鋼繊維補強モルタルの曲げ試験の数値シミュレーション

1.はじめに

2.SFRCの構成方程式

 2.1 コンプライアンス可変型構成方程式

 2.2 構成方程式中の常数の決定

 2・3 試験片寸法の考慮

 2.4 2次元モデル(ポアソン比と破壊限接近度)

3.2次元FEM

 3・1 FEMモデル

 3.2 計算結果

4.考察とまとめ

Appendix T 実験より求めた応力−歪曲線に計算結果を一致させる方法

Appendix U 計算途中で構成方程式の関数形が変わったときの処理方法

参考文献

キーワード:鋼繊維,曲げ試験,構成方程式,有限要素法,シミュレーション


Numerical Simulation of Bending Test of Steel-Fiber Reinforced Mortar

A non-linear rheological model which was proposed by the authors mainly for the behavior of a brittle material in compression is slightly modified and extended to tensile stress field. This constitutive equation can be applicable to the post-failure region/behavior of steel-fiber reinforced mortar in tensile stress field. The one-dimensional simulation results indicate that the stress decreases more rapidly in the post-failure region as length of a test piece increases.

The constitutive equation is implemented to a FEM program and 4-points bending test is simulated. Calculated results of ultimate strength, absorbed energy and load-deflection curve reasonably coincide with the experimental ones.

KEY WORDS: Steel Fiber, Bending Test, Constitutive Equation, FEM, Simulation