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首页> 外文会议>Conference on nondestructive evaluation of bridges and highways >Effect of induced deformation on NDT pavement evaluation
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Effect of induced deformation on NDT pavement evaluation

机译：诱导变形对NDT路面评价的影响

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Three nondestructive testing techniques were used in this study to evaluate pavement layer properties. These techniques included deflection and seismic methods. In the deflection methods, measurable surface deformations were induced using falling weight deflectometer and Dynaflect tests. These two tests utilized different schemes of dynamic loading applications to produce deflection basins from which the pavement layer properties were back calculated. Pavement properties from seismic methods were obtained from the analysis of surface waves due to transient load applications. In this study the seismic pavement analyzer (SPA) was used to determine pavement moduli values. Although the same assumptions for linear elastic behavior of pavement properties are usually assumed in all the three methods, obtained moduli values from these techniques did not conform to each other. Commonly, pavement deflection from SPA is not considered when analyzing layer properties. To narrow the gap between the obtained results, however, time-history records and frequency response functions were used to determine surface deflections from the three methods. Deflection measurements correlated with the obtained moduli values. Using these correlations, moduli values at any pavement deflection levels could be evaluated, especially at levels produced by traffic loads.
机译：本研究中使用了三种无损检测技术以评估路面层性质。这些技术包括偏转和地震方法。在偏转方法中，使用下降的重量偏转仪和DynaFlect试验诱导可测量的表面变形。这两个测试利用了不同的动态加载应用方案来产生偏转盆地，从中计算了后面的路面层性能。由于瞬态负载应用，从地震方法的路面特性获得了地震方法的分析。在这项研究中，地震路面分析仪（SPA）用于确定路面模量值。虽然通常在所有三种方法中假设路面特性的线性弹性行为的相同假设，但是从这些技术获得的Moduli值没有彼此符合。通常，在分析层性质时，不考虑从SPA的路面偏转。然而，为了缩小所获得的结果之间的间隙，使用时间历史记录和频率响应函数来确定来自三种方法的表面偏转。偏转测量与所获得的模倍值相关联。使用这些相关性，可以评估任何路面偏转级别的模制值，尤其是通过业务负载产生的级别。

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