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Non-destructive evaluation of the spatial variability of reinforced concrete structures

机译:钢筋混凝土结构空间变异性的无损评估

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摘要

Spatial variability of concrete is an important characteristic, which qualifies the non-homogeneity of concrete properties within structural components. Assessing it can be of great interest for damaged areas localization and for reliability analysis of structures. A two-stage experimental program was carried out using non-destructive testing (NDT) on laboratory concrete slabs in outdoor environment and on an existing bridge. The spatial variability was quantified at three scales: point (repeatability), local and global, for several NDT techniques (ultrasonic pulse velocity, electrical resistivity, radar and rebound hammer). The experimental results were analyzed using statistical and geostatistical tools.
机译:混凝土的空间变异性是一个重要的特征,它证明了结构构件中混凝土特性的非均质性。评估它对于受损区域的定位和结构的可靠性分析非常重要。使用无损检测(NDT)对室外环境中的实验室混凝土板和现有桥梁进行了两个阶段的实验程序。对几种无损检测技术(超声波脉冲速度,电阻率,雷达和回弹锤),按三个尺度量化了空间变异性:点(重复性),局部和全局。使用统计和地统计学工具分析了实验结果。

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