CYCLIC BEHAVIOUR OF A DOVETAIL-SHAPE NOTCHED CONNECTION FOR CROSS-LAMINATED-TIMBER-CONCRETE COMPOSITE SLABS - Université de Rennes Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

CYCLIC BEHAVIOUR OF A DOVETAIL-SHAPE NOTCHED CONNECTION FOR CROSS-LAMINATED-TIMBER-CONCRETE COMPOSITE SLABS

Résumé

Timber-concrete composite members can be used in medium-to-large span structures as a more sustainable but structurally efficient solution. The performance of such members relies largely on the degree of composite action, which is in turn dependent on the type of shear connectors used. Concrete notches are seen to perform well in terms of high strength and stiffness while retaining simplicity in installation as an efficient fabrication of the notches with different shapes can be carried out by high capacity machinery in warehouses. However, there is a lack of knowledge on the cyclic behaviour of these connectors, particularly when used in CLT-concrete composite floors. This paper presents an experimental study on notched connectors for CLT-concrete composite slabs by three symmetrical pushout tests under reversed-cyclic loading. The notched connector has a dovetail shape, which is able to limit the separation between the concrete and the CLT without the need for metallic screws or dowels. Shear capacities and ductility ratio were determined. The test results showed noticeable pinching effect, which became more pronounced after each series of cycles. This phenomenon was originated from compressive settlement of CLT layers that were in contact with the concrete notches and the degradation of the cross layer of the CLT, creating gaps when the load was reversed. The failure mode was governed by shear rupture of the CLT layer caused by rolling shear action, thus achieving low ductility. © Fédération Internationale du Béton – International Federation for Structural Concrete.
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Dates et versions

hal-03932235 , version 1 (10-01-2023)

Identifiants

  • HAL Id : hal-03932235 , version 1

Citer

A. Al Rahim, P. Heng, H. Somja, T. Soquet. CYCLIC BEHAVIOUR OF A DOVETAIL-SHAPE NOTCHED CONNECTION FOR CROSS-LAMINATED-TIMBER-CONCRETE COMPOSITE SLABS. 6th fib International Congress on Concrete Innovation for Sustainability, 2022, Jun 2022, Oslo, Norway. pp.773-782. ⟨hal-03932235⟩
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