Ultimate strength of composite structure with different degrees of shear connection

  • Kim, Sang-Hyo (School of Civil and Environmental Engineering, Yonsei University) ;
  • Jung, Chi-Young (School of Civil and Environmental Engineering, Yonsei University) ;
  • Ahn, Jin-Hee (School of Civil and Environmental Engineering, Yonsei University)
  • Received : 2010.07.22
  • Accepted : 2011.06.22
  • Published : 2011.09.25


Composite beam, which combined the material characteristic of the steel and concrete, has been widely used in the construction of various building and bridge system. For the effective application of the composite beam, the composite action on the composite interface between the concrete element and the steel element should be achieved by shear connectors. The behavioral characteristics of composite beam are related with the degree of interaction and the degree of shear connection according to the shear strength and shear stiffness of the stud shear connectors. These two concepts are also affected by the number of installed shear connector and the strength of composite materials. In this study, experimental and analytical evaluations of the degree of shear connection affected by stud diameter were conducted, and the relationship between structural behavior and the degree of shear connection was verified. The very small difference among the ultimate loads of the specimens depending on the change of the degree of connection was possibly because of the dependence of the ultimate load on the characteristic of plastic moment of the composite beam.


degree of shear connection;composite beam;ultimate strength;head stud


Supported by : Korea Institute of Energy Technology Evaluation and Planning (KETEP)


  1. AASHTO (2004), "AASHTO LRFD Bridge Design Specification, SI units, 3rd edition", American Association of State Highway and Transportation Officials, Washington, D.C.
  2. Ahn J.H., Kim S.H. and Jeong Y.J. (2008), "Shear behaviors of perfobond rid shear connector under static and cyclic loadings", Magazine.Con. Res., 60(5), 347-357.
  3. Ahn J.H., Jung C.Y., Kim S.H. (2010), "Evaluation on structural behaviors of prestressed composite beams using external prestressing member", Struct. Eng. Mech., 34(2), 247-275
  4. Eurocode-4 ENV (2002), "Design of Composite Steel and Concrete Structures", Euro. Commi. Standard. (CEN).
  5. Lam D., M.ASCE, Ehab El-Lobody (2005), "Behavior of Headed Stud Shear Connectors in Composite Beam", J. Struct. Eng. 131(1), 96-107
  6. Liang Q.Q., Uy B., Bradford M.A., Ronagh H.R. (2004), "Ultimate strength of continuous composite beams in combined bending and shear", J. Constr. Steel. Res. (8)60, 1109-128.
  7. Oehlers D.J. and Johnson R. P. (1987), "The Strength of Stud Shear Connections in Composite Beams", The Struct. Engr., 65B(2), 44-48.
  8. Oehlers D.J., Nguyen N.T., Ahmed M. and Bradford M.A. (1997), "Partial Interaction in Composite Steel and Concrete Beams with Full Shear Connection," J. Construct. Steel Res., 41(2-3), 235-248.
  9. Oehlers D.J. and Bradford M.A. (1999), "Elementary Behavior of Composite Steel & Concrete Structural Members", Butterworth-Heinemannn, Oxford.
  10. Queiroz F.D., Vellasco, P.C.G.S. and Nethercot, D.A. (2006), "Finite element modeling of composite beams with full and partial shear connection", J, Constr. Steel. Res., 63(4), 505-521.
  11. Ranzi G. and Bradford M.A. (2007), "Composite beams with both longitudinal and transverse partial-interaction subjected to elevated temperatures", Eng. Struct., 29(10), 2737-2750.
  12. Ranzi G. and Bradford M.A. (2009), "Nonlinear analysis of composite beams with partial shear interaction by means of the direct stiffness method", Steel. Comp. Struc., 9(2), 131-158.
  13. Ryu H.K., Youn S.G., Bae D. and Chang S.P. (2005), "Estimation of Ultimate Strengths of Partial Shear Connection Composite Beams with Compact Section", Korea Society of Civil Engineers, 25(5A), 889-897.
  14. Shim C.S. (2004), "Experiments on Limit State Design of Large Stud Shear Connectors", KSCE J. Civil. Engi., 8(3), 313-318.
  15. Da Silva V.D., Barros M.H.F.M., Julio E.N.B.S. and Ferreira C.C. (2009), "Closed form ultimate strength of multi-rectangle reinforced concrete sections under axial load and biaxial bending", Comp. Concrete., 6(6): 505-521.

Cited by

  1. Behavior of composite girder with Y-type perfobond rib shear connectors vol.103, 2014,
  2. End-bearing resistance of Y-type perfobond rib according to rib width–height ratio vol.103, 2014,
  3. Experimental shear resistance evaluation of Y-type perfobond rib shear connector vol.82, 2013,
  4. Numerical and parametric studies on steel-elastic concrete composite structures vol.133, 2017,
  5. Experimental study on shear capacity of SRC joints with different arrangement and sizes of cross-shaped steel in column vol.21, pp.2, 2016,
  6. Experimental and numerical studies on the seismic behavior of steel reinforced concrete compression-bending members with new-type section steel vol.19, pp.2, 2016,
  7. Cyclic test for solid steel reinforced concrete frames with special-shaped columns vol.7, pp.3, 2014,
  8. Seismic behavior of steel reinforced concrete (SRC) joints with new-type section steel under cyclic loading vol.19, pp.6, 2015,
  9. Flexural stiffness of steel-concrete composite beam under positive moment vol.20, pp.6, 2016,
  10. Numerical analysis and horizontal bearing capacity of steel reinforced recycled concrete columns vol.22, pp.4, 2016,
  11. Experimental study on mechanical performances of lattice steel reinforced concrete inner frame with irregular section columns vol.16, pp.3, 2014,
  12. Behaviour of Corroded Single Stud Shear Connectors vol.10, pp.3, 2017,
  13. Experimental investigation of steel-concrete composite beams with different degrees of shear connection under monotonic and fatigue loads vol.21, pp.2, 2018,
  14. Study on flexural capacity of simply supported steel-concrete composite beam vol.21, pp.4, 2016,
  15. Experimental investigation and design of corroded stud shear connectors vol.19, pp.2, 2016,
  16. Experimental and numerical study on static behavior of elastic concrete-steel composite beams vol.123, 2016,
  17. Behaviour of steel-concrete composite beams using bolts as shear connectors vol.143, pp.1755-1315, 2018,