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Strengthening of Cross-Laminated Timber by adding aluminium plates
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknik.ORCID-id: 0000-0002-0900-5110
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknik.ORCID-id: 0000-0002-0145-080x
2019 (engelsk)Konferansepaper, Oral presentation with published abstract (Fagfellevurdert)
Abstract [en]

Wood is commonly judged as orthotropic with three material directions: longitudinal, radial and tangential. Shear stressand strain can occur in different directions on surfaces with different directions and shear stiffness is commonlydescribed by three shear moduli. Of those, the weakest shear modulus is called the rolling shear modulus.Cross laminated timber (CLT) is a rather recent and innovative engineered wood product with properties that can be improved and which still requires research. The benefits of using wood in buildings and construction are far from beingmaximized. During recent years, timber has been used for constructing higher buildings. It has been seen that previous small and acceptable movements of the building are magnified, which can create discomfort for the occupants. In these cases, the problem is the low in-plane shear stiffness of the CLT panel. One way to increase the in-plane shear stiffness is to build CLT mixed with other materials, with high modulus of shear, and by that increase the in-plane shear stiffness of the CLT panel. A practical test and finite element analysis (FEA) of the shear modulus was performed on 3-layer samples reinforced with aluminium plates. The panels were built by three layer of wooden lamellas and the aluminium plate was added between the first and second and/or second and third layer of boards. Two different thicknesses of the aluminium plate were used, 1 mm and 1.5 mm. Also, panels without aluminium plates were used as reference. Diagonal compression test was performed on the CLT panels, where the modulus of shear could be calculated. The diagonal compression method was performed based on experience from Andreolli. The panels containing aluminium plates had a higher shear modulus than panels without aluminium plates. This was concluded in both the practical testing and FEA.

sted, utgiver, år, opplag, sider
2019.
HSV kategori
Identifikatorer
URN: urn:nbn:se:ltu:diva-74875OAI: oai:DiVA.org:ltu-74875DiVA, id: diva2:1328807
Konferanse
CompWood 2019, June 17-19 2019 in Växjö, Sweden.
Tilgjengelig fra: 2019-06-23 Laget: 2019-06-23 Sist oppdatert: 2019-06-23

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Turesson, JonasEkevad, Mats

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