Development of Adjustment Factors for MEPDG Pavement Responses Utilizing Finite-Element Analysis

Gungor, Osman Erman; Al‐Qadi, Imad L.; Gamez, Angeli; Hernandez, Jaime A.

doi:10.1061/jtepbs.0000040

Cited by 19 publications

(5 citation statements)

References 17 publications

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“…Considering both the crossbeam and the upright column are over-constrained in the actual experimental setup, to obtain a more accurate beam deformation model, four adjustment factors k 1,c , k 2,c , k 3,c , k 4,c can be introduced in the SBD model of the intermediate module [21], [28], [29]. The crossbeam with both ends being over-constrained can be simplified as fixed-fixed beam.…”

Section: A Sbd Modeling Of the Intermediate Modulementioning

confidence: 99%

Non-Geometric Error Compensation for Long-Stroke Cartesian Robot With Semi-Analytical Beam Deformation and Gaussian Process Regression Model

et al. 2021

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Till now, most calibration methods only compensate geometric error caused by inaccurate kinematic parameters, while the desired accuracy may still not be achieved when the robot is performing long-stroke, heavy-duty loading and unloading tasks. In this paper, a generalized semi-analytical beam deformation model is firstly proposed for the Cartesian robot to compensate the non-geometric error due to structural deformation under both distributed and concentrated loads. The adjustment factors are introduced in this model to deal with the over-constrained boundary conditions for both intermediate and side modules of the long-stroke Cartesian robot. This improves the fitness of the coming geometric error model, which assumes the beam to be rigid and straight. In addition, as the major error components which do not conform to the Gaussian distribution have been extracted in earlier steps, the Gaussian process regression model is imported to predict the residual error more accurately. In this way, comprehensive geometric and nongeometric error modeling and compensation procedures are formed for the multi-module, long-stroke Cartesian robot. Simulations and real-time experiments are conducted to validate the effectiveness of the proposed method.

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Section: A Sbd Modeling Of the Intermediate Modulementioning

confidence: 99%

Non-Geometric Error Compensation for Long-Stroke Cartesian Robot With Semi-Analytical Beam Deformation and Gaussian Process Regression Model

et al. 2021

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“…Although the MEPDG has a more theoretically grounded methodology for pavement analysis, as compared with traditional pavement design guides, it has several limitations and unrealistic simplifications that may result in inaccurate response predictions. These limitations and simplifications are mostly caused by the assumptions resulting from the use of multi-layered elastic theory ( 27 ). The FE model presented in this study can overcome these limitations by simulating tire–pavement interaction more realistically.…”

Section: Adjustment Factorsmentioning

confidence: 99%

“…A sample of AF2 is given for only two responses in Figure 4. Details about AF2 development and the results for all responses can be found in Gungor et al ( 27 ).…”

Section: Adjustment Factorsmentioning

confidence: 99%

Impact of Wide-Base Tires on Pavements: A National Study

Al‐Qadi

Hernandez

Gamez

et al. 2018

Transportation Research Record

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This paper summarizes a multi-year effort comparing the new-generation wide-base tires (NG-WBT) and dual-tire assembly from a holistic point of view. The tires were compared considering not only pavement damage but also environmental impact. Numerical modeling, prediction methods, experimental measurements, and life-cycle assessment were combined to provide recommendations about the use of NG-WBT. A finite element (FE) approach considering variables that are usually omitted in the conventional analysis of flexible pavement was used for modeling pavement structures combining layer thickness, material properties, tire load, tire-inflation pressure, and pavement type (interstate and low volume). A prediction tool, ICT-Wide, was developed based on an artificial neural network to obtain critical pavement responses in cases excluded from the FE analysis matrix. Based on the bottom-up fatigue cracking, permanent deformation, and international roughness index, the life-cycle energy consumption, cost, and green-house gas emissions were estimated. To make this research useful for state departments of transportation and practitioners, a modification to AASHTOware is proposed to account for NG-WBT. The revision is based on two adjustment factors, one accounting for the discrepancy between the AASHTOware approach and the FE model of this study, and the other addressing the impact of NG-WBT. Although greater pavement damage may result from NG-WBT, for the analyzed cases, the extra pavement damage may be outweighed by the environmental benefits when NG-WBT market penetration is considered.

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“…To address this issue, recent research studies mainly based on numerical simulation, have started to analyze the impact on pavement performance of the variation of specific variables representative of truck platoon configurations: distribution of the lateral wheel wander (Chen et al 2019(Chen et al , 2020Gungor et al 2020;Al-Qadi 2020b, 2020a;Marsac et al 2020;H. Noorvand, Karnati, and Underwood 2017;Rana and Hossain 2021;Song, Chen, and Ma 2021;Zhou et al 2019), inter-vehicle distances (Gungor et al 2017(Gungor et al , 2020Gungor and Al-Qadi 2020a) and traffic distribution scenarios (Hoque et al 2021;Rana and Hossain 2021). By using a mechanistic-empirical approach, some of those researchers determined the damage produced by platoons in terms of fatigue and accumulated deformation.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the response of an instrumented pavement section under individual and platoon truck loading

Leiva-Padilla

Blanc

Trichet

et al. 2022

International Journal of Pavement Engineering

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Trucks transiting in platoon configurations promise a reduction in traffic congestion, an improvement in road safety, as well as lower fuel consumption and greenhouse gases emissions. Considering that truck platoon configurations are new, it is necessary to describe the structural responses they can produce in the pavement. In this sense, the present study shows the results obtained from a fullscale experiment designed to evaluate the structural responses of a test track subjected to the passage of trucks under two configurations: individual and platoon. The experiment consisted of measuring the transversal and longitudinal strains produced at the level of the bituminous layers of the pavement structure when trucks under both test configurations are transiting at speeds of 40 km/h, 60 km/h, 70 km/h, and 80 km/h. In order to consider the weather influence, two test campaigns were performed, one during winter and the other in summer. The main conclusion of the study is that by managing inter-vehicle distances, truck speeds, wandering, time, and periods of circulation, it is possible to minimize the impact of truck platoon configurations on the pavement's structure performance.

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Development of Adjustment Factors for MEPDG Pavement Responses Utilizing Finite-Element Analysis

Cited by 19 publications

References 17 publications

Non-Geometric Error Compensation for Long-Stroke Cartesian Robot With Semi-Analytical Beam Deformation and Gaussian Process Regression Model

Non-Geometric Error Compensation for Long-Stroke Cartesian Robot With Semi-Analytical Beam Deformation and Gaussian Process Regression Model

Impact of Wide-Base Tires on Pavements: A National Study

Comparison of the response of an instrumented pavement section under individual and platoon truck loading

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