Simulation of Shakedown Behavior in Pavement’s Granular Layer

Ghadimi, Behzad; Nega, Ainalem; Nikraz, Hamid

doi:10.7763/ijet.2015.v7.791

Cited by 10 publications

(10 citation statements)

References 17 publications

(22 reference statements)

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“…This constitutive model is examined against the laboratory data that was done by Habiballah and Chazallon (2005). In addition, constitutive model is also compared to Chazallon et al (2009) and Ghadimi, Nega and Nikraz (2015) constitutive models. This step is conducted and authors allowed using their laboratory results to verify the performance of this constitutive model.…”

Section: D -Fe Modelling Of Flexible Pavement Layersmentioning

confidence: 99%

“…The realistic analysis of pavement performance requires an approach that recognized the incremental mode of failure of such structure when subjected to repeated moving loads (Ghadimi, Nega & Nikraz 2015), and that theory of structural shakedown provides such an approach (Sharp 1985). The shakedown concept has been used to describe the behaviour of conventional engineering structure under repeated cyclic loading (Werkmeister, Dawson & Wellner 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Another, 2D-FE simulation is conducted by Ling and Lin (2003) where the response of reinforced asphalt pavement concrete under plane strain model condition subjected to monotonic loading is investigated. The simulation is run through PLAXIS program and UGM elastoplastic behaviour is considered through Mohr-Coulomb Criterion (Ghadimi, Nega & Nikraz 2015) in order to obey the associated and non-associated flow rules. Saad, Mitri and Poorooshasb (2006) investigated the numerical simulation to evaluate the benefits of integrating a high modulus into the pavement foundation and/or design criteria.…”

Section: Introductionmentioning

confidence: 99%

“…Material elastoplastic behavior is considered through Drucker-Plager model and simulation is run by ADINA. Ghadimi, Nega and Nikraz (2015) integrated a simulation of shakedown behavior in pavement granular layer in new constitutive model based on Mohr-Coulomb Criterion in FEM simulation in ABAQUS that was initially the experimental for UGM shakedown presented by Chazallon et al (2009). In sufficient evidence is currently available to confirm the reliability of the proposed linkage between shakedown ranges defined via repeated load triaxial (RLT) test and in-situ performance of UGM.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Simulation of Shakedown Behavior for Flexible Pavement’s Unbound Granular Layer

Nega

Nikraz

Al-Qadi³

2015

Airfield and Highway Pavements 2015

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Full-depth asphalt concrete pavements are generally designed to control fatigue cracking and reduce potential rutting when subjected to repeated heavy traffic loads. A particular interesting question is whether a limit load exists below which excitation shakedown in the sense that the granular layer does not accumulate further deformation. Although pavement design guides give more weight to asphalt concrete layer failures, granular failure may not be ignored; especially for thin layers and/or heavy load. The behavior of granular layers used in base and, sub-base layers of flexible pavement is complicated due to its nonlinear elastoplastic response when subjected to dynamic traffic loading. The objective of this paper is to present a new simplified simulation model for the Shakedown behavior of granular layer in flexible pavement. This method is integrated with Mohr-Coulomb criterion, which is used and applied to simulate the response of unbound granular layers to dynamic loading in a numerical analysis. The results of analysis are then compared to simplify the results of modeling without considering shakedown effects and then, the conclusions are drawn.

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Section: D -Fe Modelling Of Flexible Pavement Layersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Simulation of Shakedown Behavior for Flexible Pavement’s Unbound Granular Layer

Nega

Nikraz

Al-Qadi³

2015

Airfield and Highway Pavements 2015

Self Cite

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“…The second one is based on a cyclic triaxial test. The laboratory tests conducted on the road layer material can lead to establishing the actual mechanical behaviour of soil under cyclic loading by simulating the insitu conditions (Habiballah, Chazallon 2005;Ghadimi et al 2015;Bassani et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Studies on Cyclic and Dynamic Loading on Cohesive Soil in Road Engineering

Sas

Głuchowski

Gabryś

et al. 2016

Proceedings of 13th Baltic Sea Geotechnical Conference

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Soil investigations concerning cyclic and dynamic loading differ from static analysis. The Problem with the abovementioned loads becomes more important, when cohesive soils are taken into consideration. There are plenty of scientific reports containing the analyses of non-cohesive soil behaviour, yet there is still a lack of similar studies on cohesive soils. Repeated loading and dynamic excitations differ between themselves and parameters which are used to describe those phenomena are not congruent. Road constructors seek new approaches to design methods, which would take into account more types dynamic and cyclic excitations. For a successful utilisation of these occurrences in designing codes, mechanical parameters, such as resilient modulus Mr, shear modulus G and Poisson ratio υ or dumping ratio D, need to be determined. The laboratory tests were conducted on sandy clays, which are a common soil in Poland, using specialized laboratory equipment, such as a resonant column and cyclic triaxial apparatus. The aim of the work presented in this paper was to measureand analyse the abovementioned mechanical characteristics. The paper ends with conclusions regarding the application of cyclic and dynamic loading characteristics in road design.

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New shakedown criterion and permanent deformation properties of unbound granular materials

2019

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Unbound granular material specifications for road pavements in Australia are primarily based on physical material specification rather than mechanical characterisation. This simplified approach does not reflect the actual material performance under repeated dynamic traffic loads. There is a little information available on the influence of the local crushed rock properties and compacted layer properties on permanent deformation (PD). This study aims to characterise the local unbound granular materials in Victoria according to their PD behaviour under repeated loads and to develop a suitable shakedown criterion that could describe the PD of the tested materials to simplify the flexible pavement design. Repeated-load triaxial tests were conducted over several samples with a range of moisture contents, gradations, densities, and stress conditions. The laboratory test results showed that PD behaviour was influenced by several factors. In addition, the tested subbase-specified unbound granular materials reflect high PD resistance that is almost equivalent to basequality unbound granular materials. This may indicate that current requirements for the subbase-quality unbound granular materials are over-prescribe. Moreover, as the existing shakedown criterion was not applicable for the multi-stage repeated-load triaxial test and the local tested materials, a new shakedown criterion and new boundaries are proposed based on the PD behaviour. In the proposed criterion, the shakedown ranges are identified based on the curve angle of the PD vs. logarithm of the number of loading cycles, and this new criterion was validated using several materials from existing literature. The local tested base and subbase materials can be assigned as Range A when PD \ 1%, Range B when 1% \ PD \ 3%, and Range C when PD [ 3%. The proposed criterion could provide a useful and quick approach to assess the PD of the unbound granular materials with both single and multistages of stresses.

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Simulation of Shakedown Behavior in Pavement’s Granular Layer

Cited by 10 publications

References 17 publications

Simulation of Shakedown Behavior for Flexible Pavement’s Unbound Granular Layer

Simulation of Shakedown Behavior for Flexible Pavement’s Unbound Granular Layer

Studies on Cyclic and Dynamic Loading on Cohesive Soil in Road Engineering

New shakedown criterion and permanent deformation properties of unbound granular materials

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