STRENGTH AND DEFORMABILITY OF RAW WOOD AFTER FIRE EXPOSURE
https://doi.org/10.33979/2073-7416-2022-104-6-40-49
Abstract
The study of wood with reduced physical and mechanical characteristics, including wood exposed to fire, is an important step towards economical and rational environmental management. Fires cause changes in the physical and mechanical properties of wood: moisture content, density and strength. Conducted tests for static bending, compression and tension along the fibers. Decrease in density and strength in fire-prone wood occurs along the entire height of the trunk. The following pattern is observed: in the butt part, the density is higher than in the middle part. The decrease in strength in the middle and butt parts is: in compression along the fibers 15-18%; when stretched along the fibers up to 24%. The highest loss of strength occurred in tests for static bending: in the top part up to 42%, in the middle part up to 29%, in the buttom part up to 23%. The smallest decrease in strength in all tests occurred in samples taken from the buttom.
About the Authors
Anastasiya V. Lukina
Vladimir State University named after Alexander and Nikolay Stoletovs
Russian Federation
Russian Federation
Mikhail S. Lisyatnikov
Vladimir State University named after Alexander and Nikolay Stoletovs
Russian Federation
Russian Federation
Vladislav Al. Martinov
Vladimir State University named after Alexander and Nikolay Stoletovs
Russian Federation
Russian Federation
Svetlana Iv. Roschina
Vladimir State University named after Alexander and Nikolay Stoletovs
Russian Federation
Russian Federation
References
1. Xu K., Huang S., He F. Modeling fire hazards for the maintenance of long-term forest inventory plots in Alberta, Canada. For. Ecol. Manage. 2022. No. 513. Pp. 650-663. doi:10.1016/j.foreco.2022.120206
2. Pontes-Lopes A., Dalagnol R., Dutra A.C., De Jesus Silva C.V., De Alencastro Graça P.M.L., de Oliveira e Cruz de L.E. Quantifying Post-Fire Changes in the Aboveground Biomass of an Amazonian Forest Based on Field and Remote Sensing Data. Remote Sens. 2022. No. 14. doi:10.3390/rs14071545
3. Подсчитан ущерб от лесных пожаров в США [Электронный ресурс]. URL: https://lenta.ru/news/2022/05/13/fiiire/(дата обращения: 15.10.2022)
4. В Минприроды оценили экономический ущерб от лесных пожаров в России в 2021 году [Электронный ресурс]. URL: https://tass.ru/ekonomika/13265341(дата обращения: 15.10.2022)
5. Леса горят… Разрушительные пожары 2018 года - следствие глобального потепления [Электронный ресурс]. URL: https://lesprominform.ru/jarticles.html?id=5165(дата обращения: 15.10.2022)
6. Giddey B.L., Baard J.A., Kraaij T. Fire severity and tree size affect post-fire survival of Afrotemperate forest trees. Fire Ecol. 2022. No. 18. doi:10.1186/s42408-022-00128-5
7. Shive K.L., Wuenschel A., Hardlund L.J., Morris S., Meyer M.D., Hood S.M. Ancient trees and modern wildfires: Declining resilience to wildfire in the highly fire-adapted giant sequoia. For. Ecol. Manage. 2022. No. 511. doi:10.1016/j.foreco.2022.120110
8. Peterson D., Finney M., Skinner C., Kaufmann M., Johnson M., Shepperd W., Harrington M., Keane R., McKenzie D., Reinhardt E., Reinhardt E., Ryan K. Science basis for changing forest structure to modify wildfire behavior and severity. USDA For. Serv. - Gen. Tech. Rep. RMRS-GTR. 2004. Pp. 1-49
9. Hugi E., Wuersch M., Risi W., Ghazi Wakili K. Correlation between charring rate and oxygen permeability for 12 different wood species. J. Wood Sci. 2007. No. 53. Pp. 71-75. doi:10.1007/s10086-006-0816-1
10. Harada T. Charring of wood with thermal radiation II. Charring rate calculated from mass loss rate. Mokuzai Gakkaishi/Journal Japan Wood Res. Soc. 1996. No. 42. Pp. 194-201
11. Martin F. The Hamptons at MetroWest, a case study of structural repairs to rot-damaged wood condominium buildings. Structures Congress 2014 - Proceedings of the 2014 Structures Congress. Pp. 1244-1254. doi:10.1007/978-3-030-42351-3_14
12. Платонов А.Д., Курьянова Т.К., Снегирева С.Н., Макаров В.А. Изменение плотности древесины сосны, поврежденной пожаром при длительном хранении в различных условиях // Лесотехнический журнал. 2014. Т. 4. № 1 (13). С. 133-135. doi:10.12737/3356
13. Galyautdinov, A., Chernykh, A., Glukhikh, V., Furman, E., Polozhencev, V. Method of Calculation and Placement of Spring Force Compensators in Log Structures of Wooden Housing Construction. 2022. doi:10.1007/978-3-030-85236-8_12
14. Sergeev M., Lukina A., Zdralovic N., Reva D. Stress-Strain State of a Wood-Glued Three-Span Beam with Layer-By-Layer Modification. 2022. doi:10.1007/978-3-030-85236-8_43
15. Lukina A., Roshchina S., Lisyatnikov M., Zdralovic N., Popova O. Technology for the Restoration of Wooden Beams by Surface Repair and Local Modification. 2022. doi:10.1007/978-3-030-96383-5_153
16. Lukina A., Roshchina S., Gribanov A. Method for Restoring Destructed Wooden Structures with Polymer Composites. 2021. doi:10.1007/978-3-030-72404-7_45
17. Lisyatnikov M., Lukina A., Chibrikin D., Labudin, B. The Strength of Wood-Reinforced Polymer Composites in Tension at an Angle to the Fibers. 2022. doi:10.1007/978-3-030-85236-8_46
18. Roschina S., Gribanov A., Lukin M., Lisyatnikov, M., Strekalkin, A. Calculation of wooden beams reinforced with polymeric composites with modification of the wood compression area. MATEC Web of Conferences 2018. doi:10.1051/matecconf/201825104029
19. Lukina A., Lisyatnikov M., Martinov V. [et al.]. Mechanical and Microstructural changes in post-fire raw wood. Architecture and Engineering. 2022. Vol. 7. No 3. Pp. 44-52. doi:10.23968/2500-0055-2022-7-3-44-52
20. Платонов А.Д., Огурцов В.А., Туркина Ю.О. Изменение плотности древесины сосны после повреждения пожаром // Лесотехнический журнал. 2012. № 3 (7). С. 7-11
Review
For citations:
Lukina A.V., Lisyatnikov M.S., Martinov V.A., Roschina S.I. STRENGTH AND DEFORMABILITY OF RAW WOOD AFTER FIRE EXPOSURE. Building and Reconstruction. 2022;(6):40-49. (In Russ.) https://doi.org/10.33979/2073-7416-2022-104-6-40-49
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