EXPERIMENTAL TESTING ON AN INNOVATIVE NOTCHED CONNECTION FOR TIMBER-CONCRETE COMPOSITE STRUCTURES - Université de Rennes Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

EXPERIMENTAL TESTING ON AN INNOVATIVE NOTCHED CONNECTION FOR TIMBER-CONCRETE COMPOSITE STRUCTURES

Résumé

In an effort towards the achievement of more sustainable buildings in construction, the use of timber structures has seen a rise these past few years. If combined with concrete elements, such structures provide great compromise between resistance and sustainability. Connections used in timber-concrete composite structures may consist of concrete notches which must be associated to metallic screws. Those allow to limit the uplift between both elements, to increase the connection’s strength as well as improve its ductility. To avoid the use of such steel screws, an innovative design of a concrete notch has been developed. The shape of the notch should be able to limit the uplift without the necessity of an additional steel component. In addition, the proposed notched connection with three shear planes presents an increased strength against shear forces compared to classic notched connections. This study aims at characterising the behaviour of such a connection by performing six symmetrical push out tests with different (i) timber properties and (ii) notch geometries. Furthermore, the study aims at evaluating the effects of the presence of reinforcements in the notch. The purpose is to determine the shear strength, the stiffness and the ductility of the connection. Results point out the important strength and stiffness of the connection. All connections tested show larger stiffness compared to those achieved with metallic screws and more strength than classic notched connections. Failure is governed by the compressive crushing of the timber, thus highlighting great ductility of the system. © Fédération Internationale du Béton – International Federation for Structural Concrete.
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Dates et versions

hal-03932229 , version 1 (10-01-2023)

Identifiants

  • HAL Id : hal-03932229 , version 1

Citer

L. Gérard, P. Heng, C. Lepourry, A. Al Rahim, H. Somja. EXPERIMENTAL TESTING ON AN INNOVATIVE NOTCHED CONNECTION FOR TIMBER-CONCRETE COMPOSITE STRUCTURES. 6th fib International Congress on Concrete Innovation for Sustainability, 2022, Jun 2022, Oslo, Norway. pp.614-623. ⟨hal-03932229⟩
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