Out-of-plane Shear Strength of CLT with Japanese Larch or Sakharin Fir I.

Ishihara Wataru, Takanashi Ryuya, Ohashi Yoshinori, Matsumoto Kazushige, Toda Masahiko, Uematsu Takeyoshi

doi:10.2488/jwrs.66.214

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Other Title

カラマツ及びトドマツCLTの面外せん断強度（第<b>1</b>報）
カラマツ及びトドマツCLTの面外せん断強度(第1報)荷重方式及びスパン条件がせん断強度に与える影響
カラマツオヨビトドマツ CLT ノメンハズセンダンキョウド(ダイ1ポウ)カジュウホウシキオヨビスパンジョウケンガセンダンキョウドニアタエルエイキョウ
Influence of loading methods and span conditions on shear strength
荷重方式及びスパン条件がせん断強度に与える影響

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Abstract

<p>The primary object of this study is to investigate the out-of-plane shear strength property of 5-layer 5-ply CLT (Cross-laminated timber) with Japanese larch (Larix kaempferi) or Sakharin fir (Abies sachalinensis). The secondary object is to determine how the shear strength changes as the shear span increases under different loading conditions. We carried out shear strength tests by two loading methods: a three-point bending test and an asymmetric four-point bending test. We prepared several shear span conditions for each method. Results from these tests are as follows: (1) for both test methods, the shear strength of CLT with Sakharin fir was approximately 30% lower than that of CLT with Japanese larch, (2) for the asymmetric four-point bending test, specimens showed shear fracture at all span conditions, but in the three-point bending test, several specimens of CLT with Japanese larch showed bending fracture at the maximum load, and (3) for both test methods, the shear strength decreased as shear span increased according to a power curve regression. In addition, the converged values are approximately equivalent to the rolling shear strength obtained by the compression method.</p>

Journal

Mokuzai Gakkaishi

Mokuzai Gakkaishi 66 (4), 214-224, 2020-10-25

The Japan Wood Research Society

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