查詢結果分析
相關文獻
- Inverse Determination of Surface-Breaking Cracks in Concrete Using Transient Elastic Waves Part Ⅰ: Numerical Forward Simulation
- Inverse Determination of Surface-Breaking Cracks in Concrete Using Transient Elastic Waves Part Ⅱ: Experiment and Inversion
- Imaging of Concrete Defects Using Elastic Wave Tests
- 混凝土開裂原因及防止之探討
- 龜裂混凝土樑耐震韌性損失之研究
- 混凝土結構物裂縫修補:BICS灌注工法簡介
- 混凝土建築物裂縫成因探討
- 裂縫對鋼筋混凝土橋樑耐久性影響的評估方法
- 優生混凝土裂縫寬度與腐蝕行為之研究
- 混凝土裂縫之檢測
頁籤選單縮合
題 名 | Inverse Determination of Surface-Breaking Cracks in Concrete Using Transient Elastic Waves Part Ⅱ: Experiment and Inversion=以暫態彈性波反算混凝土表面裂縫(2):實驗與反算 |
---|---|
作 者 | 吳政忠; 方金壽; | 書刊名 | 中國土木水利工程學刊 |
卷 期 | 9:4 1997.12[民86.12] |
頁 次 | 頁637-645 |
分類號 | 440.327 |
關鍵詞 | 彈性波; 裂縫; 混凝土; 反算問題; Elastic wave; Crack; Concrete; Inverse problem; |
語 文 | 英文(English) |
中文摘要 | 本文第二部份介紹裂縫繞射波訊號的實驗量測及其在反算裂縫的應用。文中敘述以自行製作的錐形感測器量取彈性波的位移訊號,並提出一個校正感測器的方法來修正感測器在低頻訊號的失真。最後,結合第一部分所介紹的有限差分計算與實驗量測之繞射波訊號,將數值訊號與實驗訊號的比對工作引入至一個自動的最佳化過程,結果顯示此非線性反算法可精確地偵測出裂縫深度與其傾斜角度。 |
英文摘要 | In this paper, results of transient elastic wave experiments on concrete specimens with different crack geometry are presented. A homemade vertically polarized conical transducer was made for measuring the displacement signal of the elastic waves. To calibrate the transient elastic wave signals measured from the conical transducer, a calibration method is proposed and utilized to remove the low frequency signal distortion. On using the finite difference program developed in Part Ⅰand a nonlinear optimization algorithm, the geometry of a surface-breaking crack in concrete is determined inversely using the measured diffracted wave signal. The results show that the inverse method can accurately detect both the depth and inclined angle of an oblique surface-breaking crack. |
本系統中英文摘要資訊取自各篇刊載內容。