THE PROPOSAL OF THE MODEL FOR ESTIMATING THE FLEXURAL STRENGTH OF THE GLULAM BEAM AND VERIFICATION BY EXPERIMENTAL RESULTS

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  • MORI Takuro
    Dept. of Architecture, Graduate School of Engineering, Shinshu Univ.
  • ISODA Hiroshi
    Building Research Institute Ministry of Land, Infrastructure and Transport
  • SASAGAWA Akira
    Dept. of Architecture Faculty of Engineering, Shinshu Univ.

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Other Title
  • 破壊過程を再現した集成材の曲げ強度推定モデルの提案と実験による検証
  • ハカイ カテイ オ サイゲン シタ シュウセイザイ ノ マゲ キョウド スイテイ モデル ノ テイアン ト ジッケン ニ ヨル ケンショウ

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Abstract

A model for estimating flexural strength was proposed in this paper. The model traces destructive mechanisms conscientiously. Therefore it can be applied for the several kinds of glulams that consist of some dimensions, stress conditions and woods. The model means that a lamina of glulam is divided into minute elements in the direction of length and minute elements that have each strength according to knots, finger-joint or clear wood. The element disappears when the element reaches its strength against the applied load. The concentration of stress and progress of cracks can be traced by removing minute elements in this model. The maximum flexural strength of a glulam beam is calculated as the minimum moment among the sums of moments that all elements resist on the same dimension. For confirming agreement of this model, Monte Carlo simulations were carried out. The estimated values using this model agreed well with several experimental data.

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