Structural Behaviour of Sustainable and Efficient Steel-Timber Composite Floor Systems

Please note that this recording is from an earlier date.

Webinar  - 0.075 CEU

Duration: 59 m

Presented by Joshua Woods Assistant Professor at Queen's University

The use of steel-timber composite floor systems in modern construction offers an opportunity for a new lightweight, sustainable, and efficient floor system that can replace conventional steel-concrete composite systems. In this approach, the concrete topping is replaced with engineered wood (typically CLT or LVL) to form steel-timber composite sections, which allow for efficient installation and lower floor weight without the need for temporary shoring.

The aim of this session is to describe optimal shear connectors, quantify the behaviour of steel-timber composite beams, and compare the embodied carbon to conventional steel-concrete floor systems. To accomplish these objectives, the results from a large experimental campaign will be discussed, including direct shear tests to establish the load-slip behaviour of various connectors as well as results from a series of full-scale composite steel-timber beams tested under monotonic loading.

These experiments aimed to better understand the influence of shear connector spacing, CLT panel orientation, and steel section size on the degree of composite action and ultimate capacity. Distributed fibre optic strain sensors and digital image correlation were used to evaluate the structural response of the composite beams and to understand the strain distributions in the CLT panel. Theoretical methods to determine the load-slip behaviour of shear connectors, the moment-curvature relationships of steel-timber composite beams, as well as the embodied carbon of timber-steel floor slabs will also be discussed.

Eligibility for CEUs

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