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首页> 外文期刊>Magazine of Concrete Research >Observation of flexural cracks in loaded concrete beams using MRI
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Observation of flexural cracks in loaded concrete beams using MRI

机译：MRI观察加载混凝土梁的挠曲裂缝

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摘要

This paper describes apparatus that enables loading of a concrete beam reinforced with aramid fibre-reinforced plastic (AFRP) inside the magnet of a magnetic resonance imaging (MRI) scanner, and the subsequent measurement in three dimensions of the propagation of fractures within the concrete. These are then correlated with the internal structure of the concrete which had been previously determined by scanning the beam soon after casting. The particular requirements of the test frame for use within the scanner and the methods used to satisfy them are described in detail, as is the test procedure. It is shown that the resultant images can be visualised either as two-dimensional (2-D) slices, or as 3-D data sets; the images can also be post-processed to highlight the particular feature of interest.
机译：本文介绍了一种设备，该设备能够在磁共振成像（MRI）扫描仪的磁体内部加载用芳族聚酰胺纤维增强塑料（AFRP）增强的混凝土梁，并随后测量裂缝在混凝土内部传播的三个维度。然后将它们与混凝土的内部结构相关联，而混凝土的内部结构先前是通过在浇铸后不久扫描光束来确定的。将详细描述扫描仪内使用的测试框架的特殊要求以及满足这些要求的方法，以及测试过程。结果表明，所得图像可以可视化为二维（2-D）切片或3-D数据集。图像也可以进行后处理以突出显示感兴趣的特定功能。

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