2824 グラウト未充填部検出に対するパルス電磁力音響法の実験とFEMによる検証(S37-1 非破壊評価とモニタリング(1),S37 非破壊評価とモニタリング)

抄録

In existing PC structure, sheath ducts which are not filled with grout partly or completely are founded. The part without grout becomes a factor which threatens safety o structure by promoting corrosion of steel in PC concrete. In this research, we apply the pulse electro-magnetic-force-acoustic method to detect un-grouting part and inspect the effectiveness of this method. In the experiment, there was a difference in waveforms of vibration on specimen surface between sheathes with grout and without grout. Vibration in the case of un-grouting could be simulated by finite element analysis.