In this paper, a novel test method is proposed to measure the re-anchorage of a ruptured tendon in bonded post-tensioned concrete. Full-field measurements on post-tensioned concrete prisms (500 × 100 × 100 mm) allow a large number of parameters to be considered. The full-field displacement on the concrete surface after the rupture was recorded using 3D Electronic Speckle Pattern Interferometry (ESPI), which is an optical contactless technique. The results in the paper also demonstrate the power of the ESPI measurements, which allow many more measurements to be made (in this study 256 × 51 point measurements of displacement in concrete prisms) in comparison to conventional techniques such as DEMEC and electrical resistance strain gauges. The comparison of the proposed test method results to the 3D non-linear finite element model predictions shows the strength of the proposed test method for studying the re-anchorage phenomenon of ruptured tendons.

中文翻译：

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一种使用 ESPI 全场测量的粘合后张混凝土中筋再锚固的新测试方法

在本文中，提出了一种新的测试方法来测量粘合后张混凝土中断裂钢筋的再锚固。对后张混凝土棱柱 (500 × 100 × 100 mm) 进行全场测量允许考虑大量参数。使用 3D 电子散斑图案干涉仪 (ESPI) 记录破裂后混凝土表面的全场位移，这是一种光学非接触式技术。论文中的结果还证明了 ESPI 测量的强大功能，与 DEMEC 和电阻应变计等传统技术相比，它允许进行更多的测量（在本研究中对混凝土棱柱中的位移进行 256 × 51 点测量） .