Repair evaluation of concrete cracks using surface and through-transmission wave measurements
Repair evaluation of concrete cracks using surface and through-transmission wave measurements
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DOI：
10.1016/j.cemconcomp.2007.05.001
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发表时间：
2007-10-01
影响因子：
10.5
通讯作者：
Shlotani, T.
中科院分区：
文献类型：
--
作者：
Aggells, D. G.;Shlotani, T.
表面开口裂缝是桥梁等大型土木结构的常见缺陷。它们允许水或其他介质渗透，导致比预期更早地失去耐久性。它们的修复可以通过注射环氧树脂材料来进行，这种材料可以密封裂缝边，防止任何侵蚀性物质进入，并恢复强度。为了评估浸渍前的裂纹参数并确定最终修复效果，采用了瑞利波和纵波相结合的方法。瑞利波显示了材料在靠近表面的浅层中的填充情况，而使用纵波穿透厚度的断层扫描可以获得有关结构内部区域的信息。不同频率的波传播色散特征被提出的层析成像所利用，表明更高的频率导致更准确的表征。(C) 2007 Elsevier Ltd.版权所有。
Surface opening cracks are common defects in large civil structures like bridges. They allow penetration of water or other agents that result in loss of durability earlier than expected. Their repair can be conducted by the injection of epoxy material that seals the crack sides keeping out any aggressive substances in addition to the recovery of strength. In order to evaluate crack parameters before impregnation as well as to determine the final repair effectiveness, a combination of Rayleigh and longitudinal waves is applied. Rayleigh waves demonstrate the filling condition of the material into the shallow layer near the surface while tomography using longitudinal waves through the thickness yields information about the area inside the structure. Wave propagation dispersion features are exploited by the proposed tomography at different frequencies, demonstrating that higher frequencies lead to more accurate characterization. (C) 2007 Elsevier Ltd. All rights reserved.