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Development of Windows-Based Version of the 3D-Move Analysis Software for Pavement Response Analysis
Civil and Environmental Engineering
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In this study, the computer model 3D-Move, which is a continuum finite-layer based approach used that has been available for pavement responses to constant moving surface loads, was developed as a windows-based application (3D-Move Analysis). Old version of 3D-Move (DOS based version) had many drawbacks such as: time consuming in creating a data file and lack of contact stress distribution databases and user-friendly selection of materials characterization. The modified version (3D-Move Analysis) is free of many of the drawbacks found in the old 3D-Move.This modified version was developed using Microsoft Visual Basic.NET 2008 and it has many features and more user friendly than old version of 3D-Move. Windows controls were used to input the required parameters in this modified version. The 3D-Move Analysis can handle SI and US units. It is capable of analyzing static and dynamic cases. The current version includes performance prediction models such as MEPDG and VESYS to quantify the pavement damage. As many as six options have been included to specify the tire contact stress distribution in the 3D-Move Analysis. In the Uniform contact stress distribution option, the loading data is created for specified loaded area shape (circle, ellipse or rectangle) with or without braking/rolling. Non-uniform contact stress distribution is another loading option and it uses VRSPTA and Kistler databases which contain varieties of loading data for six types of tires. Semi-Trailer Truck Including Vehicle Dynamics is also an option and it calculates the load distribution on various axles of the 18-wheel tractor-semitrailer during normal highway traffic and braking. Special Non-Highway Vehicles option includes end dump truck and forklift.Characterization of viscoelastic materials was enhanced by incorporating the master curves development method such as MEPDG model, AMPT model, Non-symmetrical Sigmoidal model (Richard's curve), Huet-Sayegh model and Witczak model. These options use laboratory dynamic modulus data and binder properties to compute the viscoelastic properties of materials as a function of frequency. In this version, a well-integrated user friendly graphical display that distinguishes between many different types of response points, including the pavement structure has been incorporated. Furthermore, this version is capable of creating the output in text, tabular (Excel) and graphical format.