Fire Technology

, Volume 53, Issue 3, pp 1039–1058 | Cite as

Behavior of Steel–Concrete Partially Composite Beams Subjected to Fire—Part 1: Experimental Study

  • Wei-yong Wang
  • Michael D. Engelhardt
  • Guo-qiang Li
  • Guo-sheng Huang


Partially composite steel–concrete beams are commonly used in building construction, and so the behavior of such beams in fire is an important problem. This paper presents the results of an experimental investigation on the response of two composite beam specimens subject to fire exposure. The two specimens were nominally identical, except for the shear connection ratio. Based on room temperature calculations, one specimen was designed as fully composite, and the second was designed as partially composite with a 50% shear connection ratio. The concrete slab for each specimen was constructed with a flat steel deck and reinforcement was provided by a reinforcing bar truss. Both specimens were subject to a constant vertical load applied at four locations along the span and tested in a furnace with an ISO-834 standard fire. Both specimens achieved large deflections associated with flexural yielding of the composite beams and exhibited measured flexural capacities larger than predicted from Eurocode 4. Based on test measurements, the shear connection ratio had a significant influence on interface slip and uplift behavior of concrete slabs. Failure of the specimens was defined when the maximum deflection reached span/30. The fire exposure time needed to reach this definition of failure was nearly the same for both specimens, and was 51 min for the fully composite beam and 49 min for the partially composite beam. A companion paper considers the degradation of material properties with temperature and slips behavior of shear connectors at elevated temperatures and also provides an analytical approach to predict fire response of steel–concrete partially composite beams.


Fire response Composite beam Partially composite Shear connection ratio 



The experiments were carried out in the State Key Laboratory for Disaster Reduction in Civil Engineering. This material is based upon the work supported by the Open Research fund of State Key Laboratory for Disaster Reduction in Civil Engineering (Grant number: SLDRCE-MB-05). The assistance of the staff in Ferguson Structural Engineering Laboratory in the University of Texas at Austin, and support of China Scholarship Council are also greatly acknowledged.


  1. 1.
    Kwon G, Engelhardt MD, Klingner RE (2011) Experimental behavior of bridge beams retrofitted with postinstalled shear connectors. J Bridge Eng. 16(4):536–545CrossRefGoogle Scholar
  2. 2.
    Mirza O, Uy B (2009) Behavior of headed stud shear connectors for composite steel–concrete beams at elevated temperatures. J Constr Steel Res. 65(3):662–674CrossRefGoogle Scholar
  3. 3.
    Oven VA (1996) The behavior of composite beams with partial interaction at elevated temperatures. Ph.D. thesis, The University of SheffieldGoogle Scholar
  4. 4.
    Huang Z, Burgess IW, Plank RJ (1999) The influence of shear connectors on the behavior of composite steel-framed buildings in fire. J Constr Steel Res. 51(3):219–237CrossRefGoogle Scholar
  5. 5.
    Bailey CG (1995) Simulation of the structural behavior of steel-framed buildings in fire. Ph.D. thesis, The University of SheffieldGoogle Scholar
  6. 6.
    Aaron J, Wang M (2012) Numerical investigation into headed shear connectors under fire. J Struct Eng. 138(1):118–122CrossRefGoogle Scholar
  7. 7.
    Chen LZ, Jiang SC, Li GQ, Wang WY (2013) Experimental studies on the behavior of headed stud shear connectors at elevated temperatures. J Tongji Univ (Nat Sci Ed). 41(8):1151–1157Google Scholar
  8. 8.
    Zhao B, Kruppa J (1996) Experimental and numerical investigation of fire behavior of steel and concrete composite beams. In: Proceedings of the engineering foundation conference 1997, ASCE, New York, pp 129–142Google Scholar
  9. 9.
    Selden KL, Varma AH (2016) Flexural capacity of composite beams subjected to fire: fiber-based models and benchmarking. Fire Technol. doi: 10.1007/s10694-016-0565-7 Google Scholar
  10. 10.
    Zhou HY, Li GQ (2005) Behavior of steel-composite beams subjected to fire. In: Proceedings of the fourth international conference on advances in steel structures, Shanghai, pp 1005–1010, June 2005Google Scholar
  11. 11.
    Bihina G, Zhao B, Bouchaïr A (2013) Behavior of composite steel–concrete cellular beams in fire. Eng Struct. 56(11):2217–2228CrossRefGoogle Scholar
  12. 12.
    EN1994-1-2 (2005) Eurocode 4: design of composite steel and concrete structures—Part 1-2: General rules—structural fire design. European Committee for Standardization, BrusselsGoogle Scholar
  13. 13.
    Standardization Administration of the People’s Republic of China (2007) Steel of reinforcement for concrete—Part 2: Hot rolled ribbed bars. GB1499.2-2007, China Standard Press, BeijingGoogle Scholar
  14. 14.
    Standardization Administration of the People’s Republic of China (2006) Carbon structural steel. GB/T 700-2006, China Standard Press, BeijingGoogle Scholar
  15. 15.
    GB 3301-2006 (2006) The welded steel H section, a industry standard of metallurgy of ferrous metals of the People’s Republic of China. BeijingGoogle Scholar
  16. 16.
    Benedetti A, Mangoni E (2007) Analytical prediction of composite beams response in fire situations. J Constr Steel Res. 63:221–228CrossRefGoogle Scholar
  17. 17.
    ENV 1993-1-2 (2001) Eurocode 3, design of steel structures. Part 1.2: Fire resistance. European Committee for Standardization (CEN), Sept 2001.Google Scholar

Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Wei-yong Wang
    • 1
    • 2
  • Michael D. Engelhardt
    • 3
  • Guo-qiang Li
    • 2
  • Guo-sheng Huang
    • 1
  1. 1.College of Civil EngineeringChongqing UniversityChongqingChina
  2. 2.State Key Laboratory for Disaster Reduction in Civil EngineeringTongji UniversityShanghaiChina
  3. 3.Department of Civil, Architectural and Environmental EngineeringUniversity of Texas at AustinAustinUSA

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