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Composite Wood-Concrete Structural Floor System with Horizontal Connectors

  • SaRibeiro, Ruy A. (Structural Engineering Laboratory, National Institute for Amazonian Research (INPA)) ;
  • SaRibeiro, Marilene G. (Structural Engineering Laboratory, National Institute for Amazonian Research (INPA))
  • Received : 2013.12.20
  • Accepted : 2014.09.18
  • Published : 2015.03.30

Abstract

The concept of horizontal shear connection utilization on wood-concrete beams intends to be an alternative connection detail for composite wood-concrete decks. The volume of sawn-wood is over three times more expensive than concrete, in Brazil. In order to be competitive in the Brazilian market we need a composite deck with the least amount of wood and a simple and inexpensive connection detail. This research project uses medium to high density tropical hardwoods managed from the Brazilian Amazon region and construction steel rods. The beams studied are composed of a bottom layer of staggered wood boards and a top layer of concrete. The wood members are laterally nailed together to form a wide beam, and horizontal rebar connectors are installed before the concrete layer is applied on top. Two sets of wood-concrete layered beams with horizontal rebar connectors (6 and 8) were tested in third-point loading flexural bending. The initial results reveal medium composite efficiency for the beams tested. An improvement on the previously conceived connection detail (set with six connectors) for the composite wood-concrete structural floor system was achieved by the set with eight connectors. The new layout of the horizontal rebar connectors added higher composite efficiency for the beams tested. Further analysis with advanced rigorous numerical Finite Element Modeling is suggested to optimize the connection parameters. Composite wood-concrete decks can attend a large demand for pedestrian bridges, as well as residential and commercial slabs in the Brazilian Amazon.

Keywords

References

  1. Brown, K. T. (1998). Testing of a Shear Key/Anchor in Layered Wood/Concrete Beams. M. S. Thesis, Department of Civil Engineering, Colorado State University, Ft. Collins, CO.
  2. Brown, K. T., Gutkowski, R. M., Criswell, M. E., & Peterson, M. L. (1998). Testing of a shear key/anchor in layered wood/concrete beams, Structural Research Report No. 76, Civil Engineering Department, Colorado State University, Ft. Collins, CO.
  3. Ceccotti, A., Fragiacomo, M., & Giordano, S. (2006). Longterm and collapse tests on a timber-concrete composite beam with glued-in connection. Materials and Structures, 40, 15-25.
  4. Chen, T.-M., Gutkowski, R. M., & Pellicane, P. J. (1992). Tests and analysis of mixed wood-concrete wood beams, Structural Research Report No. 69, Civil Engineering Department, Colorado State University, Ft. Collins, CO.
  5. Clouston, P., & Schreyer, A. (2008). Design and use of wood-concrete composites. Practice Periodical on Structural Design and Construction, 13(4), 167-174. https://doi.org/10.1061/(ASCE)1084-0680(2008)13:4(167)
  6. CEN, Comite Europeen de Normalisation. (2002). Eurocode-Basis of structural design. EN 1990. Brussels, Belgium.
  7. CEN, Comite Europeen de Normalisation. (2003). Eurocode 5-Design of timber structures. EN 1995-1. Brussels, Belgium.
  8. CEN, Comite Europeen de Normalisation. (2004). Eurocode 5-Design of timber structures. EN 1995-2. Brussels, Belgium.
  9. Dias, A. M. P. G., Ferreira, M. C. P., Jorge, L. F. C., & Martins, H. M. G. (2011). Timber-concrete practical applicationsbridge case study. Proceedings of the Institution of Civil Engineers: Structures and Buildings, 164(2), 131-141.
  10. Etournaud, P. A. (1998). Loads Tests of Composite Wood-Concrete Deckings Under Point Loads. M. S. Thesis, Department of Civil Engineering, Colorado State University, Ft. Collins, CO.
  11. Etournaud, P. A., Gutkowski, R. M., Peterson, M. L., & Criswell, M. E. (1998). Loads tests of composite wood-concrete deckings under point loads, Structural Research Report No. 81, Civil Engineering Department, Colorado State University, Ft. Collins, CO.
  12. Faggiano, B., Marzo, A., Mazzolani, F. M., & Calado, L. M. (2009). Analysis of rectangular-shaped collar connectors for Composite timber-steel-concrete floors: Push-out tests. Journal of Civil Engineering and Management, 15(1), 47-58. https://doi.org/10.3846/1392-3730.2009.15.47-58
  13. Fragiacomo, M. (2006). Long-term behavior of timber-concrete composite beams. II: Numerical analysis and simplified evaluation. Journal of Structural Engineering, 132(1), 23-33. https://doi.org/10.1061/(ASCE)0733-9445(2006)132:1(23)
  14. Fragiacomo, M., & Batchelar, M. (2012). Timber frame moment joints with glued-in steel rods. II: Experimental investigation of long-term performance. Journal of Structural Engineering, 138(6), 802-811. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000517
  15. Fragiacomo, M., & Ceccotti, A. (2006). Long-term behavior of timber-concrete composite beams. I: Finite Element Modeling and validation. Journal of Structural Engineering, 132(1), 13-22. https://doi.org/10.1061/(ASCE)0733-9445(2006)132:1(13)
  16. Fragiacomo, M., Gutkowski, R. M., Balogh, J., & Fast, R. S. (2007). Long-term behavior of wood-concrete composite floor/deck systems with shear key connection detail. Journal of Structural Engineering, 133(9), 1307-1315. https://doi.org/10.1061/(ASCE)0733-9445(2007)133:9(1307)
  17. Fragiacomo, M., & Schanzlin, J. (2013). Proposal to account for environmental effects in design of timber-concrete composite beams. Journal of Structural Engineering, 139(1), 162-167. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000605
  18. Grantham, R., Enjily, V., Fragiacomo, M., Nogarol, C., Zidaric, I., & Amadio, C. (2004). Potential upgrade of timber frame buildings in the UK using timber-concrete composites. In Proceedings 8th World Conference on Timber Engineering. Lahti, Finland.
  19. Gutkowski, R. M., Balogh, J., Natterer, J., Brown, K., Koike, E., & Etournaud, P. (2000). Laboratory tests of composite wood-concrete beam and floor specimens. In Proceedings of World Conference on Timber Engineering 2000. Whisthler Resort, BC, Canada.
  20. Gutkowski, R. M., Balogh, J., Rogers, C. C., & SaRibeiro, R. A. (2002). Laboratory tests of deep composite wood-concrete beam and deck specimens. In Proceedings of the 4th Structural Specialty Conference of the Canadian Society of Civil Engineering (pp. 1-9). Quebec, Canada: 30th Annual CSCE Conference Montreal.
  21. Gutkowski, R. M., Balogh, J., SaRibeiro, R. A. (2001). Modeling and testing of composite wood-concrete deep beam specimens. In Proceedings of STRUCTURAL FAULTS ? REPAIR-01, 10th International Conference and Exhibition. London, UK.
  22. Gutkowski, R. M., Brown, K., Shigidi, A., & Natterer, J. (2004). Investigation of notched composite wood-concrete connections. Construction and Building Materials, 22, 1059-1066.
  23. Gutkowski, R. M., Brown, K., Shigidi, A., & Natterer, J. (2008). Laboratory tests of composite wood-concrete beams. Journal of Structural Engineering, 130(10), 1553-1561.
  24. Gutkowski, R. M., & Chen, T.-M. (1996). Tests and analysis of mixed concrete-wood beams, In Proceedings of the International Wood Engineering Conference (pp. 3.436-3.442). Madison, WI: Omnipress.
  25. Gutkowski, R. M., Thompson, W., Brown, K., Etournaud, P., Shigidi, A., & Natterer, J. (1999a). Laboratory tests of composite wood-concrete beam and deck specimens. In Proceedings of 1999 RILEM Symposium on Timber Engineering (pp. 263-272). Stockholm, Sweden.
  26. Gutkowski, R. M., Koike, W. E., Etournaud, P. J.-F., & Natterer, J. (1999b). Laboratory tests of composite wood-concrete beam and deck specimens. In Proceedings of STRUCTURAL FAULTS ? REPAIR-99, 8th International Conference and Exhibition. London, UK.
  27. Lukaszewska, E., Johnsson, H., & Fragiacomo, M. (2008). Performance of connections for prefabricated timber-concrete composite floors. Materials and Structures, 41(9), 1533-1550. https://doi.org/10.1617/s11527-007-9346-6
  28. Natterer, J. (1997). Sustainable economy of forestry and value added utilization of forests: The only chance to save the forests of the world, State-of-the-Art Paper in Restoration of Forests-Environmental Challenges in Central and Eastern Europe. In R. Gutkowski, & Winnicki, T Proceedings of the NATO Advanced Research Workshop on Science and Technology to Save and Better Utilize Central and Eastern Europes Forests (pp. 97-118). New York, NY: Kluwer Academic Publishers.
  29. Pault, J. D., & Gutkowski, R. M. (1977). Composite action in glulam timber bridge systems, Structural Research Report No. 17B, Civil Engineering Department, Colorado State University, Ft. Collins, CO.
  30. SaRibeiro, R. A., Rocha, J. S., & SaRibeiro, M. G. (2006). Vigas de madeira-concreto com conectores de residuos de construcao. In Anais/BRASIL NOCMAT 2006-Salvador-Conferencia Brasileira de Materiais e Tecnologias Nao-Convencionais: Materiais e Tecnologias para Construcoes Sustentaveis (pp. 1-7) (in Portuguese).
  31. SaRibeiro, R. A., & SaRibeiro, M. G. (1990). Mechanical properties of Amazonian lumber for the development of design stresses. In Proceedings of the 1990 International Timber Engineering Conference (Vol. 3, pp. 819-826). Tokyo, Japan.
  32. Wegener, W., & Zimmer, B. (1998). The ecological benefits of increased timber utilization, In Proceedings of the 5th World Conference on Timber Engineering (Vol. 1, pp. 1656-1663). Montreux, LA: Presse polytechniques et universitaires romandes.
  33. Winter, W. (1998). Economical and ecological aspects of multistory timber buildings in Europe. In Proceedings of the 5th World Conference on Timber Engineering (Vol. 1, pp. 1664-1668). Montreux, LA: Presse polytechniques et universitaires romandes.

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