定在波の直交性を考慮した補強コンクリートパイルの微細多重クラックの高精度検出
2007 年 43 巻 9 号 p. 725-734
詳細
2007 年 43 巻 9 号 p. 725-734
When a heavy loading test is performed to a reinforced concrete pile, many small cracks are generated as the increasing load. However, effective methods detecting the cracks have not been developed until now, due to the large number of small cracks. The present paper thus proposes an effective non-destructive inspection system using an acceleration pickup. That is, by making use of the stationary waves of the elastic wave generated in the pile, the method detects the cracks with a high precision and a high reliability. In order to make use of the stationary waves much more effectively, the paper introduces a dynamic model of the stationary waves and applies maximum likelihood method.
