ABSTRACT

The utilization of reinforced pavements is largely empirical and supported by many experiences and practical applications, but there is still a knowledge gap in the modelling techniques. This paper introduces a 2D and 3D modelling approach used in order to predict and better understand the response of a steel reinforced pavement in presence of static and dynamic actions. This was done by using a widely spreads finite elements modelling (FE) software: ANSYS®. The models were developed by assuming a perfect elasto-plastic behaviour for the asphalt concrete and a linear-elastic behaviour for the steel reinforcement. The seismic actions were simulated by assuming the presence of a bedrock at a depth of 6 m from the embankment support plane applying a maximum project acceleration equal to 1 g. In particular, comparisons between the unreinforced and the steel reinforced pavement were previously performed by considering static and dynamic analysis for the 2D model. In this case, the reinforcement was placed at different pavement depths evaluating its most useful position. In order to validate the modelling approach, a 3D model has been also created. Harmonic analysis has allowed to analyze the frequency response and to identify the resonance frequencies. Static and dynamic analysis have been also performed showing the differences with the 2D model. Finally, the efficacy of the reinforcement was also valuated and confirmed in presence of pavement crack. The results showed in this paper allow to confirm the effectiveness of the steel mesh reinforce technology in different conditions (2D and 3D models, with and without cracks) providing useful instructions in their design and modelling techniques.