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首页> 外文期刊>NDT & E international >Performance assessment method for crack repair in concrete using PZT-based electromechanical impedance technique
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Performance assessment method for crack repair in concrete using PZT-based electromechanical impedance technique

机译：基于PZT的机电阻抗技术的混凝土裂纹修复性能评估方法

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摘要

Concrete cracks are considered as an important indicator for potential damage and durability and are generally monitored in structural maintenance. A typical repair method in practice for concrete cracks involving with durability issues is to use alternative materials to fill the cracks. As the recovery quality of the repair is difficult to determine, an effective assessment approach is necessary. The electromechanical impedance (EMI) technique is a widely favored method; however, the determination of the frequency range and corresponding damage indicator is a governing factor for practical applications. Furthermore, its application to the evaluation of the crack repair performance has not been reported in the literature to date. This study presents an applicability of the PZT-based EMI technique for the quality assessment of crack repair in concrete. To determine an optimal frequency range that strongly reflects the structural condition, the trends of four damage indicators are investigated with multiple damage severities in each sub-frequency range. Subsequently, the performance of the crack repair material is evaluated using the predefined optimal frequency range with the damage indicators. The proposed approach is shown to effectively assess the recovery quality of the crack repair material over time.
机译：混凝土裂缝被认为是潜在损坏和耐用性的重要指标，并且通常在结构维护中监测。一种典型的修复方法，用于涉及耐用性问题的混凝土裂缝是使用替代材料来填补裂缝。随着修复的恢复质量难以确定，有效的评估方法是必要的。机电阻抗（EMI）技术是一种广泛优点的方法;然而，频率范围和相应损坏指示器的确定是实际应用的控制因素。此外，迄今为止尚未在文献中报告其对评估裂缝修复性能的应用。本研究介绍了基于PZT的EMI技术的适用性，以便在混凝土中的裂纹修复质量评估。为了确定强烈反映结构条件的最佳频率范围，在每个子频率范围内对四个损坏指示器的趋势进行了研究。随后，使用预定义的最佳频率范围与损坏指示器评估裂纹修复材料的性能。所提出的方法显示出随着时间的推移有效地评估裂缝修复材料的恢复质量。

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