Backcalculation of flexible pavement moduli including interlayer bonding conditions – numerical analysis

Archives of civil engineering

article

Paweł Tutka¹  Roman Nagórski¹  Magdalena Złotowska¹ 

[1] Warsaw University of Technology, Faculty of Civil Engineering

关键词: road pavement mechanics;    flexible road pavement;    interlayer bonding modelling;    backcalculation;    non-destructive testing;    numerical modelling;   

DOI  :  10.24425/ace.2022.141870

学科分类：建筑学

来源: Polska Akademia Nauk * Instytut Podstawowych Problemow Techniki / Polish Academy of Sciences, Institute of Fundamental Technological Research

【 摘 要 】

One of the common defects of flexible road pavement is the loss of bonding between two layers of asphalt concrete: the base course and the binder course. The occurrence of this phenomenon has a major impact on the observed state of deflection and deformation of the pavement. This effect affects the results of non-destructive tests which are used to calculate material parameters and then are used in the diagnostics of the pavement condition or design of structural strengthening. This paper discusses the influence of the various level of bonding on the result of backcalculation and the obtained elastic moduli. For the obtained values of moduli, calculations of key deformations and pavement durability were performed. Improper assumptions about the interaction between the layers affects the observed results. Additionally paper discusses the effect of pavement displacement discontinuity on the observed deflection basin and compares the results with those for a model with continuity. Numerical calculations were carried out using Simulia Abaqus software, the computational model was verified using analytical solution.

【 授权许可】

Unknown