CLT Connection Behaviour Under Extreme Deformations: Influence on Structural Robustness in Large Timber Construction

Alicja Przystup, Hannah Schrempf, Giedrius Visniauskas, Thomas Reynolds

Research output: Contribution to conferencePaper

Abstract / Description of output

Multi-storey timber construction has become increasingly popular over the past decades, largely due to its naturally low net carbon footprint. One of the important design considerations in structures of this scale is their robustness. Existing prescriptive design methods for robustness, generally developed for steel and concrete construction, cannot be directly applied to wooden structural systems without further research. Some experimental work is available on the catenary action formation in Cross-laminated timber (CLT) and Laminated Veneered Lumber (LVL), however, these tests focus on substructures and the results are difficult to generalise beyond the specific geometries and materials tested. This study focuses on developing a localised component test methodology of high repeatability which isolates the behaviour of individual elements and connections, and investigate their influence on the robustness of the structure as a whole. The experiments presented focus on two key components of CLT buildings: a continuous 5-ply CLT section and a half-lap floor joint. The solid section was tested under 3-point bending to investigate the deformations in CLT after rolling shear failure. Similarly, a 4-point bending test was performed on the half-lap joint to achieve the moment rotation curve. The force was applied until a drop of approximately 10% in the moment resistance was observed. The specimens were then transferred onto a tension testing rig. The study indicates that double span floors impede proprietary catenary formation and although the tested connections have the potential of forming catenaries, they have limited tensile and rotational capacities and may not be adequate for catenary formations in buildings above 4 storeys.
Original languageEnglish
Publication statusPublished - 9 Sept 2020
EventInstitute of Materials, Minerals & Mining Timber 2020 - Online
Duration: 1 Sept 2020 → …

Conference

ConferenceInstitute of Materials, Minerals & Mining Timber 2020
Abbreviated titleIOM3 Timber 2020
Period1/09/20 → …

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