Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
권호 표지
DOI QR코드

DOI QR Code

Study of the Distribution Properties and LRFD Code Conversion in Japanese Larch

  • Received : 2010.02.08
  • Accepted : 2010.03.05
  • Published : 2010.03.25
Download PDF
⟨ Previous Next ⟩

Abstract

This study was performed to develop an LRFD (Load Resistance Factored Design) Code for Domestic Larch. To accomplish his, we evaluated bending, compression, tension and shear strength. The results of the strength evaluation were utilized to verify the distribution and code conversion. For bending, tension and compressive strength, the Weibull distribution was well-fitted, but for shear strength we observed a normal distribution. For evaluating the bending and compressive strength, a full-sized specimen was used. A small clear specimen was used to test tension and shear strength. Compressive strength in particular was found to be affected by tight knots, although there was little difference between grades. In the code conversion, the design value of the LRFD was larger than the existing allowable stress value in the Korean Building Code. However, the allowable stress in this study was about two times higher than the value listed in the Korean Building Code. This result induced the difference between the soft and hard conversions. For greater reliability, the accumulation of additional data is necessary and further studies should be performed

Keywords

References

  1. Standards Australia. 1997. Australian Standards, Timber Structures, Part 1 : Design methods.
  2. Canadian Wood CounciI. 1995. Wood design manual.
  3. Canadian Wood Council. 1999. Introduction to Wood design.
  4. Cornell. C. A. 1967. A Proposal for a Reliability-Based Code Suitable for Immediate Implementation. Memorandum to member of ASCE Task Committee on Structural Safety.
  5. Ellingwood. B., F. G. MacGregor, T. V. Galambos , and C. A. Cornell. 1982. Probability Based Load Criteria : Load Factor and Load ornbination, Journal of the Structural Division, ASCE. 108(st5): 978-997.
  6. Foschi R. O. 1985. Reliability of Wood Structural System, ASCE Journal of the Structural Engineering. 110(12) 2995-1556.
  7. Foschi, R. O., B, R. Folz ., and F. Z. Yao. 1987. Reliability-based design of wood tructures, Univ. of British Columbia.
  8. Foschi, R. O., H. G. L. Prion, B. Foil., and P. C. Timusk. 1996. Reliability based design of Glulam Beams, Proceeding of the international wood engineering conference (1): 125 - 130.
  9. Galambos. P, V. and B, Ellingwood. 1986. Serviceability Limit Statles : Deflection. ASCE, Journal of the Structural Engineering, 112(1): 67-84. https://doi.org/10.1061/(ASCE)0733-9445(1986)112:1(67)
  10. Hasofer, A. M. and N. C. Lind. 1974. Exact and Invariant Second-Moment Code Formal. Journal of the Engineering Mechanics Division, ASCE. 100(Em1): 111-121.
  11. Murphy, J. F. 1988. Load and resistance factor design for engineered wood construction. ASCE. 18(40): 58 - 81.
  12. Ratrick, R. J. and M. E. Criswell. 2000. Comparison of ASD and LRFD Codes for Wood Member, ASEC, Practice Periodical on Structural Design and Construction, vol. 5(2): 54 -69. https://doi.org/10.1061/(ASCE)1084-0680(2000)5:2(54)
  13. Park C.- Y., H.-K. Kim, and J.-J Lee. 2004. Study on Soft Conversion from ASD to RBD Code in Larch. Journal of the Korean Wood Science and Technology, 32(5): 45 - 50.

Cited by

  1. Bending Strength of Korean Softwood Species for 120×180 mm Structural Members vol.39, pp.5, 2011, https://doi.org/10.5658/WOOD.2011.39.5.444
  2. Evaluation of Allowable Bending Stress of Dimension Lumber; Confidence Levels and Size-adjustment vol.41, pp.5, 2013, https://doi.org/10.5658/WOOD.2013.41.5.432
  3. Review of Visual Grading and Allowable Stress Determination Methodologies for Domestic Softwood vol.43, pp.1, 2015, https://doi.org/10.5658/WOOD.2015.43.1.25
  4. Load sharing and weakest lamina effects on the compressive resistance of cross-laminated timber under in-plane loading vol.64, pp.5, 2018, https://doi.org/10.1007/s10086-018-1741-9