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An innovative system to increase the longitudinal shear capacity of composite slabs

  • Simoes, Rui (ISISE - Institute for Sustainability and Innovation in Structural Engineering: Department of Civil Engineering, University of Coimbra) ;
  • Pereira, Miguel (ISISE - Institute for Sustainability and Innovation in Structural Engineering: Department of Civil Engineering, University of Coimbra)
  • 투고 : 2019.05.16
  • 심사 : 2020.04.30
  • 발행 : 2020.05.25

초록

Steel-concrete composite slabs with profiled steel sheeting are widely used in the execution of floors in steel and composite buildings. The rapid construction process, the elimination of conventional replaceable shuttering and the reduction of temporary support are, in general, considered the main advantages of this structural system. In slabs with the spans currently used, the longitudinal shear resistance commonly provided by the embossments along the steel sheet tends to be the governing design mode. This paper presents an innovative reinforcing system that increases the longitudinal shear capacity of composite slabs. The system is constituted by a set of transversal reinforcing bars crossing longitudinal stiffeners executed along the upper flanges of the steel sheet profiles. This type of reinforcement takes advantage of the high bending resistance of the composite slabs and increases the slab's ductility. Two experimental programmes were carried out: a small-scale test programme - to study the resistance provided by the reinforcing system in detail - and a full-scale test programme to test simply supported and continuous composite slabs - to assess the efficacy of the proposed reinforcing system on the global behaviour of the slabs. Based on the results of the small-scale tests, an equation to predict the resistance provided by the proposed reinforcing system was established. The present study concludes that the resistance and the ductility of composite slabs using the reinforcing system proposed here are significantly increased.

키워드

과제정보

The authors would like to thank the team from the Laboratory of Structures of the Department of Civil Engineering of the University of Coimbra. Thanks and recognition are also given to the Portuguese steelwork company O Feliz Metalomecânica SA, the partner in the research project, for the production of the profiled steel sheeting. This work was financed by FEDER funds through the Competitivity Factors Operational Programme - COMPETE 2020 /Portugal 2020/UE within the scope of the research project POCI-01-0247-FEDER-003483.

참고문헌

  1. Abas, F.M., Gilbert, R.I., Foster, S.J. and Bradford, M.A. (2013), "Strength and serviceability of continuous composite slabs with deep trapezoidal steel decking and steel fibre reinforced concrete", Eng. Struct., 49, 866-875. https://doi.org/10.1016/j.engstruct.2012.12.043.
  2. Altoubat, S., Ousmane, H. and Barakat, S. (2015), "Effect of fibers and welded-wire reinforcements on the diaphragm behavior of composite deck slabs", Steel Compos. Struct., 19(1), 153-171. https://doi.org/10.12989/scs.2015.19.1.153.
  3. Carmona, R.L., Branco, J.C. and Simoes, R. (2009), "Lajes mistas com chapa colaborante: Solucoes para melhorar o seu comportamento", In VII Congresso de Construcao Metalica e Mista (pp. II-593-II-604). Lisbon, Portugal: CMM - Associacao portuguesa de Construcao Metalica e Mista.
  4. CEN. (2002), EN 1990: Eurocode - Basis of structural design. Bruxelas: European Commitee for Standardization.
  5. CEN. (2004a), EN 1992-1-1. Eurocode 2: Design of concrete structures - Part 1-1-: General rules and rules for buildings. Brussels: European Commitee for Standardization.
  6. CEN. (2004b), EN 1994-1-1: Eurocode 4: Design of Composite Steel and Concrete Structures - Part 1-1: General Rules and Rules for Buildings. Brussels: European Commitee for Standardization.
  7. CEN. (2006), EN 1993-1-3: Eurocode 3 - Design of steel structures; Part 1-3: General rules - Supplementary rules for cold-formed members and sheeting Eurocode. Brussels: European Commitee for Standardization.
  8. Chen, S. (2003), "Load carrying capacity of composite slabs with various end constraints", J. Constr. Steel Res., 59(3), 385-403. https://doi.org/10.1016/S0143-974X(02)00034-2.
  9. Chuan, D.L.Y., Abdullah, R. and Bakar, K.B. (2008), "Behaviour and load bearing capacity of composite slab enhanced with shear screws, 8(6), 501-549.
  10. Ferrer, M., Marimon, F. and Casafont, M. (2018), "An experimental investigation of a new perfect bond technology for composite slabs", Constr. Build. Mater., 166, 618-633. https://doi.org/10.1016/j.conbuildmat.2018.01.104.
  11. Ferrer, M., Marimon, F. and Crisinel, M. (2006), "Designing cold-formed steel sheets for composite slabs: An experimentally validated FEM approach to slip failure mechanics", Thin-Wall. Struct., 44(12), 1261-1271. https://doi.org/10.1016/j.tws.2007.01.010.
  12. Fonseca, A., Marques, B. and Simoes, R. (2015), "Improvement of the behaviour of composite slabs : A new type of end anchorage", Steel Compos. Struct., 19(6), 1381-1402. https://doi.org/10.12989/scs.2015.19.6.1381.
  13. ISO. (2009), ISO 6892-1. Metallic Materials - Tensile Testing - Part 1: Method of Test at Room Temperature. Switzerland.
  14. Johnson, R.P. and Shepherd, A.J. (2013), "Resistance to longitudinal shear of composite slabs with longitudinal reinforcement", J. Constr. Steel Res., 82, 190-194. https://doi.org/10.1016/j.jcsr.2012.12.005.
  15. Jolly, C.K. and Lawson, R.M. (1992), "End anchorage in composite slabs: an increased loadcarrying capacity", Struct. Eng., 70(11), 202-205.
  16. Porter, M.L. and Greimann, L.F. (1984), "Shear-bond Strength of Studded Steel Deck Slabs", Proceedings of the 7th International Specialty Conference on Cold-Formed Steel Structures. St. Louis, Estados Unidos da America.
  17. Rana, M.M., Uy, B. and Mirza, O. (2015), "Experimental and numerical study of end anchorage in composite slabs", J. Constr. Steel Res., 115, 372-386. https://doi.org/10.1016/j.jcsr.2015.08.039
  18. Salonikios, T.N., Sextos, A.G. and Kappos, A.J. (2012), "Tests on composite slabs and evaluation of relevant eurocode 4 provisions", Steel Compos. Struct., 13(6), 571-586. https://doi.org/10.12989/scs.2012.13.6.571.
  19. Saravanan, M., Marimuthu, V., Prabha, P., Arul Jayachandran, S., and Datta, D. (2012), "Experimental investigations on composite slabs to evaluate longitudinal shear strength", Steel Compos. Struct., 13(5), 489-500. https://doi.org/10.12989/scs.2012.13.5.489.
  20. Simoes da Silva, L., Rebelo, C., Nethercot, D., Marques, L., Simoes, R. and Real, P.M.M.V. (2009), "Statistical evaluation of the lateral - torsional buckling resistance of steel I-beams , Part 2 : Variability of steel properties", J. Constr. Steel Res., 65(4), 832-849. https://doi.org/10.1016/j.jcsr.2008.07.017.
  21. Simoes da Silva, L., Tankova, T., Marques, L. and Rebelo, C. (2018), "Safety assessment of EUROCODE 3 stability design rules for the lateral- torsional buckling of prismatic beams", Adv. Steel Constr., 14(4), 668-693. https://doi.org/10.18057/IJASC.2018.14.9.
  22. Yang, Y., Liu, R., Huo, X., Zhou, X. and Roeder, C.W. (2018), "Static experiment on mechanical behavior of innovative flat steel plate-concrete composite slabs", Int. J. Steel Struct., 18(2), 473-485. https://doi.org/10.1007/s13296-018-0012-3.