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沥青路面材料参数反算中测量误差对确定材料参数的敏感性分析

Sensitivity Analysis of Determining the Material Parameters of an Asphalt Pavement to Measurement Errors in Backcalculations.

作者信息

Tutka Paweł, Nagórski Roman, Złotowska Magdalena, Rudnicki Marek

机构信息

Faculty of Civil Engineering, Warsaw University of Technology, 00-637 Warsaw, Poland.

出版信息

Materials (Basel). 2021 Feb 11;14(4):873. doi: 10.3390/ma14040873.

DOI:10.3390/ma14040873
PMID:33670387
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7917722/
Abstract

Nondestructive tests of road pavements are among the most widely used methods of pavement condition diagnostics. Deflections of road pavement under a known load are most commonly measured in such tests, e.g., with the use of falling weight deflectometer (FWD). Measured values allow to determine the material parameters of the road structure, corresponding to the obtained results, by means of backcalculations. Among the factors that impact on the quality of results is the accuracy of deflection measurement. Deflection basins with small differences of displacement values may correspond to significantly different combinations of material parameters. Taking advantage of them for mechanistic calculations of road pavement may eventually lead to incorrect estimation of the remaining fatigue life and then inadequate selection of pavement reinforcement. This study investigated the impact of measurement errors on the change of the obtained values of stiffness moduli of flexible road pavement layers. Additionally, the influence of obtained material parameters on the values of key pavement strain, and consequently on its design fatigue life was presented.

摘要

道路路面的无损检测是路面状况诊断中应用最为广泛的方法之一。在此类检测中，最常测量的是已知荷载作用下道路路面的弯沉，例如，使用落锤式弯沉仪（FWD）进行测量。通过反算，测量值可用于确定与所得结果相对应的道路结构材料参数。影响结果质量的因素之一是弯沉测量的精度。位移值差异较小的弯沉盆可能对应着截然不同的材料参数组合。将其用于道路路面的力学计算最终可能导致对剩余疲劳寿命的错误估计，进而导致路面加固选择不当。本研究调查了测量误差对柔性道路路面层刚度模量所得值变化的影响。此外，还阐述了所得材料参数对关键路面应变值的影响，进而对其设计疲劳寿命的影响。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5845/7917722/bc7b701cc0d5/materials-14-00873-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5845/7917722/325b298a3692/materials-14-00873-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5845/7917722/bc7b701cc0d5/materials-14-00873-g011.jpg

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引用本文的文献

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The Impact of Dynamic Effects on the Results of Non-Destructive Falling Weight Deflectometer Testing.动态效应 对 无损落锤式弯沉仪测试结果的影响
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