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Journal of Wood Science

, Volume 64, Issue 5, pp 635–641 | Cite as

Estimation of the internal shear strength distribution of the element for laminated veneer lumber by nonlinear least-squares method

  • Makoto KosekiEmail author
  • Noboru Nakamura
  • Shinichiro Naoi
Original Article

Abstract

Until now we developed an estimation method for strength distributions of laminated veneer lumber (LVL) element by nonlinear least-squares method (NLM). Estimated strengths by this method were modulus of elasticity (MOE) and modulus of rupture (MOR) in the horizontal use direction and the vertical use direction, tensile strength and compression strength. But to use LVL for structural members, shear strength was also needed. Therefore, we tried to estimate the shear strength distribution of LVL element by NLM same as MOE and MOR in the horizontal use direction and the vertical use direction, the tensile strength of LVL and the compression strength of LVL in the previous reports. We conducted shear strength test for LVL and estimated element shear strength distribution by LVL strength data in the horizontal and vertical use direction. Next, we simulated LVL shear strength distribution using element shear strength distribution and compared with experimental ones in each use direction. They were overlapped in both use direction. Therefore, we could validate NLM for estimating element shear strength distribution.

Keywords

Laminated veneer lumber (LVL) Monte Carlo simulation Nonlinear least-squares method Element of LVL Shear strength distribution 

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Copyright information

© The Japan Wood Research Society 2018

Authors and Affiliations

  • Makoto Koseki
    • 1
    Email author
  • Noboru Nakamura
    • 2
  • Shinichiro Naoi
    • 3
  1. 1.Japan Plywood Inspection CorporationSaitamaJapan
  2. 2.Institute of Wood TechnologyAkita Prefectural UniversityNoshiroJapan
  3. 3.WOOD ONE CO., LTDHatsukaichiJapan

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