The tool is capable of analyzing raw deflection data files obtained from Falling Weight Deflectometer (FWD) testing devices, backcalculating in-place elastic layer moduli for flexible and rigid pavements and generating inputs for performing rehabilitation design using Pavement ME. The Pavement ME Deflection Data Analysis and Backcalculation Tools is a standalone software program that can be used to generate backcalculation inputs to the AASHTO Pavement ME Design software for rehabilitation design. ME Design is a production-ready software tool to support the day-to-day pavement design functions of public and private pavement engineers.
Backcalculation software for pavement manual#
ME Design supports AASHTO"s Mechanistic-Empirical Pavement Design Guide, Interim Edition: A Manual of Practice. The results of the study suggest that the algorithm can be effectively incorporated into backcalculation software for multilayer flexible pavements.AASHTOWare Pavement ME Design 2013 v1.3.28ĪASHTOWare Pavement ME Design is a pavement design software, which builds upon the mechanistic-empirical pavement design guide, and expands and improves the features in the accompanying prototype computational software. 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. 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. The Pavement ME Deflection Data Analysis and Backcalculation Tools is a standalone software program that can be used to generate backcalculation inputs to. 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. 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 objective of this paper is to develop an innovative backcalculation method to calculate pavement layer moduli based on traffic speed deflectometer (TSD) measurements and analyze factors influencing backcalculation results. However, as the internally generated seed moduli do not always produce satisfactory results, the use of user-input seed moduli is generally encouraged. The measurement of pavement surface deflections under moving loads can be used for evaluation of pavement structural condition. Chapter 5 presents the chosen cross sections of the road for use in the backcalculation program, the results of the calculated deflection basin indices and of. Practically all backcalculation programs provide internally generated seed moduli for backcalculation analysis. Level 1 analysis, which is the most accurate approach, not only involves the backcalculation of FWD-tested deflections, but also requires measured data to satisfy Witczak’s predictive equation. 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. recommended in the Pavement ME Guide using AASHTOWare Pavement ME Design software. Evaluation of Layer Moduli and Overlay Design Mohamed Elshaer Cairo University ELMOD 1. Backcalculation Software ELMOD Analysis of flexible Pavement.
Backcalculation software for pavement pdf#
Full PDF Package Download Full PDF Package. Data tables that include backcalculation parameters were. Backcalculation Software ELMOD Analysis of flexible Pavement. The backcalculation analysis was conducted for all General Pavement Studies (GPS), Special Pavement Studies (SPS), and Seasonal Monitoring Program (SMP) test sections. Transportation Research Record (1905) : 117-127. Pre-processing and post-processing utility software were developed to facilitate data handling. Seed modulus generation algorithm for backcalculation of flexible pavement moduli. Seed modulus generation algorithm for backcalculation of flexible pavement moduliįwa, T.F.,Rani, T.S.
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