#Modulus 6 backcalculation software
The results of the study suggest that the algorithm can be effectively incorporated into backcalculation software for multilayer flexible pavements. The proposed seed modulus generation algorithm does not suffer from the location and pavement type transferability constraints of most regression-based seed modulus generation methods. In comparison, the corresponding improvements for the case of EVERCALC were less. Development of a Computer Program for Dynamic Backcalculation of. It was found that the proposed seed modulus generation algorithm led to enhanced program performance of MICHBACK with respect to convergence characteristics and the accuracies of the backcalculated solutions. A comparison was made of the backcalculation program performance and the computed moduli of solutions obtained from internally generated seed moduli and those obtained from seed moduli generated by the proposed algorithm. An evaluation analysis of the effectiveness of the proposed procedure is presented by the use of two types of backcalculation software, MICHBACK and EVERCALC, and is based on measured and computed data for flexible pavement segments from the Long-Term Pavement Performance project. The proposed algorithm does not require any subjective judgment by the user. Backcalculation of Dynamic Modulus from Falling Weight Deflectometer Data. Figure 6 shows a plot between the dynamic moduli backcalculated from the. With the aim of providing useful guidance in the choice of seed moduli, a seed modulus generation algorithm, 2L-BACK, for multilayer flexible pavements based on a closed-form modulus backcalculation solution for two-layer flexible pavement structures was developed. The surface layer modulus cal culated by ELMOD 6 for the four-layer m odel was high, ranging from 72 MPa to 34,319 MPa, with an average of 13,2 51 MPa (Table 5). Although the MEPDG could not endorse the resilient modulus as the primary means. Accordingly, the elastic moduli backcalculated by various backcalculation algorithms have been evaluated using the elastic moduli of cores of concrete pavement layers measured in the laboratory. However, as the internally generated seed moduli do not always produce satisfactory results, the use of user-input seed moduli is generally encouraged. Table A.6-Results of Temperature Computer Simulations for IE using using full. Practically all backcalculation programs provide internally generated seed moduli for backcalculation analysis. Elastostatic method of backcalculation layer elastic moduli of pavement. The seed moduli chosen for backcalculation analysis of multilayer flexible pavements can have significant impacts on the performance of backcalculation software and, sometimes, the final solutions of the backcalculated moduli. Seed Modulus Generation Algorithm for Backcalculation of Flexible Pavement Moduli