Influence of Interlayer in Timber-Concrete Composite Structures with Threaded Rebar as Shear Connector-Experimental Study

Decroly DJOUBISSIÉ DENOUWɹ, Adamah MESSAN^1, , Eric FOURNELY^{2, 3} and Abdelhamid BOUCHAIR^{1, 4}

¹Institut International d’ingénierie de l’Eau et de l’Environnement (2iE), Laboratoire Eco-Matériaux de Construction (LEMC), 01 BP 594 Ouagadougou 01, Burkina Faso

²Université Clermont Auvergne (UCA), Institut Pascal (IP), BP 10448, F-63000 Clermont-Ferrand, France

³CNRS, UMR 6602, Institut Pascal, F-63171 Aubière, France

⁴Université Clermont Auvergne (UCA), Institut Pascal (IP), BP 10448, F-63000 Clermont-Ferrand, France;CNRS, UMR 6602, Institut Pascal, F-63171 Aubière, France

Cite this paper:
Decroly DJOUBISSIÉ DENOUWÉ, Adamah MESSAN, Eric FOURNELY and Abdelhamid BOUCHAIR. Influence of Interlayer in Timber-Concrete Composite Structures with Threaded Rebar as Shear Connector-Experimental Study. American Journal of Civil Engineering and Architecture. 2018; 6(1):38-45. doi: 10.12691/ajcea-6-1-5

Abstract

The influence of interlayer on mechanical properties of timber-concrete composite structures using threaded rebar as shear connector is studied. Push-out tests are performed with two configurations of connection between timber and concrete with and without plywood interlayer: one threaded rebar and two cross-threaded rebars. The experimental study consists of push-out tests to characterize the failure modes, the load carrying capacity, and the stiffness for serviceability and ultimate limit states of the connections. The responses of the configurations with interlayer are compared with those without interlayer. The comparisons show that the presence of interlayer reduces the shear strength and the stiffness of the timber-concrete connection with threaded reinforcing bar as connector. Furthermore, based on the experimental results and using nonlinear regression, a mathematical model of each one of configurations of connection is derived which can be easily used with nonlinear FE analyses of Timber-Concrete Connection (TCC) beams.

Keywords:
timber-concrete connection tropical wood threaded rebar interlayer push-out tests

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