DIAGNOSIS METHOD FOR STRUCTURE

To provide a diagnosis method for a structure which can easily determine whether a structure such as a block fence includes a reinforcement material such as a reinforcing bar, and which is simple and low in cost.SOLUTION: A diagnosis method for a structure into which a reinforcement material is part...

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Bibliographische Detailangaben
Hauptverfasser: ISHIDA NOBORU, NAGAOKA YASUYUKI, MIWA HIDEO, TAKANABE MASANORI, MATSUBARA YOSHITOMO
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a diagnosis method for a structure which can easily determine whether a structure such as a block fence includes a reinforcement material such as a reinforcing bar, and which is simple and low in cost.SOLUTION: A diagnosis method for a structure into which a reinforcement material is partly embedded comprises: a step of arranging a sensor 2 in a structure 1; an elastic wave generation processing step of generating an elastic wave by applying vibration to the structure 1 or a foundation near the structure 1; a time axis waveform processing step of A/D-converting an analog signal of the elastic wave detected by the sensor 2 to a digital signal of the elastic wave; a frequency spectrum processing step of subjecting the digital signal of the elastic wave to Fourier transformation to acquire a frequency spectrum of the elastic wave; a waveform evaluation processing step of comparing the frequency spectrum of the elastic wave with a reference frequency spectrum of a normal elastic wave serving as preliminarily acquired criteria; and a construction evaluation processing step of comparing the frequency spectrum of the elastic wave acquired in the structure 1 with the reference frequency spectrum of the normal elastic wave, and implementing the construction evaluation of the structure.SELECTED DRAWING: Figure 4 【課題】ブロック塀等の構造物に鉄筋のような補強材が入っているか否かを容易に判断でき簡便で低コストの構造物の診断方法を提供する。【解決手段】補強材が部分的に埋め込まれて構成された構造物の診断方法において、構造物1にセンサ2を配置する工程と、構造物1又は構造物1の近傍の基礎に対して振動を加えて弾性波を発生させる弾性波発生処理工程と、センサ2により検出された弾性波のアナログ信号をA/D変換して弾性波のデジタル信号とする時間軸波形処理工程と、弾性波のデジタル信号を、フーリエ変換して弾性波の周波数スペクトルを取得する周波数スペクトル処理工程と、弾性波の周波数スペクトルと予め取得した基準となる正常な弾性波の参照周波数スペクトルとを比較する波形評価処理工程と、構造物1で取得した弾性波の周波数スペクトルと、正常な弾性波の参照周波数スペクトルとを比較して、構造物の施工評価を実行する施工評価処理工程と、を有する。【選択図】図4