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The Structural Behaviour of Cross-Laminated Timber Rib Panels in Fire

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Abstract

In the frame of a research project, the structural behaviour in fire of cross-laminated timber rib panels were studied based on numerical investigations. The floor system consists of cross-laminated timber plates rigidly bonded to glued-laminated timber ribs. The numerical investigations comprised uncoupled thermo-mechanical simulations of two types of finite element models, a beam system and a flexible-in-shear multi-layered part, to investigate the influence of the effective width in fire. All models were validated against the experimental results of previously tested full-scale fire resistance tests. A parametric study analysed the composite cross‐sections’ effective width in fire for a parameter range expected in practice and gave proposals depending on the thickness of the CLT layers. For the conservative case of thin CLT layers, a limit value of 60% of the effective width at normal temperature is proposed as effective width in fire.

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Acknowledgements

The authors gratefully acknowledge the financial support from Stora Enso Wood Products GmbH in Ybbs, Austria, with special thanks to Niko Kumer, Thomas Demschner, and Julien Lapere. The authors would like to thank Thomas Gernay for his dedicated support with SAFIR®.

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Authors and Affiliations

  1. Basler & Hofmann AG, 8032, Zurich, Switzerland

    Miriam Kleinhenz

  2. Institute of Civil Engineering and Architecture, Tallinn University of Technology, 19086, Tallinn, Estonia

    Alar Just

  3. Institute of Structural Engineering, ETH Zurich, 8093, Zurich, Switzerland

    Andrea Frangi

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  1. Miriam Kleinhenz
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  2. Alar Just
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  3. Andrea Frangi
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Correspondence to Miriam Kleinhenz.

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Kleinhenz, M., Just, A. & Frangi, A. The Structural Behaviour of Cross-Laminated Timber Rib Panels in Fire. Fire Technol (2024). https://doi.org/10.1007/s10694-024-01552-6

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