STUDY OF APPLICATION OF TRANSFER FUNCTION TO BEAMS OF BITUMINOUS MIXTURES

Abstract

Theoretical analysis of the stress-displacement behaviour of bituminous concrete and other bituminous mixtures and flexible pavement system as a whole are. very restricted in their applicability to represent actual field condition because of the complexity of the bituminous mixtures as a structural material and the complicated interactions with the other structural layers of the flexIble pavement A rigorous theoretical solution to a typical problem in pavement mechanics must satisfy the equation of equilibrium(or motion), compatibi-lity equation., boundary condition* and initial. condition. The development of such a solution requires the u, a of some form of stress-displacement-time relation for the materiels, At present, these are no satisfactory consti t ve relations available for pavement materials, both bituminous mixtures and soils, and, this is perhaps the greatest hortooming to realistic theoretical solution of the response of pavement systems to applied loads, dynamic or static. The study of visco--elastic characteristics of bituminous mixtures has been carried out by many research workers by hypothesizing sprig-dashpot models in various combinations to represent the behaviour of the material..........