It has been investigated the theoretical dynamic response of a bituminous pavement subject to dynamic loads with harmonic variation. The study, developed through a FEM mathematical model, has allowed to underline that the strain rate generally dependent, beyond that on the intensity of the load, on his frequency and on the bituminous concrete own damping. The bituminous concrete has been modelled like elastoplastic material. The results show that when the load frequency is close to the resonance frequencies, high stresses are induced. In these cases the internal damping of the bituminous concrete reduces the stress amplification. High stiff reinforcement can produce, in some cases, the same effect with higher reduction. Also cracks propagation in presence of stiff reinforcement has been investigated. A remarkable increase of load repetition has been obtained to have, for a reinforced paving, the same crack propagation. The analysis has been developed particularly with reference to the metallic reinforcement Road Mesh, manufactured and commercialized by Officine Maccaferri Spa.

Steel Reinforcement Influence on the Dynamic Behaviour of Bituminous Pavement

CONI, MAURO;
2000

Abstract

It has been investigated the theoretical dynamic response of a bituminous pavement subject to dynamic loads with harmonic variation. The study, developed through a FEM mathematical model, has allowed to underline that the strain rate generally dependent, beyond that on the intensity of the load, on his frequency and on the bituminous concrete own damping. The bituminous concrete has been modelled like elastoplastic material. The results show that when the load frequency is close to the resonance frequencies, high stresses are induced. In these cases the internal damping of the bituminous concrete reduces the stress amplification. High stiff reinforcement can produce, in some cases, the same effect with higher reduction. Also cracks propagation in presence of stiff reinforcement has been investigated. A remarkable increase of load repetition has been obtained to have, for a reinforced paving, the same crack propagation. The analysis has been developed particularly with reference to the metallic reinforcement Road Mesh, manufactured and commercialized by Officine Maccaferri Spa.
2-912143-14-4
STEEL REINFORCEMENT, BITUMINOUS PAVEMENT
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/198912
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