Flexural behaviour of timber-concrete composite floor systems linearly supported at two edges. (15th April 2023)

• Record Type: Journal Article
• Authors: Ferrara, Giuseppe; Michel, Laurent; Ferrier, Emmanuel
• Is Part Of: Engineering structures. Volume 281(2023)
• Publication Date: 2023-04-15
• Subjects: Timber-Concrete Composites -- Wood -- Timber -- Concrete -- Glulam-concrete slabs -- Flexural behaviour -- Composite beams; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2023.115782
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Timber-concrete floors emerge as suitable prefabricated elements for constructions. Combined sand-epoxy resin connection system guarantees full interaction. Failure in bending occurs with full exploitation of timber beams capacity. Timber-concrete floors comply with performance requirements from standards. Abstract: Timber-concrete composite (TCC) structures consist of thin concrete slabs connected by stud or bonding to glulam beams. They emerged as a valuable system with light-weight elements characterised by high strength and stiffness. However, the structural efficiency of real-scale TCC floors with an adhesive-based connection systems requires further investigation to confirm the promising results of small-scale experimental studies. To contribute to this investigation, this study conducts real-scale experiments on five timber-concrete composite floor specimens that are linearly supported at two edges. The flexural behaviour of the system is assessed using a four-point bending test, and its strength and displacement capacity are also tested. The study also provides insights on the strain profile and relative displacement of the system's cross sections. The experimental results indicate that the composite structure has adequate mechanical behaviour that is characterised by a linear response up to failure, without relative displacement at the concrete–timber interface surface. The study confirms the potential of TCC floors as prefabricated construction elements, demonstrating that the system complies with standard performance requirements.