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3D-Move (NEW: Version 1.2) Now Available Online!
Error in creating the Load and Materials file
Very few users reported an error in creating the loading and materials data files. A warning was displayed while analyzing a problem in 3D-Move Analysis ver. 1.2: "Error in creating the output file. Check the materials and loading data."
Usually, the 3D-Move Analysis software creates many data files such as loading file, materials files, input files and output files. The program create and saves the “loading data” and “materials data” files in temporary files so that they will be called back later on for the calculation process of the pavement responses. It was found that the warning message was displayed due to following two reasons:
i. Error in creating the files in temporary directory in some computers.
ii. Though files were created in temporary directory, program could not access those files in some computers due to the long file name and long path name.
This bug has been fixed by assigning the appropriate file name and directory to the temporary files.
Error in creating the Master Curve
Another bug reported by some users is the error in developing a master curve. It was noticed that progress of master curve development was stopped at the 30% level when running the 3D-Move Analysis in a 64 bit Windows operating system.
This error was due to the 32 bit and 64 bit compatibility issues. Furthermore 3D-Move Analysis uses a 3rd party tool to develop the master curve. This tool is incorporated in 3D-Move analysis as a dynamic link library (DLL) file. Whenever E* master curve is to be developed, program itself will call this DLL file to develop the master curve. The DLL file was created in 32 bit environment. But 3D-Move Analysis ver. 1.2 was built to run as 32bit software in 32bit Windows operating system (OS) and 64bit software in 64bit Windows OS. That is why, when running the 3D-Move Analysis in 64bit Windows OS, program will not support to run 32 bit DLL. This bug has been fixed.
Announcement to 3D-Move Users (Posted on August 29, 2010):
Inconsistency Between Text and Excel Output Files of Ver. 1.1
The last beta-version of the 3D-Move Analysis (ver 1.1) was released on July, 2010. In 3D-Move, output is provided in formats: Text and Excel. An inconsistency has inadvertently occurred when these two formats were integrated. The inconsistency was present only in the Excel file, while the Text file output is correct. The origin of the slip-up was traced to the allocation of the columns when the data sharing between Text and Excel output files occurred. Further, there were concerns about the units of the 3D-Move responses being not prominently displayed. These issues have been corrected and a modified beta-version of 3D-Move (ver 1.2) is now available for download.
We have indicated before that as soon as any modifications are made to the program the registered users will be notified. Please make a note that to provide guidance and feedback to a user, an internet based forum “3D-Move Discussion Group” has been created. It can be accessed using the URL http://3d-move.finddiscussion.com/. A link to the discussion group site is included in the current 3D-Move version. This site is dedicated to collecting the feedback, comments, issues, and concerns etc. of individuals who are evaluating and/or using 3D-Move. There are two forums available at this site: 3D-Move Discussion and 3D-Move Newsletter. A note about the release of the 3D-Move (ver 1.2) has been included in the Newsletter forum. Users are requested to check the website periodically for updated versions and use the updates.
The original beta-version of the 3D-Move Analysis (ver 1.0) was released on June, 2010. We are continually undertaking product testing under variety of pavement loading and material conditions. Our investigation has revealed under certain pavement layer configurations and vehicle loading conditions (e.g., unrealistic thicknesses and vehicle speeds) can lead to numerical instability as a direct result of under or overflow of computer memory. Though almost all such cases are unrealistic, we have provided controls such that numerical instability is avoided.
In addition, we found that the time steps used in the computation of response histories for the cases of high vehicle speeds were not sufficiently low to capture the important peaks of the responses. Under high vehicle speeds the duration of the response histories are quite short and they require much lower time steps to reproduce the continuous time histories of any response.
A modified beta-version of 3D-Move that accounts for above (ver 1.1) is available for download.
We intend to upload to the website the modified versions of the software in a periodic manner. Users are requested to check the website periodically for updated versions and use the updates. We will also send e-mails to the registered users as newer versions are uploaded. Please make a note that to provide guidance and feedback to a user, an internet based forum “3D-Move Discussion Group” has been created. It can be accessed using the URL http://3d-move.finddiscussion.com/. A link to the discussion group site is included in the current 3D-Move version. This site is dedicated to collecting the feedback, comments, issues, and concerns etc. of individuals who are evaluating and/or using 3D-Move. There are two forums available at this site: "3D-Move Discussion" and "3D-Move Newsletter." The 3D-Move Discussion forum is dedicated for discussion on the features of 3D-Move and providing the solution and feedback to user's questions. Registered users can post questions in the 3D-Move Discussion forum and we will provide the users with answers. The discussions can go on between users and the software administrators and also between users. These discussions will be available at the site for viewing by all registered users. The other is Newsletter forum. This forum is dedicated to items such as notes on software updates, and also to significant newsworthy information relative to the use of 3D-Move.
About 3D-Move
The analytical model (3D-Move) adopted here to undertake the pavement response computations uses a continuum-based finite-layer approach. The 3D-Move model can account for important pavement response factors such as the moving traffic-induced complex 3D contact stress distributions (normal and shear) of any shape, vehicle speed, and viscoelastic material characterization for the pavement layers. The finite-layer approach adopted here treats each pavement layer as a continuum and uses the Fourier transform technique; therefore, it can handle complex surface loadings such as multiple loads and non-uniform tire pavement contact stress distribution. Since the tire imprint can be of any shape, this approach is suitable to analyze tire imprints, including those generated by wide-base tires (Siddharthan et al. 1998; 2000; 2002). The finite-layer method is much more computationally efficient than the moving load models based on the finite element method (Huhtala and Pihlajamaki 1992; Al-Qadi and Wang 2009). This is because often times the pavements are horizontally layered and pavement responses are required only at a few selected locations and for such problems the finite layer approach of 3D-Move is ideally suited. Since rate-dependant material properties (viscoelastic) can be accommodated by the approach, it is an ideal tool to model the behavior of asphalt concrete (AC) layer and also to study pavement response as a function of vehicle speed. Frequency-domain solutions are adopted in 3D-Move, which enables the direct use of the frequency sweep test data of HMA mixture in the analysis.
Many attempts that included field calibrations (e.g. Penn State University test track, Mn/Road and UNR Off-road Vehicle study) that compared a variety of independently-measured pavement responses (stresses, strains, and displacements) with those computed have been reported in the literature (Siddharthan et al. 2002, 2005). These verification studies have validated the applicability and versatility of the approach.
Download 3D-Move
Getting started with 3D-Move Analysis is simple on a Win32 operating system (Windows 7, Windows Vista or Windows XP) and it can readily run in that environment. Download
System Requirements
- Pentium IV or higher PC running at least 1500 MHz or higher is
recommended;
- Microsoft Windows XP, Windows Vista or Windows 7;
- Microsoft .NET Framework 3.5 (Download)
- At least 512 MB of Random Access Memory (1GB or more is recommended);
- 300 MB of free hard drive space;
References
Al-Qadi, I.L., and Wang, H., “Evaluation of Pavement Damage due top New Tire Designs,” Research Report ICT-09-048, Illinois Center for Transportation, IL., May 2009.
Huhtala, M. and Pihlajamaki, K. “New Concepts on Load Equivalency Measurements,” Proc. 7th Int. Conf. Asphalt Pavements, Nottingham, U.K., 1992, pp. 194-208.
Siddharthan, R.V., Yao, J., and Sebaaly, P.E., “Pavement Strain from Moving Dynamic 3-D Load Distribution,” Journal of Transportation Engrg., ASCE, Vol. 124(6), Nov./Dec. 1998, pp. 557-566.
Siddharthan, R.V., Krishnamenon, N., and Sebaaly, P.E., “Pavement Response Evaluation using Finite-Layer Approach,” Transportation Research Record No. 1709, TRB, 2000, pp. 43-49.
Siddharthan, R.V., Krishnamenon, N., El-Mously, M., and Sebaaly, P.E., “Investigation of Tire Contact Stress Distributions on Pavement Response,” Journal of Transportation Engineering, ASCE, Vol. 128(2), March/April, 2002, pp. 136-144.
Siddharthan, R.V., El-Mously, M., Krishnamenon, N., and Sebaaly, P.E., “Validation of a Pavement Response Model using Full-Scale Field Tests,” International Journal in Pavement Engineering, Vol. 3(2), 2002, pp. 85-93.
Siddharthan, R., Sebaaly, P.E., El-Desouky, M., Strand, D., and Huft, D. “Heavy Off-road Vehicle Tire-Pavement Interactions and Response,” Journal of Transportation Engineering, ASCE, Vol. 131(3), March/April 2005, pp. 239-247.
Pavement Analysis Using Nonlinear Damage Approach (PANDA)
PANDA can simulate the behavior of pavements and predict pavement performance, including fatigue damage, permanent deformation (better known as rutting) and overall life span. PANDA considers the impact of moisture intrusion, aging, healing and temperature on how the asphalt composite mixture responds under traffic. Users of PANDA can see graphically (from color contours representing levels and locations of damage in the pavement) how the pavement responds under regional environmental conditions. This approach allows the user to readily compare the utility of various material constituent combinations. Read More
