3616 コンクリートの動弾性係数試験における振動モード(S13-4 疲労特性と設計,S13 実用構造材料の疲労問題と健全性評価)

Abstract

The relationship between distribution of dynamic modulus of elasticity and frequencies of flexural vibration and longitudinal vibration in freezing and thawing concrete specimen were examined. We know experimentally that the dynamic modulus of elasticity obtained from the frequency of flexural vibration decreases rapidly more than that obtained from the frequency of longitudinal vibration. We assumed that this cause was non-uniform of dynamic modulus of elasticity. The relationship between the distribution of dynamic modulus of elasticity and the frequencies of those vibrations was obtained by finite element method. We proposed the method to determine the distribution of dynamic modulus of elasticity from the frequencies of flexural vibration and longitudinal vibration.