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Structural Engineering and Mechanics
  Volume 74, Number 3, May10 2020 , pages 445-455

Investigation of shear lag effect on tension members fillet-welded connections consisting of single and double channel sections
Moien Barkhori, Shervin Maleki, Masoud Mirtaheri, Meissam Nazeryan and S.Mahdi S.Kolbadi

    Shear lag phenomenon has long been taken into consideration in various structural codes; however, the AISC provisions have not proposed any specific equation to calculate the shear lag ratio in some cases such as fillet-welded connections of front-to-front double channel sections. Moreover, those equations and formulas proposed by structural codes are based on the studies that were conducted on riveted and bolted connections, and can be applied to single channel sections whilst using them for fillet-welded double channels would be extremely conservative due to the symmetrical shape and the fact that bending moments will not develop in the gusset plate, resulting in less stress concentration. Numerical models are used in the present study to focus on parametric investigation of the shear lag effect on fillet-welded tension connection of double channel section to a gusset plate. The connection length, the eccentricity of axial load, the free length and the thickness of gusset plate are considered as the key factors in this study. The results are then compared to the estimates driven from the AISC-LRFD provisions and alternative equations are proposed.
Key Words
    shear lag; tension members; net section fracture; double channel section
Moien Barkhori: Department of Civil Engineering, University of Jiroft, Jiroft, Iran
Shervin Maleki, Meissam Nazeryan: Department of Civil Engineering, Sharif University of Technology, Tehran, Iran
Masoud Mirtaheri and S.Mahdi S.Kolbadi: Department of Civil Engineering, K.N. Toosi University of Technology, Tehran, Iran

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