State of the practice in pavement structural design/analysis codes relevant to airfield pavement design

Heymsfield, Ernest; Tingle, Jeb S.

doi:10.1016/j.engfailanal.2019.06.029

Cited by 19 publications

(11 citation statements)

References 12 publications

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“…The airfield flexible pavement thickness was evaluated using PCASE 7.0 computer code for both untreated and polymer emulsion-treated subgrade soil. The PCASE computer code developed by U.S. Army Engineer Research and Development Center is used for the structural design and analysis of airfield and roadway pavements ( 41, 42 ). Moreover, two design approaches are available for flexible pavement design, that is, California bearing ratio (CBR) empirical design and layered elastic design (LED) approaches ( 41 ).…”

Section: Resultsmentioning

confidence: 99%

Resilient Characteristics of Polymer Emulsion-Treated Sandy Soil

Kumar

Puppala

Tingle

et al. 2022

Transportation Research Record: Journal of the Transportation R

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The current pavement design guidelines, for example, Mechanistic-Empirical Pavement Design Guide (MEPDG), heavily rely on the resilient moduli of pavement materials. Some locally available pavement materials may not meet the design requirements and often require the application of efficient stabilizers. Therefore, the characterization of natural and treated subgrade soils using resilient modulus is important for the design of durable flexible pavements. A research study was designed and conducted to investigate the effect of polymer emulsion treatment on the resilient characteristics of sandy soil, which is used in constructing highways and airport surfaces. A commercially available polymer emulsion was used to stabilize cohesionless soil, and an attempt was made to understand the influence of polymer emulsion dosage and curing time on the strength and resilient characteristics of treated soil mixtures. Several laboratory tests were conducted on mixtures prepared with different dosages and curing times to evaluate the improvement in unconfined compressive strength and resilient moduli properties of treated sandy soil. Multiple regression analyses were conducted on resilient moduli test results using two- and three-parameter models and identified the best model exhibiting a good fit with the experimental data. A case study was demonstrated using the resilient moduli of untreated and polymer emulsion-treated soil to determine the thickness of airfield pavement. Overall, the outcome of the study is expected to assist the state and federal agencies in stabilizing and using problematic sandy soils for constructing various pavement structures.

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Section: Resultsmentioning

confidence: 99%

Resilient Characteristics of Polymer Emulsion-Treated Sandy Soil

Kumar

Puppala

Tingle

et al. 2022

Transportation Research Record: Journal of the Transportation R

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“…Structures in the form of plates on an elastic foundation have found wide application as designs of rigid pavements. Rigid pavement [1][2][3][4][5][6] differ from flexible pavement [7][8][9][10] in existence of a concrete layer in a surface course. Such constructions perceive big loading.…”

Section: Introductionmentioning

confidence: 95%

Ways to Minimize Volume (Weight) and Increase the Bearing Capacity of Rigid Pavement

Kolesnikov¹,

Tolmacheva²

2019

Civ Eng J

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The objective of research is finding of a possibility economy of rigid pavement weight and volume of material. The subject of the research is a mathematical model of rigid pavement in the form of a multilayer structure on an elastic foundation. The method of a research consists in modeling the behavior of rigid pavement in the form of a set of equations. These equations reflect the change in the stress-strain state of such structures. The system of equations takes into account the geometric nonlinearity of the work of materials and makes it possible to investigate the influence of various parameters on the values of stresses and displacements. Critical force coefficient and stress of shells are calculated by Bubnov-Galerkin. The formation way of the elastic foundation allows modeling the spreading layers with various characteristics. Use of two-layer model allows considering of a surface course and base course of road pavement designing (for example concrete and crushed stone). The graphs show the patterns of change of the stress of rigid pavement when changing the characteristics. The form of rigid pavement allowing to maintain big loadings is exposed to improvement. Findings shows the possibility of optimizing the geometric parameters of the design and achieving the savings in weight and volume of the consumable material.

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“…On the other hand, the accuracy of FEM outputs is primarily determined by the mesh patterns. The iterative solution techniques improve the estimated solution's precision with each iteration, resulting in a close approximation to the accurate (precise) but unknown resolution [34]. The idea of the FEM divides structures into many small, interconnected subregions, which are very small with field distribution such as stress and displacement can then be approximated with various types of modelling functions.…”

Section: Concept Of Numerical Approach (Fem)mentioning

confidence: 99%

Roadway Pavement Design Methods, Structural Approaches and Relevant Computer Algorithms: A Critical Review

Mensahn¹,

Wada²,

Lugeiyamu³

2022

IJTET

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Transport and international agencies invest millions of dollars on road projects to support countries develop their infrastructure; therefore, it is important to ensure longer service life and value for money. The primary function of the pavement structure is to keep distresses, including fatigue cracking and permanent deformation, to an acceptable limit so that the pavement can withstand applied vehicle load and repetitions during the service duration. Furthermore, the layered structure of the pavement is intended to ensure that the vehicle contact pressure is distributed in such a way that critical responses at the bottom layer of the pavement are low enough to avoid severe damage. Two typical procedures associated with roadway pavement design are empirical-based and structural analysis methods. However, the empirical-based methods have significant shortcomings, as predicting the mode and extent of pavement performance becomes a major challenge. Alternatively, the structural analysis methods have advanced extensively with computers since they consider crucial factors such as traffic loads, material characteristics and environmental conditions. The imputation of these parameters into the computer algorithm contributes to a better understanding of the mechanical performance of constituent pavement material responses. The predicted responses enable highway engineers to select appropriate pavement compositions that will deteriorate at a satisfactory level during the time of service. The most common structural analysis approaches are analytical modelling and numerical simulation. On the other hand, differences in analysis results generation using these approaches have been a notable concern. This review article presents a synopsis of typical pavement design methods and the problem connected with them; structural approaches to identify factors influencing their accuracy. Furthermore, computer algorithms use due to their usefulness, and the assumptions of layered theories employed in pavement structural design are discussed to uncover potential drawbacks for future upgrades.

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State of the practice in pavement structural design/analysis codes relevant to airfield pavement design

Cited by 19 publications

References 12 publications

Resilient Characteristics of Polymer Emulsion-Treated Sandy Soil

Resilient Characteristics of Polymer Emulsion-Treated Sandy Soil

Ways to Minimize Volume (Weight) and Increase the Bearing Capacity of Rigid Pavement

Roadway Pavement Design Methods, Structural Approaches and Relevant Computer Algorithms: A Critical Review

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