![]() Many backcalculation software programs use this general approach, matching measured deflections to deflections calculated with multilayer elastic theory. (13) Hou’s approach is to search for the set of layer modulus values that minimize the sum of the squared differences between the calculated and measured deflections. Hou developed one of the first solutions for backcalculation of elastic layer modulus values of more than two layers. Types of Backcalculation Methods There are many programs and methods that can be used to estimate the in-place elastic modulus values of pavement structural layers from deflection basins. (13) It describes how specific backcalculation packages were selected as candidates to determine the elastic layer modulus values for all test sections included in the LTPP program. Backcalculation Methodology and Packages This chapter summarizes the activities completed in phase I of this project. Long-Term Pavement Performance Program Determination of In-Place Elastic Layer Modulus: Backcalculation Methodology and Procedures Chapter 2. Modulus Backcalculation Software 3,8/5 8641 reviews
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