of extended shear tab steel connections - Part I: The unstiffened connections.

[9] Sherman, D., and Ghorbanpoor, A. (2002). Design of extended shear tabs., American Institute of Steel Design.

[10] Standards New Zealand, (1997). NZS3404: Part 1: 1997 Steel Structures Standard. New Zealand: Standards New Zealand.

[11] Steel Construction New Zealand, (2010). Steel connect: Structural steelwork connections guide. Steel Construction New Zealand.