Prediction of remaining service life for flexible pavement in the Southern Central States using FWD parameters

Nitish R Bastola, Mena I Souliman, S. Dessouky, Raja Daoud
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Abstract

Various Departments of Transportation (DOTs) in the South-Central States and abroad have extensively used Non-Destructive Testing (NDT) surface deflection bowl data. The primary purpose of using deflection-based NDTs in network-level assessment is to identify a section of pavement in need of further investigation at the project level. The falling weight deflectometer (FWD) test is a common NDT-based test that is used by transportation agencies to assess the performance of flexible pavement.This research concentrates on simulating the deflection produced by FWD devices using 3-D Move software. Simulations based on software will decrease the need for lengthy FWD testing in the field. In the study, ninety-seven (97) pavement sections from Arkansas, Louisiana, New Mexico, Oklahoma, and Texas are used for simulation, analysis, and verification of FWD testing. The deflection values produced from software simulations were found to be strongly correlated with field test findings. In addition, the simulated deflection values were used to develop and validate various deflection bowl parameters. In this study, the normalized comprehensive deflection ratio and the normalized comprehensive area ratio are two key characteristics that were validated and produced. Eventually, load-induced impacts using these parameters are effectively analyzed in order to anticipate the remaining service life of flexible pavement structures. The prediction of the remaining service life will be an efficient tool for different DOTs and transportation agencies to initiate the rehabilitation work in time and economically.
利用FWD参数预测中南部各州柔性路面剩余使用寿命
中南部各州和国外的各个交通部门(DOTs)广泛使用了无损检测(NDT)表面挠度碗数据。在网络级评估中使用基于挠度的ndt的主要目的是确定需要在项目级进一步调查的路段。下落重量偏转计(FWD)试验是一种常用的基于无损检测的试验方法,被运输部门用于评估柔性路面的性能。本研究主要是利用三维移动软件对FWD装置产生的挠度进行模拟。基于软件的模拟将减少在现场进行冗长的FWD测试的需要。在这项研究中,来自阿肯色州、路易斯安那州、新墨西哥州、俄克拉荷马州和德克萨斯州的97个路面路段被用于模拟、分析和验证FWD测试。软件模拟产生的挠度值与现场试验结果密切相关。此外,利用模拟的挠度值来制定和验证各种挠度碗参数。在本研究中,归一化综合挠度比和归一化综合面积比是验证和产生的两个关键特征。最后,利用这些参数有效地分析了荷载引起的冲击,以便预测柔性路面结构的剩余使用寿命。对剩余使用寿命的预测将是不同的DOTs和运输机构及时、经济地开展修复工作的有效工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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