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.
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