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Flexural Behavior of Cross-Laminated Timber Panels with Environmentally Friendly Timber Edge Connections
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology.ORCID iD: 0009-0000-0380-386X
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology.ORCID iD: 0000-0002-9431-7820
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology.ORCID iD: 0000-0003-2023-689x
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Environmental Science.ORCID iD: 0000-0001-8413-3975
2024 (English)In: Buildings, E-ISSN 2075-5309, Vol. 14, no 5, article id 1455Article in journal (Refereed) Published
Abstract [en]

As a sustainable construction material, timber is more promoted than steel, concrete, and aluminum nowadays. The building industry benefits from using timber based on several perspectives, including decarbonization, improved energy efficiency, and easier recycling and disposal processes. The cross-laminated timber (CLT) panel is one of the widely utilized engineered wood products in construction for floors, which is an ideal alternative option for replacing reinforced concrete. One single CLT panel has an outstanding flexural behavior. However, CLT cannot be extended independently without external connections, which are normally made of steel. This article proposes two innovative adhesive-free edge connections made of timber, the double surface (DS) and half-lapped (HL) connections. These connections were designed to connect two CLT panels along their weak direction. Parametric studies consisting of twenty models were conducted on the proposed edge connections to investigate the effects of different factors and the flexural behavior of CLT panels with these edge connections under a four-point bending test. Numerical simulations of all the models were done in the current study by using ABAQUS 2022. Furthermore, the employed material properties and other relevant inputs (VUSDFLD subroutines, time steps, meshes, etc.) of the numerical models were validated through existing experiments. The results demonstrated that the maximum and minimum load capacities among the studied models were 6.23 kN and 0.35 kN, respectively. The load–displacement responses, strain, stress, and defection distributions were collected and analyzed, as well as their failure modes. It was revealed that the CLT panels’ load capacity was distinctly improved due to the increment of the connectors’ number (55.05%) and horizontal length (80.81%), which also reinforced the stability. Based on the findings, it was indicated that adhesive-free timber connections could be used for CLT panels in buildings and replace traditional construction materials, having profound potential for improving buildings’ sustainability and energy efficiency.

Place, publisher, year, edition, pages
MDPI, 2024. Vol. 14, no 5, article id 1455
Keywords [en]
cross-laminated timber; adhesive-free edge connection; load capacity; finite element method; flexural behavior; VUSDFLD subroutine
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:hig:diva-44189DOI: 10.3390/buildings14051455ISI: 001233055600001Scopus ID: 2-s2.0-85194182499OAI: oai:DiVA.org:hig-44189DiVA, id: diva2:1859848
Available from: 2024-05-22 Created: 2024-05-22 Last updated: 2024-06-09Bibliographically approved

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Ren, HonghaoBahrami, AlirezaCehlin, MathiasWallhagen, Marita

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