FraMCoS 7 2010 Jeju, South Korea

FEM simulation of a highly accurate impact echo method of PC grout simulation using a time domain signal

The impact echo method suffers from unstable generation of elastic waves, and it is difficult to distinguish the signal to be measured because the reflected wave overlaps the vibrations of the strike surface. Our research is aimed to improve the…

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Year 2010
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Abstract

The impact echo method suffers from unstable generation of elastic waves, and it is difficult to distinguish the signal to be measured because the reflected wave overlaps the vibrations of the strike surface. Our research is aimed to improve the accuracy of this method. For this purpose, the impact points were ar- ranged in a line. By two-dimensional finite element simulation we investigated whether its application to PC grout evaluation was possible. As a result of grout evaluation of tendon ducts with depth of 275 mm and di- ameter of 38 mm, we confirmed that parts missing grout could be detected.