Steel and Composite Structures

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Effect of plate properties on shear strength of bolt group in single plate connection

  • Ashakul, Aphinat (Department of Civil Engineering, King Mongkut's University of Technology Thonburi) ;
  • Khampa, Kriangkrai (Department of Civil Engineering, King Mongkut's University of Technology Thonburi)
  • Received : 2013.02.12
  • Accepted : 2014.01.31
  • Published : 2014.06.25
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Abstract

A single plate shear connection, or shear tab, is a very popular shear connection due to its merit in ease of construction and material economy. However, problems in understanding the connection behavior, both in terms of strength and ductility, have been well-documented. Suggestions or design model for single plate connections in AISC Design Manual have been altered several times, with the latest edition settling down to giving designers pre-calculated design strength tables if the connection details agree with given configurations. Results from many full-scale tests and finite element models in the past suggest that shear strength of a bolt group in single plate shear connections might be affected by yield strength of plate material; therefore, this research was aimed to investigate and clarify effects of plate yield strength and thickness on shear strength of the bolt group in the connections, including the validity of using a plate thickness/bolt diameter ratio ($t_p/d_b$) in design, by using finite element models. More than 20 models have been created by using ABAQUS program with 19.0- and 22.2-mm A325N bolts and A36 and Gr.50 plates with various thicknesses. Results demonstrated that increase of plate thickness or plate yield strength, with the $t_p/d_b$ ratio remained intact, could significantly reduce shear strength of the bolt group in the connection as much as 15 percent. Results also confirmed that the $t_p/d_b$ ratio is a valid indicator to be used for guaranteeing strength sufficiency. Because the actual ratio recommended by AISC Design Manual is $t_p/d_b$ + 1.6 (mm) for connections with a number of bolts less than six and plate yield strength in construction is normally higher than the nominal value used in design, it is proposed that shear strength of a bolt group in single plate connections with a number of bolts equal or greater than seven be reduced by 15 percent and the $t_p/d_b$ ratio be limited to 0.500.

Keywords

References

  1. ABAQUS Manual (2007), ABAQUS/Standard User's Manual Volume I-III, Hibbitt, Karlsson & Sorenson, Inc., Pawtucket, RI, USA.
  2. American Institute of Steel Construction (AISC) (1999), Manual of Steel Construction, Load and Resistance Factor Design, Chicago, IL, USA.
  3. American Institute of Steel Construction (AISC) (2001), Manual of Steel Construction, Load and Resistance Factor Design, Chicago, IL, USA.
  4. American Institute of Steel Construction (AISC) (2002), Steel Design Guide 17 High Strength Bolts: A Primer for Structural Engineers, Chicago, IL, USA.
  5. American Institute of Steel Construction (AISC) (2005), Steel Construction Manual, Chicago, IL, USA.
  6. American Institute of Steel Construction (AISC) (2010), Steel Construction Manual, Chicago, IL, USA.
  7. ASTM (2008), Standard Specification for Carbon Structural Steel, American Society for Testings and Materials, PA, USA.
  8. Ashakul, A. (2004), "Finite element analysis of single plate shear connections", Ph.D. Dissertation, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA.
  9. Ashakul, A. and Murray, T.M. (2006a), "New method for designing single plate shear connections (Part I)", EASEC-10 Proceedings, Bangkok, Thailand, August.
  10. Ashakul, A. and Murray, T.M. (2006b), "New method for designing single plate shear connections (Part II)", EASEC-10 Proceedings, Bangkok, Thailand, August.
  11. Astaneh, A. (1989), "New concepts in design of single plate shear connections", Proceedings of the National Steel Construction Conference, AISC, Nashville, TN, USA, June.
  12. Astaneh, A. and Nader, M.N. (1989), "Design of tee framing shear connections", Eng. J., AISC, First Quarter, 26, 9-20.
  13. Astaneh, A. and Nader, M.N. (1990), "Experimental studies and design of steel tee shear connections", J. Struct. Eng., ASCE, 116(10), 2882-2901. https://doi.org/10.1061/(ASCE)0733-9445(1990)116:10(2882)
  14. Astaneh, A., McMullin, K.M. and Call, S.M. (1988), "Design of single-plate framing connections", Report No. UCB/SEMM-88/12, Department of Civil Engineering, University of California, Berkeley, CA, USA.
  15. Astaneh, A., Call, S.M. and McMullin, K.M. (1989), "Design of single plate shear connections", Eng. J., AISC, First Quarter, 26, 21-32.
  16. Astaneh, A., McMullin, K.M. and Call, S.M. (1993), "Behavior and design of steel single plate shear connections", J. Struct. Eng., ASCE, 119(8), 2421-2440. https://doi.org/10.1061/(ASCE)0733-9445(1993)119:8(2421)
  17. Crawford, F.C. and and Kulak, G.L. (1971), "Eccentrically Loaded bolted Connections", J. Struct. Div., ASCE, 97(3), 765-783.
  18. Creech, D. (2005), "Behavior of single plate shear connections with rigid and flexible supports", Master of Science Thesis, North Carolina State University, Raleigh, NC, USA.
  19. Crocker, J.P. and Chambers, J.J. (2004a), "Seismic design considerations for single plate shear connections", Structures Congress 2004, Nashville, Tennessee, USA, May.
  20. Crocker, J.P. and Chambers, J.J. (2004b), "Single plate shear connection response to rotation demands imposed by frames undergoing cyclic lateral displacements", J. Struct. Eng., ASCE, 130(6), 934-941. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:6(934)
  21. Garlock, M.E. and Selamet, S. (2010), "Modeling and behavior of steel plate connections subject to various fire scenarios", J. Struct. Eng., ASCE, 136(7), 897-906. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000179
  22. Geschwinder, L.F. and Gustafson, K.D. (2010), "Single-plate shear connection design to meet structural integrity requirements", Eng. J., Third Quarter, 47(3), 189-196.
  23. Hewitt, C.M. (2008), "Design of conventional- and extended-single-plate connections: AISC's new design procedures", Structures Congress 2008, Vancouver, Canada, April.
  24. Khampa, K. (2010), "Finite element analysis of effects of plate properties on shear strength of single plate connections", Master of Engineering Thesis, King Mongkut's University of Thonburi, Bangkok.
  25. Lipson, S.L. (1968), "Single-angle and single-plate beam framing connections", Proceedings of the Canadian Structural Engineering Conference, Toronto, Canada, February.
  26. Marosi, M., D'Aronco, M., Tremblay, R. and Rogers, C.A. (2011), "Multi-row bolted beam to column shear tab connections", Eurosteel 2011, Budapest, Hungary, August-September.
  27. Metzger, K.A.B. (2006), "Experimental verification of a new single plate shear connection design model", Master of Science in Civil Engineering Thesis, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA.
  28. Muir, L.S. and Hewitt, C.M. (2009), "Design of unstiffened extended single-plate shear connections", Eng. J., AISC, Second Quarter, 46(2), 67-79.
  29. Oosterhof, S.A. and Driver, R.G. (2012), "Performance of steel shear connections under combined moment, shear, and tension", Structures Congress 2012, Chicago, IL, USA, March.
  30. Rex, C.O. and Easterling, W.S. (2003), "Behavior and modeling of a bolt bearing on a single plate", J. Struct. Eng., ASCE, 129(6), 792-800. https://doi.org/10.1061/(ASCE)0733-9445(2003)129:6(792)
  31. Richard, R.M., Gillett, P.E., Kriegh, J.D. and Lewis, B.A. (1980), "The analysis and design of single plate framing connections", Eng. J., AISC, Second Quarter, 17, 38-52.
  32. Sarkar, D. (1992), "Design of single plate framing connections", Master of Science Thesis, University of Oklahoma, Norman, OK, USA.
  33. Selamet, S. and Garlock, M.E. (2009), "Modified connection details for single plate steel connections under fire", Structures Congress 2009, Austin, TX, USA, April-May.
  34. Weigand, J. and Berman, J. (2009), "Rotation and strength demands for simple connections to support large vertical deflections", Structures Congress 2009, Austin, TX, USA, April-May.
  35. Yim, H.C. and Krauthammer, T. (2012), "Mechanical properties of single-plate shear connections under monotonic, cyclic, and blast loads", Eng. Struct., 37, 24-35. https://doi.org/10.1016/j.engstruct.2011.12.041

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