Fostering Composite Structures of UHPC and Timber

  • Luca Sorelli (Université Laval)
  • Nicolas Naud (Université Laval)
  • Serge Lamonthe (Université Laval)
  • Catherine Joly-Lapalice (Université Laval)
  • Pierre Blanchet (Université Laval)


Timber-Concrete Composite (TCC) structures are emerging in bridge and multi-storey buildings as they allow optimizing multiple performances, such as the structural stiffness and strength, enchanted vibration behavior, improved durability, and lower environmental impact in terms of carbon dioxide emission. The composite action consists of a couple of axial forces that significantly contribute to the resistant moment. This work aims at fostering the use of UHPFRC slab for TCC structures by taking advantage of the high compressive strength and shear resistance. In particular, two kinds of TCC structures are considered: (i) UHPFRC slab connected to a GLULAM (Glued Laminated) timber beam; (ii) UHPFRC slab connected with a Cross Laminated Timber slab. The threefold methodology consists of : (i) a multi-criteria design optimization, which considers vibrational effect and long term deflection; (ii) experimental characterization of shear behavior by push-out tests; (iii) vibrational and structural tests on four point bending tests on long span TCC beams; (iv) non-linear Finite-Element analysis. The present results show the important potentials of UHPFRC for reducing the weight and increasing the slenderness of TCC structures.

Keywords: composite action, serviceability limit state, vibration, composite slab, residential floor

How to Cite:

Sorelli, L., Naud, N., Lamonthe, S., Joly-Lapalice, C. & Blanchet, P., (2019) “Fostering Composite Structures of UHPC and Timber”, International Interactive Symposium on Ultra-High Performance Concrete 2(1). doi:

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Published on
01 Jun 2019