Journal of the Korean Wood Science and Technology

  • 제48권1호
  • /
  • Pages.12-21
  • /
  • 2020
  • /
  • 1017-0715(pISSN)
  • /
  • 2233-7180(eISSN)
한국목재공학회 (The Korean Society of Wood Science & Technology)
권호 표지
DOI QR코드

DOI QR Code

Changes in Mechanical Properties of Wood Due to 1 Year Outdoor Exposure

  • KIM, Gwang-Chul (Department of Housing Environmental Design, Chonbuk National University) ;
  • KIM, Jun-Ho (Department of Housing Environmental Design, Chonbuk National University)
  • 투고 : 2019.07.29
  • 심사 : 2019.10.16
  • 발행 : 2020.01.25
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

For quantitative evaluation of wooden structures, the mechanical performance of members has undergone outdoor exposure tests. A year-long monitoring was conducted using an SPF species. Test groups were divided into twelve (each month) to measure the moisture content, density and ultimate load. Starting from May when moisture content of the test group was at the lowest, simple failure modes were observed more frequently during the first half of the experiment, whereas complex failure modes took over during the second half. Starting from June when moisture content of the test group was the highest, ultimate load decreased by 30% in the second half compared to the first half. A multiple regression analysis confirmed that moisture content of the test group was the variable with most effect on ultimate load of various outdoor variables, and an estimation equation of a simple regression analysis revealed that moisture content and ultimate load formed an inversely proportionate relationship. It is thought that correlational relationships of variables other than moisture content could be applied with the increase in added data amount by longer periods of outdoor exposure tests.

키워드

참고문헌

  1. ASTM G7/G7M-13. 2013. Standard practice for atmospheric environmental exposrue testing of nonmetallic materials. American Society for Testing and Materials(ASTM), West Conshohocken.
  2. ASTM G 90. 2005. Standard practice for performing accelerated outdoor weathering of nonmetallic materials using concentrated natural sunlight. American Society for Testing and Materials (ASTM), West Conshohocken.
  3. Forest Products Laboratory. 2010. Wood handbook: Wood as an engineering material. USDA Forest Service, Madison, Wisconsin.
  4. Han, Y.J., Lee, H.M., Eom, C.D. 2016. Physical and Mechanical Properties of Korean Red Pine Wood from Different Growth Sites and Correlations between Them. Journal of the Korean Wood Science and Technology 44(5): 695-704 https://doi.org/10.5658/WOOD.2016.44.5.695
  5. Jozsef, B., Benjamin, A.J. 1982. Mechanics of wood and wood composites. Van Nostrand Reinhold Company Inc CH 7.
  6. Jung, H.J., Song, Y.J., Lee, I.H., Hong, S.I. 2016. Lateral Load Performance Evaluation of Larch Glulam Portal Frames Using GFRP-Reinforced Laminated Plate and GFRP Rod. 2016. Journal of the Korean Wood Science and Technology 44(1): 30-39. https://doi.org/10.5658/WOOD.2016.44.1.30
  7. KS F 2150. 2014. Method of Static Bending Test for Full Sized Structural Lumber. Korean Standards Association, Seoul.
  8. KBC, A. 2009. Korean building code-structural. Seoul, Korea: Architectural Institute of Korea.
  9. McGreer, M. 2003. Weathering Testing Guidebook. Chicago, USA: Atlas Electric Devices Company.
  10. Kim, G.C., Kang, C.W., Matsumrura, J. 2011. A Study on the Bending Properties of Traditional Korean Joints. Journal of the Faculty of Agriculture, Kyushu University 56(2): 353-360. https://doi.org/10.5109/20331
  11. Kim, G.C. 2012. Study on the Change of Physical and Anatomical Properties in the Pine Wood by Accelerated Weathering Test. Korea Furniture Society 23(3): 324-331.
  12. Kim, G.C., Matsumura, J. 2013. Study on the change of bending performance for wood member by accelerated weathering test. Journal of the Faculty of Agriculture, Kyushu University 58(2): 351-357. https://doi.org/10.5109/27366
  13. Park, C.Y., Kim, G.C. 2014. Evaluation of Modulus of Elasticity of Wood Exposed to Accelerated Weathering Test by Measuring Ultrasonic Transmission Time. Journal of the Korean Wood Science and Technology 42(3): 275-281. https://doi.org/10.5658/WOOD.2014.42.3.275
  14. Park, Y.G., Han, Y.J., Park, J.H., Chung, H.W., Kim, H.B., Chang, Y.S., Yeo, H.M. 2018. Evaluation of Deterioration of Larix kaempferi Wood Heattreated by Superheated Steam through Field Decay Test for 12 Months. Journal of the Korean Wood Science and Technology 46(5): 497-510. https://doi.org/10.5658/WOOD.2018.46.5.497
  15. Kim, G.C., Park, C.Y. 2015a. Analysis of Surface Color Characteristics of Wood in Accelerated Weathering Test. Korea Furniture Society 26(3): 262-266.
  16. Kim, G.C., Park, C.Y. 2015b. Mechanical Properties of Zelkova Serrata Makino in Accelerated Weathering Test. Korea Furniture Society 26(4): 392-397.
  17. Kim, G.C., Kim, J.H. 2016. Performance comparison of Korean tongue and groove joint between handmade and pre-cut. Journal of the Korean Wood Science and Technology 44(5): 664-677. https://doi.org/10.5658/WOOD.2016.44.5.664
  18. Kim, G.C., Kim, J.H. 2019. The Measurement of Physical Properties of Outdoor Exposed Members. Journal of the Korean Wood Science and Technology 47(3): 311-323. https://doi.org/10.5658/WOOD.2019.47.3.311
  19. Sim, J.K., Kim, G.C. 2017. A Study on The Comparison of Mechanical Property Between The Staggered Stud Wood Wall and The Standard Wood Frame Wall. Journal of the Korean Wood Science and Technology 45(5): 640-649. https://doi.org/10.5658/WOOD.2017.45.5.640
  20. Yata, S. 2001. Occurrence of drying checks in softwood during outdoor exposure. In: Imamura Y (ed) Highperformance utilization of wood for outdoor uses. Wood Research Institute Kyoto University, Kyoto, pp. 65-70.
  21. Yu, S.G., Chang, S.J., Kang, Y.J., Kim, S.M. 2016. Comparison of Hygrothermal Performance between Wood and Concrete Wall Structures using Simulation Program. Journal of the Korean Wood Science and Technology 44(2): 283-293. https://doi.org/10.5658/WOOD.2016.44.2.283