Small scale tests on the performance of adhesives used in cross laminated timber (CLT) at elevated temperatures

Zelinka, Samuel L.; Sullivan, Ken; Pei, Shiling; Ottum, Noah; Bechle, Nathan J.; Rammer, Douglas R.; Hasburgh, Laura E.

doi:10.1016/j.ijadhadh.2019.102436

Cited by 32 publications

(26 citation statements)

References 4 publications

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“…This section explains the materials, methods and procedures used in numerical and analytical modelling of thermal structural properties of glued timber panels. The results from the simulations will be compared with what Zelinka et al [7] got from his experimental studies. The tree species studied were Douglas Fir (DF), which is scientifically referred to as Pseudotsuga Menziesii, Southern Yellow Pine (SYP), whose scientific name is Pinus Taeda (for Loblolly Pine) and Spruce Pine Fir (SPF), which is also referred to as Picea Engelmanni (for Engelmann Spruce).…”

Section: Introduction and Materials' Propertiesmentioning

confidence: 92%

“…According to EN 15425:2017 the thickness of glue layer is 0.3 mm. The dimensions of the specimen used were extracted from the one used in Zelinka et al [7] experiments. The thickness of the specimen was 21 mm, width was 22.…”

Section: Analytical Modelmentioning

confidence: 99%

“…Most of the wood adhesives used are either, urea formaldehyde (UF), phenol formaldehyde (PF), polyurethane (PUR) and melamine urea formaldehyde (MUF) resins to produce engineered wood products [7][8][9]. Engineered wood products are based on using adhesives to stick various lamellas (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…The performance of load-bearing timber structures during and after a fire is a challenge within the context of ensuring the structural stability and integrity of a building structure. Hence, delamination can occur when the adhesive bond line fails in the CLT panel before charring, increasing on the fuel that can lead to fire regrowth [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Modelling of Elevated Temperature Performance of Adhesives Used in Cross Laminated Timber: An Application of ANSYS Mechanical 2020 R1 Structural Analysis Software

Okuni

Bradford

2020

The 1st International Electronic Conference on Forests—Forests for a Better Future: Sustainability, Innovation, Inter

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There is difficulty in accurately modelling adhesive influence in structural performance of cross laminated timber (CLT), due to a lack of available knowledge on the heat performance of adhesives. Therefore, the main aim of this research was to evaluate the thermal and mechanical properties of adhesives used in production of engineered wood products like CLT. The properties of the timber species and the adhesive types used in the simulation were derived from published literature and handbooks. ANSYS mechanical 2020 R1 was employed because it has a provision for inserting the thermal condition and the temperature of the system set to the required one for analysis. The simulations were conducted for temperatures 20, 100, 140, 180, 220, and 260 °C, within which Zelinka et al. conducted their experiments, which have been the basis for the current study. The main findings were, the adhesive layer had little influence on the thermal properties of CLT composite (solid wood had the same thermal properties as CLT), but had a significant effect on the structural properties of CLT composite, the stresses and strains of the simulated wood species reduced with increase in temperature, the adhesives strengths at room temperature were greater than for solid wood at the same temperature and finally, the stresses and strains of the simulated wood adhesives reduced with increase in temperature. It is also important to note that computations for temperature distribution from the char layer were lower than computed using heat transfer equation, and the simulated values from steady state model. All in all, the objectives of this research were met and more research in thermal structural modelling using ANSYS should be conducted in the future.

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Section: Introduction and Materials' Propertiesmentioning

confidence: 92%

Section: Analytical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modelling of Elevated Temperature Performance of Adhesives Used in Cross Laminated Timber: An Application of ANSYS Mechanical 2020 R1 Structural Analysis Software

Okuni

Bradford

2020

The 1st International Electronic Conference on Forests—Forests for a Better Future: Sustainability, Innovation, Inter

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“…Additionally, studies presented by Stoeckel (Stoeckel, Konnerth, & Gindl-Altmutter, 2013) showed that PUR adhesives tended to show high elastic modulus losses of up to 70% at 70°C. In contrast to the PVA and PUR performances, studies conducted by Stoeckel et al (Stoeckel et al, 2013), Zelinka et al (Zelinka et al, 2018) and Frangi et al (Frangi, Fontana, & Mischler, 2004) demonstrated that in laminated products using PRF, wood reached failure in 80% of the cases when subjected to elevated temperatures, showing that PRF maintains the composite action between the lamellas until the failure in timber is reached. Through a series of tests to assess delamination of CLT samples under shear, Dagenais and Ranger (2018) found that two different types of test samples with MF and PRF did not present delamination, whereas samples with PUR adhesive in the glue lines presented delamination and fall-off of the char lamella (Dagenais & Ranger, 2018).…”

Section: Behaviour Of Adhesives At Elevated Temperaturesmentioning

confidence: 99%

Fire analysis of load-bearing bamboo structures

González¹

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The remarkable high strength-to-weight ratio of bamboo and the recent innovations and development of laminated bamboo products has enabled the potential for new larger and taller structural bamboo applications. However, there is little understanding of the behaviour and performance of bamboo structures during and after a fire. To date, bamboo has been used widely in low-rise constructions I am infinitely grateful with my amazing friends from the coffee, and beer club, Angela, Aaron, Juan Patricio, Ian, Luis, Sergio, Jaime, Andrea, Abed. I would not have completed this journey without your support and positive energy. They became like my family in Brisbane, and when I had to push uphill, they were always there to struggle with me, to motivate me, to make me grow, and make me laugh in the happiest and most difficult moments. My love and respect go to the UQ Fire family for their support, enlightening conversations, and diligent work.

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Small Scale Test to Measure the Strength of Adhesives at Elevated Temperatures for Use in Evaluating Adhesives for Cross Laminated Timber (CLT)

Zelinka

Miyamoto

Bechle

et al. 2020

Wood &Amp; Fire Safety

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Small scale tests on the performance of adhesives used in cross laminated timber (CLT) at elevated temperatures

Cited by 32 publications

References 4 publications

Modelling of Elevated Temperature Performance of Adhesives Used in Cross Laminated Timber: An Application of ANSYS Mechanical 2020 R1 Structural Analysis Software

Modelling of Elevated Temperature Performance of Adhesives Used in Cross Laminated Timber: An Application of ANSYS Mechanical 2020 R1 Structural Analysis Software

Fire analysis of load-bearing bamboo structures

Small Scale Test to Measure the Strength of Adhesives at Elevated Temperatures for Use in Evaluating Adhesives for Cross Laminated Timber (CLT)

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