弹性波CT在混凝土缺陷检测中的试验研究
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摘要
通过对室内混凝土模型试件进行声波测试和CT成像,研究模型两侧测点数量逐渐减少的情况下生成CT成像图的差异性,并与试验模型进行对比分析。结果表明随着导入CT软件中的测点数量减少,CT成像图中缺陷的大小受到一定的影响,但缺陷位置和陷形状受的不变,进一步说明通过弹性波CT成像能直观地反映混凝土内部的质量分布,通过CT成像对混凝土内部缺陷的检测是可靠的。
The differences of CT images under each situation of the gradual decrease imported points,which were measured on both sides of the model,were studied and analyses with the tested model,through the experiments of acoustic test and CT imaging.The results showed that the size of defect in CT images had a certain influence by the number of imported points reduce.But the location and shape of defect had a consistent with the actual.It was further proved that elastic wave CT could visualize reflect the distribution of concrete,and defect detection of concrete through the CT imaging was reliable.
The differences of CT images under each situation of the gradual decrease imported points,which were measured on both sides of the model,were studied and analyses with the tested model,through the experiments of acoustic test and CT imaging.The results showed that the size of defect in CT images had a certain influence by the number of imported points reduce.But the location and shape of defect had a consistent with the actual.It was further proved that elastic wave CT could visualize reflect the distribution of concrete,and defect detection of concrete through the CT imaging was reliable.
引文
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[10]O.Martinez,Mostafa Akhnak,Luis G.Ullat,F.Montero DeEspinosa a small ZD ultrasonic array for NDT applications[J].NDT&E International,2003,(36):57-63
[2]吝曼卿,郭学彬,肖正学,等.弹性波CT在混凝土圆柱体冲击损伤实验中的应用[J].实验力学.2010,25(2):136-142.
[3]余志雄,薛贵玉,周洪波,等.大坝CT技术研究概况与进展[J].岩石力学与工程学报,2004,23(8):1394-1397.
[4]冷元宝,朱文仲,王运生.弹性波CT技术在小浪底主坝防渗墙质量检测中的应用研究[A].黄河物探技术应用与发展[C].郑州:黄河水利出版社,1996:490-496.
[5]朱文仲,赵志忠.弹性波CT技术几个重要问题的研究[J].工程地球物理学报.2008,2(5):173-180.
[6]潘伟,周黎明,阎贫.某面板堆石坝混凝土质量无损检测技术研究[J].混凝土,2004,(12):77-78.
[7]王殊,刘克中,鄢舒.一种多目标优化重建方法在气体浓厚层析成像中的应用[J].量子电子学报.2005,22(1):34-38.
[8]刘良琼,刘江平,张英德.井间地震射线走时层析成像数值模拟[J].工程地球物理学报,2004,1(5):44.
[9]Joseph Moysan,Gilles Comeloup,Thierry Sollier.Adapting anultrasonic image threshold method to eddy current images anddefining a validation domain of the thresholding method[J].NDT&E International,1999,(32):79-84.
[10]O.Martinez,Mostafa Akhnak,Luis G.Ullat,F.Montero DeEspinosa a small ZD ultrasonic array for NDT applications[J].NDT&E International,2003,(36):57-63
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