- Reversed the heaviest axle weight change so that all pavements are evalutated using the heavy axle weights recorded on Weigh-in-Motion devices. This change is due to reports of frequent over-weight trucks on low-volume roads.
- Added standard deviation input to the R-Value design window.
- Fixed error in new rounding function.
- Fixed an error in the PDF Design Summary that sometimes reported incorrect thickness values.
- Re-ordered buttons on Control Panel (Traffic before Structure).
- Mohr-Coulomb analysis was modifed to evaluate the first granular layer at a constant depth of 6" or the bottom of the layer, whichever is less. The heaviest axle weights were also adjusted to legal loads for < 1,000,000 ESALs.
- Fixed a modulus error that occurred after R-Value was defined for undisturbed soil.
- Fixed an index error for St. Louis, Scott, Sherburne and Sibley Counties.
- Added models to adjust default layer thickness based on traffic.
- Added option to round HMA layer to nearest 0.5 in. following MnDOT rounding procedure.
- In Research Mode: Added Lukanen calculations for Select Granular Adjusted R-Value in the R-Value Design window and Effective Soil R-Value in Output.
- 2-layer HMA error in the R-Value module was corrected.
- LWD simulation was added in Research Mode (Advanced Structure window).
- New C & Phi values for below optimum moisture Fall, Winter, & Summer) for different base and subase materials were added. Class 5 values for above optimum moisture will continue to be used as a default until further test results can be obtained.
- In Research Mode, the user can now specify evaluation locations in each layer as a percentage of the layer thickness (1 to 100). The original Top-Middle_Bottom format is stll available.
- Life & Damage variables were adjusted to account for different models in Research mode while avoiding mean value errors from Reliability calculations.
- Enabled copy & paste in Info window.
- Fixed 2-HMA layer radio button in Basic Structure.
- Added Mn/DOT R-Value Design to MnPAVE.
- Simplified the Intermediate Structure window.
- Added CIR, Stabilized FDR & PCC layers with default properties.
- Added 12" fixed depth for rutting analysis (Research Mode).
- Added deflection difference between top & bottom of base (Research Mode).
- Added a PDF report generator to Output.
- Fixed Output report error that occurred after calculating Quick Reliability.
- Moved Load Spectrum Traffic to in Research Mode.
- Fixed MC damage index error in Output Research Mode (for custom models).
- Fixed Maximum Strain output in Batch Mode (Research Mode).
- Developed polymer shift factors for polymer-modified asphalts.
- Removed 58-28 binder warning.
- Fixed Spring2 & Summer modulus error for Other materials.
- An error that caused multiple lifts in the HMA edit window to be combined into a single lift was corrected.
- An error caused by material properties in unselected layers was corrected.
- Basic and Batch Mode data export errors were corrected.
- In Research Mode, an option to use mean thickness and modulus values (not adjusted for Confidence Level) was added.
- In Standard Mode the Confidence Level has a default value of 70%. Confidence Level can only be changed in Research Mode.
- A Monte Carlo data export error was corrected.
- Asphalt binder selections were updated to include the letter designations used in the Mn/DOT 2360 specification.
- Intermediate Structure was updated to allow changes to Poisson's Ratio.
- Corrected an error in the report printout that caused results based on a 50% confidence level rather than the confidence level selected by the user to be displayed after running a Monte Carlo simulation.
- Monte Carlo results are now saved with the MnPAVE file and printed in the report.
- The Confidence Level and Reliability topics in the Help files were updated with recommendations to use Monte Carlo simulation as a guide to designing structures with the desired level of reliability.
- Pore suction resistance factors were implemented in the seasonal multipliers for aggregate base, subbase, and subgrade soil materials. Custom resistance factors can now be entered in Intermediate Structure.
- The rutting coefficient KR1 was changed from 0.0199 to 0.0261 based on rutting data collected on County State Aid Highways (CSAH) in 2006.
- The fatigue and rutting models were validated using data from CSAH and Minnesota trunk highways.
- A new soil modulus model based on silt and clay content was implemented.
- A function that determines the triaxial textural soil classification based on silt and clay content was implemented.
- Two reliability methods were implemented:
a. Layer thickness and modulus adjustment: The values used to simulate the pavement are reduced according to the level of confidence (50-99%), the mean and coefficient of variation (COV) and distribution type.
b. Monte Carlo simulation: 2500 simulations are run using thickness and modulus values that are varied randomly within their respective distributions. The reliability is defined as the percentage of simulations that meet or exceed the design life.
- The Serialize function was edited to update the dynamic modulus coefficients saved in versions prior to 5.210.
- The pixel/latitude calculation in the Climate map was adjusted to minimize errors.
- The HMA dynamic modulus equation and the a0 coefficients were adjusted to calculate E* in psi rather than 10^5 psi.
- The printed summary in Output was modified to indicate the current version of MnPAVE.
- An error was corrected in th he time field in the FWD data window in Structure (Intermediate Overlay Design).
- A prototype "Soil Class" view was implemented in "Climate" This view is based on a the Minnesota Soil Atlas developed by the University of Minnesota Department of Soil, Water and Climate, and the Land Management Information Center.
- An error in the TONN calculation for mill and overlay designs was corrected.
- The function that estimates AADT from ESALs in the TONN overlay procedure was revised to include the new ESAL calculation.
- The ESAL calculation in Load Spectrum was revised to include steer axles, using the dual tire LEF.
- The option to simulate FWD deflections was added to Output...Batch Mode (Research Mode only).
- The overlay design procedure was updated according to the new MnDOT TONN procedure.
- The thickness warnings for HMA and aggregate base were expanded to comply with Mn/DOT's R-Value design chart.
- The Mohr-Coulomb analysis was modified to more accurately predict aggregate base stress failure under a thin HMA layer. Previous versions used maximum principal stress (sigma 1) as the criterion for selecting the worst loading condition because the critical stress (sigma C) changed very little under typical loading conditions. However, a heavy load on a thin HMA pavement can elevate the critical stress as well as sigma 1, making the difference between sigma 1 and sigma C a more accurate criterion.
- Basic load spectrum has been added, based on data from several Weigh-in-Motion around Minnesota. A load spectrum can be estimated by inputting AADT and selecting a route type.
- Structure dependency was removed from the MnPAVE fatigue transfer function.
- For Intermediate overlay design, the Allowable Spring Deflections used in the TONN method are read directly from the table rather than interpolated to keep the results consistent with the existing TONN method.
- Several improvements to the overall appearance of the program were made.
- A test version of the load spectrum calculator is operational in "Intermediate Spectrum". The user inputs AADT and vehicle type information, and MnPAVE calculates an estimated load spectrum using data from the weigh-in-motion device at Mn/ROAD.
- In Research Mode, an additional rutting model has been implemented. It is based on a rut depth model developed by H.B. Kim (Transportation Research Record 1730, pp. 99-109). This model applies only to ESAL traffic. The output appears at the bottom of the "Reliability" page.
- Quick reliability results are available in Research mode. This eliminates the need for lengthy Monte Carlo simulations for every design trial. Monte Carlo simulation should be run for verification on the final design.
- The "2 HMA Layers" default pavement selection now results in a single HMA layer with 2 lifts.
- Lock-up errors associated with multiple HMA layers have been corrected.
- In Structure, Intermediate test values can now be entered for undisturbed soil if there is no engineered soil. The resulting design moduli are half of the corresponding engineered soil moduli.
- The English unit for modulus values was changed from psi to ksi to reduce keystrokes.
- A few more changes in input format (kips instead of pounds to reduce keystrokes, etc.)
- Error in District 1 county selection was corrected.
- Research Mode errors in "View other output" and Monte Carlo reliability were corrected.
- Aggregate and soil tests selected in Intermediate Structure are displayed in Output.
- Traffic is entered in millions ("4200000" ESALs is now entered as "4.2" million ESALs).
- Expanded help file.
- A compatibility problem with Windows 95 was corrected.
Frans J. Van Cauwelaert
|Embedded Property Sheets||Eugene Kain|
|File Export Dialog (CFileExportDialog)||Anneke Sicherer-Roetman|
|Image Tool Tips||Paul DiLascia|
|MFC Grid Control (CGridCtrl)||Chris Maunder|
|Printing Class Library||Richard Stringer|
|Round to Decimal||Corey Spagnoli|