Cylindrical coordinates The Software GAMES is compared with BISAR 11-2. Static Analysis The Software GAMES is compared with BISAR 11-1. In backcalculating layer moduli, the measure of how well the calculated deflection basin matches (or converges to) the measured deflection basin was previously described as the “error check.” This is also referred to as the “goodness of fit” or “convergence error.” The primary measure of convergence is typically Root Mean Square (RMS) or Root Mean Square Error (RMSE). Analysis and Backcalculation for Pavement Structures Kunihito MatsuiKunihito Matsui Tokyo Denki University 6th ICPT July 20-23 2008 Sapporo Japan No.1. Backcalculation Flowchart Measure of Convergence In some backcalculation programs, a range (minimum and maximum) of moduli are selected or calculated to prevent program convergence to unreasonable moduli levels (either high or low).įigure 1. It was developed by Pavia Systems, with generous sponsorship from the NAPA, the APA, and a consortium of state asphalt pavement associations. It includes feature enhancements to reflection cracking. It includes the new SJPCP/AC analysis module as well as an updated climatic data set. Various methods have been employed within the various backcalculation programs to converge on a set of layer moduli which produces an acceptable error between the measured and calculated deflection basins. The PAVEXpress Scoping Tool is a simplified pavement design tool to help engineers and pavement decision-makers analyze pavement structures and create technically sound structural designs. 0 Comments AASHTOWare Pavement ME Design. There are various error measures which can be used to make such comparisons (more on this in a subsequent paragraph in this section). PAVEST software to calculate the modulus and/or thickness of pavement layers by backcalculation analysis of pavement deflections measured by Falling Weight. This element simply compares the measured and calculated basins. Layered elastic computer programs are generally used to calculate a deflection basin. These moduli are usually estimated from user experience or various equations. The seed moduli are the initial moduli used in the computer program to calculate surface deflections. Includes all layer thicknesses and load levels for a specific test location. Includes the measured pavement surface deflections and associated distances from the load.