Steel and Composite Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Investigation on the flexural behavior of an innovative U-shaped steel-concrete composite beam

  • Received : 2019.08.06
  • Accepted : 2019.11.04
  • Published : 2020.02.25
⟨ Previous Next ⟩

Abstract

Within the French CIFRE research project COMINO, an innovative type of composite beam was developed for buildings that need fire resistance with no additional supports in construction stage. The developed solution is composed of a steel U-shaped beam acting as a formwork in construction stage for a reinforced concrete part that provides the fire resistance. In the exploitation stage, the steel and the reinforced concrete are acting together as a composite beam. This paper presents the investigation made on the load bearing capacity of this new developed steel-concrete composite section. A full-scale test has been carried out at the Laboratory of Structural Engineering of the University of Luxembourg. The paper presents the configuration of the specimen, the fabrication process and the obtained test results. The beam behaved compositely and exhibited high ductility and bending resistance. The shear connection in the tension zone was effective. The beam failed by a separation between the slab and the beam at high deformations, excessive shear forces conducted to a failure of the stirrups in this zone. The test results are then compared with good agreement to analytical methods of design based on EN 1994 and design guidelines are given.

Keywords

Acknowledgement

This test took place in the framework of the "COMINO" PhD research project (CIFRE grant 2017/0048) in partnership with CTICM, University of Lorraine and University of Luxembourg. The steel sections were supplied by the company BRIAND. The steel fasteners were supplied by the company HILTI. Their supports are gratefully acknowledged as well as the work made by the team of the laboratory of structural engineering of the University of Luxembourg. However, the conclusions and recommendations presented in this article are independent and do not necessarily reflect the views of the sponsors.

References

  1. Ahn, H.J. and Ryu, S.H. (2007), "Experimental study on flexural strength of modular composite profile beams", Steel Compos. Struct., 7(1), 71-85. http://dx.doi.org/10.12989/scs.2007.7.1.071
  2. Ahn, H.J. and Ryu, S.H. (2008), "Experimental study on flexural strength of reinforced modular composite profiled beams", Steel Compos. Struct., 8(4), 313-328. http://dx.doi.org/10.12989/scs.2008.8.4.313
  3. Braun, M., Obiala, R. and Odenbreit, C. (2015), "Analyses of the loadbearing behavior of deep-embedded concrete dowels, CoSFB", Steel Construction, 8(3), 167-173. https://doi.org/10.1002/stco.201510024
  4. Chen, L.H., Li, S.T., Zhang, H.Y. and Wu, X.F. (2018), "Experimental study on mechanical performance of checkered steel-encased concrete composite beam", J. Constr. Steel Res., 143, 223-232. https://doi.org/10.1016/j.jcsr.2017.12.021
  5. EN 10025-2 (2005), Hot rolled products of structural steels - Part 2: Technical delivery conditions for non-alloy structural steels, European Committee for Standardisation (CEN); Brussels, Belgium.
  6. EN 12390-3 (2012), Testing hardened concrete. Part 3: Compressive strength of test specimens, European Committee for Standardisation (CEN); Brussels, Belgium.
  7. EN 1990 (2003), Eurocode 0: Basis of structural design, European Committee for Standardisation (CEN); Brussels, Belgium.
  8. EN 1992-1-1 (2005), Eurocode 2: Design of concrete structures. Part 1.1: General rules and rules for buildings, European Committee for Standardisation (CEN); Brussels, Belgium.
  9. EN 1994-1-1 (2005), Eurocode 4: Design of composite steel and concrete structures. Part 1.1: General rules and rules for buildings, European Committee for Standardisation (CEN); Brussels, Belgium.
  10. EN ISO 6892-1 (2016), Metallic materials - Tensile testing. Part 1: Method of test at room temperature, International Organization for Standardization (ISO); Geneva, Switzerland.
  11. Goble, G.G. (1968), "Shear strength of thin flange composite specimens", Engineering Journal, American Institute of Steel Construction, 5, 62-65.
  12. Jaspart, J.P. (1997), "Recent advances in the field of steel joints - Column bases and further configurations for beam-to-column joints and beam splices", Professorship Thesis, University of Liege, Belgium.
  13. Keo, P., Lepourry, C., Somja, H. and Palas, F. (2018), "Behavior of a new shear connector for U-shaped steel-concrete hybrid beams", J. Constr. Steel Res., 145, 153-166. https://doi.org/10.1016/j.jcsr.2018.01.028
  14. Kim, S.H. and Aboutaha, R.S. (2004), "Ductility of carbon fiber-reinforced polymer (CFRP) strengthened reinforced concrete beam: Experimental investigation", Steel Compos. Struct., 4(5), 333-353. http://dx.doi.org/10.12989/scs.2004.4.5.333
  15. Kozma, A., Odenbreit, C., Braun, M.V., Veljkovic, M. and Nijgh, M.P. (2019), "Push-out tests on demountable shear connectors of steel-concrete composite structures", Structures, https://doi.org/10.1016/j.istruc.2019.05.011
  16. Lawson, R.M. and Taufiq, H. (2019), "Partial shear connection in light steel composite beams", J. Constr. Steel Res., 154, 55-66. https://doi.org/10.1016/j.jcsr.2018.11.005
  17. Liu, J., Zhao, Y., Chen, Y.F., Xu, S. and Yang, Y. (2018), "Flexural behavior of rebar truss stiffened cold-formed U-shaped steel-concrete composite beams", J. Constr. Steel Res., 150, 175-185. https://doi.org/10.1016/j.jcsr.2018.08.011
  18. Liu, Y., Guo, L., Qu, B. and Zhang, S. (2017), "Experimental investigation on the flexural behavior of steel-concrete composite beams with U-shaped steel girders and angle connectors", Eng. Struct., 131, 492-502. https://doi.org/10.1016/j.engstruct.2016.10.037
  19. Oehlers, D.J. (1993), "Composite profiled beams", J. Struct. Eng., 119(4), 1085-1100. https://doi.org/10.1061/(ASCE)0733-9445(1993)119:4(1085)
  20. Oehlers, D.J. and Bradford, M.A. (1995), Composite Steel and Concrete Structural Members, Pergamon, Oxford, United Kingdom.
  21. Peng, M. and Shi, Z. (2004), "Interface characteristics of RC beams strengthened with FRP plate", Struct. Eng. Mech., 18(3), 315-330. http://dx.doi.org/10.12989/sem.2004.18.3.315
  22. Ryu, S-H. (2010), "Study on behavior of T-section modular composite profiled beams", Steel Compos. Struct., 10(5), 457-473. http://dx.doi.org/10.12989/scs.2010.10.5.457
  23. Turetta, M., Odenbreit, C., Khelil, A. and Martin, P.O. (2019), "Investigations on the lateral-torsional buckling of an innovative U-shaped steel beam", J. Constr. Steel Res., (Under Review)
  24. Uy, B. and Bradford, M.A. (1995a), "Ductility of profiled composite beams. Part I: experimental study", J. Struct. Eng., 121(5), 876-882. https://doi.org/10.1061/(ASCE)0733-9445(1995)121:5(876)
  25. Uy, B. and Bradford, M.A. (1995b), "Ductility of profiled composite beams. Part II: analytical study", J. Struct. Eng., 121(5), 883-889. https://doi.org/10.1061/(ASCE)0733-9445(1995)121:5(883)
  26. Zhou, X., Zhao, Y., Liu, J., Chen, Y.F. and Yang, Y. (2019), "Bending experiment on a novel configuration of cold-formed U-shaped steel-concrete composite beams", Eng. Struct., 180, 124-133. https://doi.org/10.1016/j.engstruct.2018.11.001