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首页> 外文期刊>International Journal of Civil Engineering,Transaction A:Civil Engineering >Application of Falling Weight Deflectometer (FWD) Data and Energy Ratio (ER) Approach for Cracking Performance Evaluation of Asphalt Pavements
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Application of Falling Weight Deflectometer (FWD) Data and Energy Ratio (ER) Approach for Cracking Performance Evaluation of Asphalt Pavements

机译：落锤挠度计（FWD）数据和能量比（ER）方法在沥青路面抗裂性能评估中的应用

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摘要

This study primarily focuses on evaluating the falling weight deflectometer (FWD) time history data for use in relative cracking assessment of asphalt pavements. Eight field project sections with a similar pavement structure were selected for evaluation; they include sections with and without the evidence of cracks. FWD tests were conducted for all selected field sections at a similar temperature to obtain load-deflection time history data. The results of the FWD-dissipated energy were further compared with the results of the energy ratio (ER), which is a well-known performance-based fracture property previously introduced for the cracking performance evaluation of asphalt mixtures. Pavement structures with the existence of cracks showed significantly greater FWD-dissipated energy and maximum deflection indicating a relatively higher rate of deterioration and/or damage for the pavement systems. Additionally, a proportional relationship identified between rate of change in normalized ER and FWD-dissipated energy confirmed that the FWD time history data was able to effectively differentiate pavement structures with and without the existence of cracks. Comparative results between the FWD-dissipated energy and the ER further support the validity of application of FWD-dissipated energy and the maximum deflection as a reliable material and/or pavement structural response indicator that can be used for cracking performance evaluation of asphalt pavements.
机译：这项研究主要侧重于评估下降重量偏转仪（FWD）的时间历史数据，以用于沥青路面的相对开裂评估。选择了具有相似人行道结构的八个野外项目部分进行评估；它们包括有无裂纹迹象的部分。在相似的温度下对所有选定的现场部分进行了FWD测试，以获得载荷-挠度时间历史数据。将FWD耗散的能量的结果与能量比（ER）的结果进行了进一步比较，能量比是一种以前基于性能的基于断裂的特性，用于沥青混合料的裂化性能评估。具有裂缝存在的路面结构显示出明显更大的FWD耗散能量和最大挠度，表明路面系统的相对较高的劣化和/或损坏率。另外，确定的归一化ER的变化率与FWD耗散的能量之间的比例关系证实了FWD时程数据能够有效区分有无裂缝的路面结构。 FWD耗能和ER之间的比较结果进一步证明了FWD耗能和最大挠度作为可靠的材料和/或路面结构响应指标的应用的有效性，该指标可用于评估沥青路面的抗裂性能。

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