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Journal ArticleDOI: 10.1080/14680629.2019.1614970

Effect of vehicle speed and overload on dynamic response of semi-rigid base asphalt pavement

04 Mar 2021-Road Materials and Pavement Design (Informa UK Limited)-Vol. 22, Iss: 3, pp 572-602
Abstract: Premature deterioration in semi-rigid base asphalt pavement is still considered as one of the main distress related to Chinese highway pavements. There are several reasons for this premature damage...

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19 results found

Journal ArticleDOI: 10.1016/J.CONBUILDMAT.2019.117406
Ogoubi Cyriaque Assogba1, Yiqiu Tan1, Xingye Zhou1, Xingye Zhou2  +2 moreInstitutions (2)
Abstract: The effectiveness of any pavement design based on the mechanistic procedure depends on the accuracy of the mechanical parameters used such as stresses and strains. Hence, an effective and realistic prediction of these parameters when traffic and environmental data are provided is a step towards the future design of more sustainable pavement structures. This study investigated the distribution of the mechanical parameters in three new semi-rigid pavement structures with typical functional and structural requirements, specially designed to withstand various distresses of semi-rigid pavements. The response of these pavements to the combined effect of the nonlinear thermal gradient and moving axle load was examined by means of an advanced 3D pavement FE modeling. The model integrated mechanical and thermophysical properties of each pavement material, studied the transient dynamic effect of wheels load, and employed transient heat transfer and implicit dynamic analysis. Field measurements of these experimental pavement structures at the RIOH-Track test site in Beijing, China, as well as relative climatic data were used to verify and validate the accuracy of the developed model. Comparison of the numerical and experimental results indicated that the developed model predicted accurately the characteristic non-linear distribution of temperature along with the pavement depth and the pavement response to the combined effect of the nonlinear temperature gradient and traffic load. The influence of three main factors affecting the distribution of the mechanical parameters, namely; the bonding conditions between the pavement’s layers, the vehicle speed and the axle load amplitude were evaluated. In addition, fatigue analysis of the asphalt layers and the semi-rigid layers was performed to evaluate the theoretical service life of each pavement structure. The findings of this study underscored that the non-linear temperature gradient, despite being often neglected in mechanistic modeling, is a key parameter for accurate prediction of the distribution of stresses and strains in pavement system. Moreover, the results indicate that the lowest traffic speed and the extra weight extension of the truck axle have an adverse effect on mechanical parameters. Furthermore, the improvement of contact conditions at the interface results in good performance. Overall, the conclusions obtained in this study provides a reference for the design of semi-rigid pavement structures.

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Topics: Axle load (53%)

16 Citations

Journal ArticleDOI: 10.1061/(ASCE)GM.1943-5622.0001616
Ogoubi Cyriaque Assogba1, Zhiqi Sun1, Yiqiu Tan1, Lushinga Nonde1  +1 moreInstitutions (1)
Abstract: Understanding the structural behavior of layered asphalt pavements subjected to dynamic moving wheel loads is a crucial requirement for the future design of more-durable pavement structures...

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Topics: Asphalt (52%)

6 Citations

Open accessJournal ArticleDOI: 10.1590/1679-78255710
Abstract: The performance of railroad structure has a tremendous influence on the safety and stable operation of high-speed trains. Strong vibrations and the degradation rate of the track are the main factors affecting the transport safety of a railroad built over a weak soil. Geogrid reinforced embankment supported by pile structure is a new efficient construction technique used to ensure the stability and enhance the performance of the railroad system; but only a few studies are oriented to its behavior under train operation. This paper investigates the dynamic response of geogrid reinforced embankment supported by cement fly-ash gravel pile structure during a high-speed train operation. The establishment of a realistic simulation model for railroad subjected to a moving train load, is an important first step towards the reliable design of geogrid reinforced embankment supported by pile structure. Thus, a 3D nonlinear FEM has been established to simulate the instrumented Harbin-Dalian railway test section. Each train carriage was modeled as a transient dynamic load through a user-defined Dload subroutine. The developed model was successfully validated by the dynamic response recorded from the field test section. The improvement of the railroad structure by the CFG piles and geogrids contributed significantly to the reduction of the vibration in the structure, which attenuates 1.2 times faster with the structure depth, even under overload conditions. Moreover, the phenomenon of resonance observed when the train reaches speeds of 100 and 260 km/h were annihilated. The analysis of the stress distribution within the embankment revealed that a dynamic arch is formed in the embankment at 2 m from the ground. The stress onto the pile was 16 times greater than that acted on the soil and the tensile stress developed in the geogrid was high at the piles edge below. In addition, the coupling effect of geogrid with various tensile strengths and the piles with different strength grades indicated that the combination of a high-strength pile and geogrid significantly reduces the displacement gap due to the variation of train speed. As a result, the vibrations of the track were almost constant during the train operation; thus, ensuring comfort to passengers and reducing the risk of derailment.

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Topics: Geogrid (59%), Dynamic load testing (58%), Pile (54%) ... read more

5 Citations

Journal ArticleDOI: 10.1007/S11771-021-4626-9
Qinxue Pan1, Ce-ce Zheng1, Song-tao Lü1, Guoping Qian1  +4 moreInstitutions (2)
Abstract: In order to reveal the changing law of the mechanical response of asphalt pavements under the action of vehicle load and provide references for the design of durable pavements, three typical asphalt pavement structures with flexible base (S1), combined base (S2), and semi-rigid base (S3) were selected to perform field strain tests under static and dynamic load using the fiber Bragg grating optical sensing technology. The changing characteristics of the strain field along the horizontal and depth directions of pavements were analyzed. The results indicate that the most unfavorable asphalt pavement layers were the upper-middle surface layer and the lower base layer. In addition, the most unfavorable loading positions on the surface layer and the base layer were the center of wheel load and the gap center between two wheels, respectively. The most unfavorable layer of the surface layers gradually moved from the lower layer to the upper layer with the increase of base layer modulus. The power function relationships between structural layer strain and vehicle speed were revealed. The semi-rigid base asphalt pavement was the most durable pavement type, since its strain value was lower compared to those of the other structures.

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2 Citations

Journal ArticleDOI: 10.1080/14680629.2021.1987304
Ogoubi Cyriaque Assogba1, Yiqiu Tan1, Wangxu Dong1, Wangxu Dong2  +2 moreInstitutions (2)
Abstract: Mechanistic-based pavement distress prediction models or transfer functions are often used to assess damage or predict the service life of the pavement structure. The reliability of pavement struct...

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1 Citations


36 results found

Open accessBook
01 Dec 1959-
Abstract: FUNDAMENTAL PRINCIPLES. Pavement Types, Wheel Loads, and Design Factors. Stresses in Flexible Pavements. Stresses in Rigid Pavements. Vehicle and Traffic Considerations. Climate, Environment. The Economic Factor, Design Strategies, Systems Analysis. PROPERTIES OF PAVEMENT COMPONENTS: MATERIALS CHARACTERIZATION. Soil Classification. Materials Characterization. Soil and Base Stabilization. Subgrades. Bases and Subbases. Bituminous Surfaces. Material Variability. DESIGN OF FLEXIBLE PAVEMENTS. Design of Flexible Airport Pavements. Design of Flexible Highway Pavements. DESIGN OF RIGID PAVEMENTS. Design of Rigid Airport Pavements. Design of Rigid Highway Pavements. PAVEMENT EVALUATION AND REHABILITATION. Pavement Distress. Condition Surveys. Strengthening Existing Pavements.

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Topics: Pavement engineering (70%), Wearing course (61%)

991 Citations

Journal ArticleDOI: 10.1061/(ASCE)0733-9399(2006)132:2(172)
Abstract: The objective of this study was to characterize hot-mix asphalt (HMA) viscoelastic properties at intermediate and high temperatures and to incorporate laboratory-determined parameters into a three-dimensional finite element (FE) model to accurately simulate pavement responses to vehicular loading at different temperatures and speeds. Results of the developed FE model were compared against field-measured pavement responses from the Virginia Smart Road. Results of this analysis indicated that the elastic theory grossly underpredicts pavement responses to vehicular loading at intermediate and high temperatures. In addition, the elastic FE model could not simulate permanent deformation or delayed recovery, a known characteristic of HMA materials. In contrast, results of the FE viscoelastic model were in better agreement with field measurements. In this case, the average error in the prediction was less than 15%. The FE model successfully simulated retardation of the response in the transverse direction and rapid relaxation of HMA in the longitudinal direction. Moreover, the developed model allowed predicting primary rutting damage at the surface and its partial recovery after load application.

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Topics: Viscoelasticity (50%)

172 Citations

Journal ArticleDOI: 10.1080/14680629.2006.9690059
Abstract: This paper gives a mathematical-based procedure in order to construct master-curves from complex-modulus measurements. The method is based on the Kramers-Kronig relations linking modulus and phase angle of a complex function. Three pure bitumens, one polymer-modified-binder and two mixtures are chosen to validate the possible use of this methodology and apply it. Assumptions which are needed to apply this procedure, are verified on complex-modulus data measured from these materials. Hence, master-curves can be built without introducing error from manual adjustement. The method seems to be suitable for binders and mixtures as soon as their behaviour is in agreement with the time-temperature equivalency principle. In conclusion, some interpretations of the WLF constants are given.

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136 Citations

Journal ArticleDOI: 10.1061/(ASCE)0899-1561(1999)11:1(76)
Abstract: Methods of interconversion between relaxation modulus and creep compliance for linear viscoelastic materials are discussed and illustrated using data from asphalt concrete Existing methods of approximate interconversion are reviewed and compared for their approximating schemes A new approximate interconversion scheme that uses the local log-log slope of the source function is introduced The new scheme is based on the concept of equivalent time determined by rescaling the physical time The rescaling factor, which can be interpreted as a shift factor on a logarithmic time axis, is dictated by the local slope of the source function on log-log scales The unknown target function at a given time is obtained by taking the reciprocal of the source function evaluated at an equivalent time Although the method is developed using a mathematical relationship based on the power-law representations of relaxation modulus and creep compliance, the method is not limited to material functions characterized by power-laws but can be applied to general, non-power-law material functions as long as the relevant material behaviors are broadband and smooth on logarithmic scales The new method renders good results especially when the log-log slope of the source function varies smoothly with logarithmic time

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Topics: Source function (54%), Relaxation (physics) (53%), Logarithmic scale (52%) ... read more

123 Citations