scholarly journals Non-Destructive Evaluation of Asphalt Concrete Materials Performance During their Life Cycle Based on Accelerated Pavement Testing

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Michaela Ďurinová ◽  
Matúš Kozel
Keyword(s):  
Mechanical Properties ◽  
Life Cycle ◽  
Asphalt Concrete ◽  
National Standards ◽  
Traffic Load ◽  
Accelerated Pavement Testing ◽  
Climate Conditions ◽  
Concrete Materials ◽  
Pavement Testing ◽  
Non Destructive

Abstract The characteristics of asphalt concrete materials (ACM) composing the surfacing layer of a bituminous pavement must fulfil a requirement to maintain a level of operational capability demanded by national standards of a given country. ACM’s are a subject to significant stress caused by traffic load and climate conditions, this leads to changes in their physico-mechanical properties. The loss of physico-mechanical properties causes deterioration of road surface characteristics. Since these changes occur throughout the ACM’s life cycle, it is necessary to know the deterioration curves related to loading and time in mathematical terms, i.e. functions describing the initiation and progression of pavement’s defect in time. Pavement Performance Models (PPM) ascertained by non-destructive testing are used to objectively express the surface properties of pavements and their deterioration. The methodology consists of an analytical method to ascertain physico-mechanical characteristics of ACM’s and the use of experimental accelerated pavement testing (APT) facilities.

Performance of CAL/APT Drained and Undrained Pavements Under HVS Loading

1998 ◽  
Vol 1615 (1) ◽  
pp. 11-20 ◽  
Author(s):  
J. Harvey ◽  
L. Louw ◽  
I. Guada ◽  
D. Hung ◽  
C. Scheffy
Keyword(s):  
Asphalt Concrete ◽  
Design Method ◽  
Surface Profile ◽  
Design Procedure ◽  
Base Layer ◽  
California Department ◽  
Accelerated Pavement Testing ◽  
Pavement Testing ◽  
Fatigue Crack Development ◽  
And Performance

The Heavy Vehicle Simulator (HVS) test results of the first experiment of the California Department of Transportation (Caltrans) Accelerated Pavement Testing Program, known as CAL/APT, are presented. The Goal 1 experiment was designed to validate the existing Caltrans pavement thickness design method for drained (containing an asphalt treated permeable base layer) and undrained (containing aggregate base only) flexible pavements. The pavement performance results include fatigue crack development, surface profile, and vertical deflections. The observed performance of the two types of structures is compared. The effects of construction compaction of the asphalt concrete, bonding between asphalt concrete lifts, the relative performance of the drained and undrained structures under the controlled HVS environment, and comparison of the observed performance and performance expected by the thickness design procedure are presented and discussed.

Cyclic Elasto-viscoplastic Model for Asphalt Concrete Materials

2007 ◽  
Vol 8 (2) ◽  
pp. 239-255
Author(s):  
Dang-Truc Nguyen ◽  
Boumediene Nedjar ◽  
Philippe Philippe
Keyword(s):  
Asphalt Concrete ◽  
Viscoplastic Model ◽  
Concrete Materials

scholarly journals Nonlinear modelling of the seismic response of masonry structures: Calibration strategies

2021 ◽  
Author(s):  
Antonio Maria D’Altri ◽  
Francesco Cannizzaro ◽  
Massimo Petracca ◽  
Diego Alejandro Talledo
Keyword(s):  
Mechanical Properties ◽  
Numerical Models ◽  
Shear Stiffness ◽  
Model Material ◽  
National Standards ◽  
National Standard ◽  
Masonry Structures ◽  
Nonlinear Modelling ◽  
Various Boundary Conditions ◽  
Panel Stiffness

AbstractIn this paper, a simple and practitioners-friendly calibration strategy to consistently link target panel-scale mechanical properties (that can be found in national standards) to model material-scale mechanical properties is presented. Simple masonry panel geometries, with various boundary conditions, are utilized to test numerical models and calibrate their mechanical properties. The calibration is successfully conducted through five different numerical models (most of them available in commercial software packages) suitable for nonlinear modelling of masonry structures, using nonlinear static analyses. Firstly, the panel stiffness calibration is performed, focusing the attention to the shear stiffness. Secondly, the panel strength calibration is conducted for several axial load ratios by attempts using as reference the target panel strength deduced by well-known analytical strength criteria. The results in terms of panel strength for the five different models show that this calibration strategy appears effective in obtaining model properties coherent with Italian National Standard and Eurocode. Open issues remain for the calibration of the post-peak response of masonry panels, which still appears highly conventional in the standards.

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