Optimal Design of Tensile Steel Members by Improving the Regulations of Codes Regarding the Correction of Shear Lag

Document Type : Original Article

Authors

1 Department of Civil Engineering, Nour branch, Islamic Azad University, Nour, Iran

2 Department of Civil Engineering, School of Engineering, Islamic Azad University Nour Branch, Nour, Iran

3 Department of Civil Engineering, Nour branch, Islamic Azad University, Nour, Iran.

4 Department of Math science, Islamic Azad University Nour, Branch, Nour, Iran

Abstract

The non-uniform stress distribution that occurs in a tension member adjacent to a connection, in which all elements of the cross section are not directly connected, is commonly referred to as the shear lag effect. This effect reduces the design strength of the member because the entire cross section is not fully effective at the critical section location. This phenomenon has long been taken into account in various structural codes, however the rules of the codes used are somewhat conservative and it seems that they need to be reviewed. In this research, a series of steel box section connected through two wings and plate sections were studied through finite element method using ABAQUS software, and the ultimate member capacity was obtained. It can be seen that in this regard the relationship between the rules is somewhat conservative and optimized relationships have been proposed to address this issue. Parameters used include connection length, axial force eccentricity, and weld size. The results show that the length of the connection, the gusset plate thickness and also the eccentricity have a significant influence on the shear latency coefficient.

Keywords

Main Subjects

References

[1] Munse W.H. & Chesson J.R., (1963). "Riveted and Bolted Joints: Net Section Design," ASCE Journal of Structural Engineering, 89.
[2] Marsh, (1969). "Single Angles in Tension and Compression," Journal of Structural Division,ASCE, 95.
[3] Gaylord E.H.Jr, Gaylord C.N., and Stallmeyer J.E., Design of Steel Structures, 3rd ed. New Tork: McGrow Hill, 1992.
[4] Easterling W.S. & Gonzales L., (1993). "Shear Lag Effects in Steel Tension Members," AISC Journal of Engineering, 30(2), pp. 77-89.
[5] Orbison J.G., Wagner M.E., & Fritz W.P., (Murch 1999). "Tension plane behavior in single-row bolted connections subject to block shear," Journal of Constructional Steel Research, 49(3), pp. 225-239.
[6] Humphries Matthew J.R. & Birkemoe Peter C., (June 2004). "Shear lag effects in fillet-welded tension connection of channels and similar shapes," Connections in Steel Structures, vol. 5.
[7] C. Fang, A.C.C. Lam,M.C.H. Yam, (2013). “Influence of shear lag on ultimate tensile capacity of angles and tees”, J. Constr. Steel Res. 84, 49–61.
[8] Orbison J.G., Wagner M.E., & Fritz W.P., (Murch 1999). "Tension plane behavior in single-row bolted connections subject to block shear," Journal of Constructional Steel Research, vol. 49, no. 3, pp. 225-239.
[9] K.K. Adewole, L.H. Teh, (2017). “Predicting steel tensile responses and fracture using thephenomenological ductile shear fracture model”, J. Mater. Civ. Eng. 29 (12), 06017019.
[10] S. Chen, X. Qian, A. Ahmed, (2016). “Cleavage fracture assessment for surface-cracked plates fabri-cated from high strength steels”, Eng. Fract. Mech. 161,  1–20.
[11] A.M.G. Coelho, F.S.K. Bijlaard, (2007). “Experimental behaviour of high strength steel endplate con-nections”, J. Constr. Steel Res., 63 (9), 1228–1240.
[12] P. Dusicka, G. Lewis, (2010).  “High strength steel bolted connections with filler plates”, J. Constr. Steel Res., 66 (1) ,75–84.
[13] X. Qian, Y. Li, O. Zhao, (2013).  “Ductile tearing assessment of high-strength steel X-joints under in-plane bending”, Eng. Fail. Anal. ,28 (2), 176–191.
[14] P. Može, D. Beg, (2010).  “High strength steel tension splices with one or two bolts”, J. Constr. Steel Res. , 66 (8) , 1000–1010
[15] J. Wang, S. Afshan, L. Gardner, (2017).  “Axial behaviour of prestressed high strength steel tubular members”, J. Constr. Steel Res., 133, 547–563.
[16] K. Ke, Y. Chen, (2016). “Seismic performance of MRFs with high strength steel main frames and EDBs”, J. Constr. Steel Res.,126, 214–228.
[17] K. Ke, M.C.H. Yam, (2018).  “A performance-based damage-control design procedure of hybrid steel MRFs with EDBs”, J. Constr. Steel Res.,143, 46–61
[18] AISC. (2005), Specifications for structural steel buildings, ANSI/-AISC360-05, Chicago.
[19] GUO H. (2005), “Shear lag effects on welded hot-rolled steel channels in tension”, A thesis submitted to the faculty of graduate studies and research in partial fulfillment of requierments for the degree of mastrer of science in the uinversity of Alberta.
[20] Yu H.L. and Jeong D.Y.  (2010) "Application of a stress triaxiality dependent fracture criterion in the finite element analysis of unnotched charpy specimens," Theoretical and Applied Fracture Mechanics, 54, 54-62.
[21] American Society for Testing Materials (ASTM) (2001), “A370 standard test methods and definitions for mechanical testing of steel product”.
[22] Abedin, Mohammad, Shervin Maleki, Nafiseh Kiani and Esmail Shahrokhinasab, (2019), "Shear Lag Effects in Channels Welded at Both Legs." Advances in Civil Engineering. 2019, Article ID 8041767, 10 pages, https://doi.org/10.1155/2019/8041767
[23] Barkhori, M., Maleki, S., Mirtaheri, M., Nazeryan, M. and Kolbadi, S.M.S. (2020), “Investigation of shear lag effect on tension members fillet-welded connections consisting of single and double channel sections”, Struct. Eng. Mech., 74(3), 445-455. http://doi.org/10.12989/sem.2020.74.3.445.
[24] Zhang, J., Han, B., Xie, H., Yan, W., Li, W. and Yu, J. (2021), “Analysis of shear lag effect in the negative moment region of steel-concrete composite beams under fatigue load”, Steel Compos. Struct., 39(4), 435. http://doi.org/10.12989/scs.2021.39.4.435.
[25] Maleki, S., & Ghaderi-Garekani, M. (2020). Block shear failure in welded gusset plates under combined loading. Journal of Constructional Steel Research, 170, 106079.
[26] Azhari M., Mirghaderi R. Design of Steel Structures. Based on the AISC Code, (2005), tenth Editing, Arkan-danesh Publications.
Send comment about this article
CAPTCHA Image

Files

Share

How to cite

Statistics