Fatigue Investigation of the Interface Shear Performance in Asphalt Pavement

the degree of adherence between two bituminous layers can be assessed from shear tests carried out at constant displacement speed, which allow the shear strength and stiffness of the interface to be obtained, being usual to specify a minimum strength. But stronger bonds will be more stressed, which could negatively affect their fatigue behaviour. In this work, the shear fatigue behaviour of two interfaces of different stiffness has been analysed, based on a cyclic compression test, performed at controlled stress, using the test device B described in the NLT-382 standard, included in the draft of the European pre-norm prEN 12697-48. From these tests, fatigue laws for each type of interface have been obtained. These laws, combined with a calculation method developed by the authors, have made it possible to obtain the number of cycles that each interface would withstand, under certain load hypotheses.

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“…The researchers demonstrated the significant influence of the normal pressure on the fatigue strength of the interface. [30].…”

Section: State Of the Artmentioning

confidence: 99%

A new proposal to assess shear fatigue resistance of asphalt pavement interfaces

Recasens

Ortiz-Ripoll²,

Martínez

et al. 2021

Road Materials and Pavement Design

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“…Recently, at Sapienza University of Rome, [9,29], two dynamic devices were designed and developed. The first, the Sapienza Horizontal Shear Test Machine, is similar to the Leutner test [18]; it is able to dynamically apply a shear load of any waveform in presence of a constant normal load.…”

Section: Dynamic Shear Testingmentioning

confidence: 99%

Dynamic tests on bituminous layers interface

D’Andrea

Tozzo

2015

Mater Struct

Self Cite

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The most common test used to evaluate the interface bond strength of asphalt pavements is the guillotine direct shear test working in monotonic modality. Under this test configuration the specimen reaches failure in a mode very different from those activated in an actual pavement. In fact, the repetitive loading applied by vehicles is considerably lower than the interface resistance measured by a monotonic test. Moreover, the stress paths imposed to the specimen nowhere are experienced on field, in terms of ratio between shear and normal stresses and their variation during loading time. This study regards the dynamic performance of double-layered cylindrical specimens evaluated by a shear tester where the specimen is inclined so as to obtain contemporarily variations of the applied normal and shear stresses. Various inclinations are used to reproduce several combinations of these two stress components as they actually occur on field in those positions where the vehicle wheels generate a shear stress always in the same direction and proportional to the normal stress. As both normal and shear components influence the interface resistance to repetitive stress, a dynamic failure surface is assessed in the three-dimension space, with the two stress components as independent variables and the\ud number of cycles at failure as dependent variable

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“…He proposed aggregate supply-side as well as demand-side indicators, and combined them in statistical regression models [22]. In 2014, Kenetsu developed two models which simultaneously estimated the value of travel time and its reliability based on the route choice behavior of risk-averse driver [23]. In 2015, Chong et al presented a bilevel programming model based on the unblocked reliability of urban network [24].…”

Section: State Of the Artmentioning

confidence: 99%

Connectivity Reliability Analysis of Road Network of Multiple OD Pairs based on the Structural Reliability of Joint Failure Modes

ye¹,

jiang²

2016

JESTR

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In order to improve operational efficiency of traffic road, it is necessary to carry out the exploration on the reliability of road network. The connectivity reliability is the critical index to calculate the reliability of the road network. Based on the joint failure modes of fatigue cracking and permanent deformation, the connectivity reliability model of road network was established, which was further introduced into the reliability analysis of road network system. By considering the influences of different OD (Origin-Destination) pairs and their weighting coefficients on the system reliability, the reliability model of complex road network of multiple OD pairs was finally constructed. Furthermore, connectivity reliability of complex road network was calculated on the basis of the Monte Carlo method and the breadth-first search method. The influences of the different road elements and nodes on the system reliability were analyzed by the numerical examples. In addition, the influences of reinforcement and expansion of the road network on the system reliability were also evaluated. Results show that, although the presented models based on multiple OD pairs and its different weighing coefficients are closer to the actual road network system, it is safer to define the road network reliability by single OD pair. Moreover, the failure of the nodes, especially those adjacent to the starting node, causes more damages to the road network system than the road section does, which decrease the reliability of the road network system. The recovery of the road sections adjacent to the starting nodes can not only effectively improve the reliability of the system but also reduce economic costs.

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Fatigue Investigation of the Interface Shear Performance in Asphalt Pavement

Cited by 22 publications

References 14 publications

A new proposal to assess shear fatigue resistance of asphalt pavement interfaces

A new proposal to assess shear fatigue resistance of asphalt pavement interfaces

Dynamic tests on bituminous layers interface

Connectivity Reliability Analysis of Road Network of Multiple OD Pairs based on the Structural Reliability of Joint Failure Modes

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