Physical and Mechanical Properties of Coniferous Wood After Exposure to Fire

Martinov, Vladislav; Lisyatnikov, Mikhail; Roshchina, Svetlana; Lukina, Anastasiya

doi:10.1007/978-3-031-30570-2_18

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Lecture Notes in Civil Engineering

2023

DOI: 10.1007/978-3-031-30570-2_18

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Physical and Mechanical Properties of Coniferous Wood After Exposure to Fire

Vladislav Martinov,

Mikhail Lisyatnikov,

Svetlana Roshchina

et al.

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2024

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Cited by 2 publications

References 22 publications

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Manufacturing technology of glued wooden structures with the use of wood damaged by the fire impact of a forest fire

Martynov,

Lisyatnikov,

Lukina

et al. 2024

Forestry Engineering Journal

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Caring for natural resources is one of the most important components of the sustainable development of the national economy of the Russian Federation. This is facilitated by the use of low-grade wood, including fire-damaged wood, as a structural material, which will reduce the cost of producing laminated wood structures (GWB) through the use of cheaper raw materials. Based on a systematic analysis of sources and our own empirical research, the features of a new technology for manufacturing laminated wood beams with a span of 6.0 m using wood damaged by fire from a forest fire are presented. This study is aimed at reducing the material intensity of laminated timber structures through the partial use of low-grade wood without reducing the load-bearing capacity of the beams. It was found that when replacing 36% of the middle lamellas in the cross-section with thermally damaged wood, the reduction in the load-bearing capacity of the beam structure relative to a beam made entirely of grade I wood was 9.7%, and when replacing 62% of the wood – 16.06%. The use of thermally damaged wood in the manufacture of laminated wood structures will significantly reduce the use of high-grade lumber with some changes in the technological process that do not lead to an increase in its cost. Using the positive experience of testing beam FDCs, it is planned to further study the use of thermally damaged wood in compression-bending structures.

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Manufacturing technology of glued wooden structures with the use of wood damaged by the fire impact of a forest fire

Martynov,

Lisyatnikov,

Lukina

et al. 2024

Forestry Engineering Journal

Self Cite

View full text Add to dashboard Cite

show abstract

Investigation of the strength and deformability of glued wooden beams with lamellas made of thermally damaged (Pinus sylvestris L.) wood based on experimental planning

Martynov,

Myasnikov,

Roshchina

2024

Forestry Engineering Journal

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The wood of Scots pine (Pinus sylvestris L.), which has been partially charred due to a forest fire, exhibits sufficiently high physical and mechanical properties to be used as a structural material. This wood can be incorporated into the middle sections of glued wooden beams. In order to optimize the strength and flexibility of the beam structure, we conducted a multifactor experiment to determine the optimum variable factors: 1) the location of wood selection based on the height of the tree trunk; 2) the ratio of the cross-sectional area of fire-damaged wood to the total cross-section area of the glued beam; 3) the thickness of the laminae used based on the results of this experiment. Developed a regression equation: ∆Q = 38.7366 – 0.0277 N – 0.0389 T – 0.1283 P – 0.00009 NT, where ∆Q is the difference in load-carrying capacity, N is the number of tests, T is the thickness of laminae, and P is the percentage of fire-damaged wood. The resulting equation is deemed adequate based on the Fisher criterion Fp = 0.033 at a 5% significance level. The condition Fp < Ft is met, indicating that the maximum bearing capacity for glued wooden beams incorporating lamellas from thermally damaged wood is P. sylvestris is produced with an average wood density of 471.6 kg/m³ taken from the bottom of the trunk. The ratio of wood damaged by fire in the cross-section area to the overall cross-sectional area of the glueless beam is 24%, and the lamella thickness is 33 mm. The ratio of wood damaged by fire has the most significant impact on the bearing capacity of the beam structure, followed by lamella thickness, and finally wood density, which depends on the location of wood collection along the trunk height.

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Physical and Mechanical Properties of Coniferous Wood After Exposure to Fire

Cited by 2 publications

References 22 publications

Manufacturing technology of glued wooden structures with the use of wood damaged by the fire impact of a forest fire

Manufacturing technology of glued wooden structures with the use of wood damaged by the fire impact of a forest fire

Investigation of the strength and deformability of glued wooden beams with lamellas made of thermally damaged (Pinus sylvestris L.) wood based on experimental planning

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