Coupled hydro-mechanical wave propagation in road structures

Kettil, Per; Engström, Gustav; Wiberg, Nils‐Erik

doi:10.1016/j.compstruc.2005.02.012

Cited by 58 publications

(15 citation statements)

References 6 publications

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“…With regard to the effect of water saturation and void distribution in asphalt mixtures, most previous studies on asphalt mixtures consider water displacement in asphalt film and the interface adhesion failure between aggregate and asphalt [31][32]. Studies have rarely focused on the structure evolution induced by the design void distribution in asphalt mixtures and volume expansion of water in cold regions.…”

Section: Evaluation Of Design Air Voids and Water Saturation Effect Omentioning

confidence: 99%

Internal structure evolution of asphalt mixtures during freeze–thaw cycles

2015

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Section: Evaluation Of Design Air Voids and Water Saturation Effect Omentioning

confidence: 99%

Internal structure evolution of asphalt mixtures during freeze–thaw cycles

2015

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“…The discretized equations have been implemented into an in-house FE-program called 'Femfield' [11,12] written in Fortran90 [13]. An eight-node quadrilateral element is used with quadratic interpolation of displacement u, water velocity w and linear interpolation of the water pressure p. For the solution of the linear system of equations, the direct solver MA37 in the Harwell Subroutine Library (HSL) has been used [14].…”

Section: Program Implementationmentioning

confidence: 99%

Coupled simulation of wave propagation and water flow in soil induced by high‐speed trains

Kettil

Lenhof

Runesson

et al. 2007

Num Anal Meth Geomechanics

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SUMMARYThe purpose of this paper is to simulate the coupled dynamic deformation and water flow that occur in saturated soils when subjected to traffic loads, which is a problem with several practical applications. The wave propagation causes vibrations leading to discomfort for passengers and people in the surroundings and increase wear on both the vehicle and road structure. The water flow may cause internal erosion and material transport in the soil. Further, the increased pore water pressure could reduce the bearing capacity of embankments. The saturated soil is modelled as a water-saturated porous medium. The traffic is modelled as a number of moving wheel contact loads. Dynamic effects are accounted for, which lead to a coupled problem with solid displacements, water velocity and pressure as primary unknowns. A finite element program has been developed to perform simulations. The simulations clearly demonstrate the induced wave propagation and water flow in the soil. The simulation technique is applicable to railway as well as road traffic.

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“…After a large number of F-T cycles, the comprehensive stress exceeds the ultimate strength of asphalt mixture, which leads to cracks and other apparent distresses appear [12,13] . Moreover, if the pavement is in a moisture environment, hydrodynamic pressure and vacuum constriction will appear in the surface layer under repeatable vehicle loads [12][13][14] . This results in stripping aggravation and voids increase on the surface of asphalt concrete (AC), and accelerates the degradation of pavement load capacity.…”

Section: Introductionmentioning

confidence: 99%

Impact of freeze-thaw cycles on compressive characteristics of asphalt mixture in cold regions

et al. 2015

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Low average temperature, large temperature difference and continual freeze-thaw (F-T) cycles have significant impacts on mechanical property of asphalt pavement. F-T cycles test was applied to illustrate the mixtures' compressive characteristics. Exponential model was applied to analyze the variation of compressive characteristics with F-T cycles; Loss ratio model and Logistic model were used to present the deterioration trend with the increase of F-T cycles. ANOVA was applied to show the significant impact of F-T cycles and asphaltaggregate ratio. The experiment results show that the compressive strength and resilient modulus decline with increasing F-T cycles; the degradation is sharp during the initial F-T cycles, after 8 F-T cycles it turns to gentle. ANOVA results show that F-T cycles, and asphalt-aggregate ratio have significant influence on the compressive characteristics. Exponential model, Loss ratio model and Logistic model are significantly fitting the test data from statistics view. These models well reflect the compressive characteristics of asphalt mixture degradation trend with increasing F-T cycles.

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Coupled hydro-mechanical wave propagation in road structures

Cited by 58 publications

References 6 publications

Internal structure evolution of asphalt mixtures during freeze–thaw cycles

Internal structure evolution of asphalt mixtures during freeze–thaw cycles

Coupled simulation of wave propagation and water flow in soil induced by high‐speed trains

Impact of freeze-thaw cycles on compressive characteristics of asphalt mixture in cold regions

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