The method of maximum deflection (Ivanon) is based on the elastic problem setting in the lands given by Boussinesq. The verification criterion (project) is similar to the one on which the maximum deflection method is based. Generally, a method is a tool for calculating the maximum deflection subjected to a thin layer sheet (to which road pavement is approximated). It is based on the Lagrange equation solution for thin sheets. The general principle of the method is to measure the adequacy of road pavement in terms of the number of vehicles (standard axes from 82 kN) that a road pavement can withstand, maintaining the desired functionality, for a certain number of years (set as a project data and equal, in most cases, to the useful life of the road). The method is based on considerations resulting from experimental tests. With RPD you can perform the verification procedures by empirical methods (as proposed by AASHTO in the document GUIDE FOR DESIGN OF PAVEMENT STRUCTURES) or by rational methods.Īmong the rational methods, the highest deflection is implemented (Ivanov) and Westergaard’s, designed to calculate deflections on multi-layer pavements.ĪASHTO GUIDE FOR DESIGN OF PAVEMENT STRUCTURES RPD is a software that implements automatic procedures for pavements verification calculations. RPD (Road Pavement Design) – Software for verifying road flexible and semi-rigid pavements.
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