me design v2.2 training webinar (slides)
TRANSCRIPT
• This Webinar is being presented from a computer with a resolution of 1280 X 1024.
• Using a similar setting on your machine may improve your viewing experience.
WELCOME TO THE
WEBINAR
AASHTOWare: Pavement ME DesignFY15 Enhancements
Enhancements to AASHTOWare Pavement ME®
Design:Version 2.2
AASHTOWare: Pavement ME DesignFY15 Enhancements
Moderators:• Judith Corley-Lay; NCDOT and
Chairperson, AASHTOWare ME Design Task Force
• Vicki Schofield, AASHTO
Presenters:• Harold L. Von Quintus, P.E.,
ARA• Michael I. Darter, P.E., ARA
Presentation will be available for viewing on the ME-Design Resource website:
http://www.me-design.com
1. Judith Corley-Lay; NCDOT, Chairperson2. Vicki Schofield, AASHTO Project Manager3. John Donahue, Missouri DOT4. William Barstis, Mississippi DOT5. Jay Goldbaum, Colorado DOT6. Marta Juhasz, Alberta Transportation 7. Mehdi Parvini, California DOT8. Felix Doucet, TAC Liaison9. Gary Crawford/Tom Yu, FHWA Liaison
AASHTOWare: Pavement ME DesignFY15 Enhancements
Task Force Members:
Announcements:
1. 2nd Edition of the MEPDG Manual of Practice is now available through the AASHTO Bookstore.
2. Webinars are planned for software releases that include enhancements which impact the predicted distresses.
3. AASHTO is performing a Technical Audit of the software in FY16, which is schedule for completion in February 2016.
AASHTOWare: Pavement ME DesignFY15 Enhancements
Process for Revising the Software:
1. Suggested revisions are received from users and AASHTO members.
2. ME Design Task Force monitors on-going/completed NCHRP, FHWA, and pool fund projects applicable to the MEPDG.
3. ME Design Task Force members review and prioritize all potential suggested revisions and enhancements.
AASHTOWare: Pavement ME DesignFY15 Enhancements
Topics:1. Enhancements
What is the enhancement?• Explained through addendum
How to access/use the enhancement?
What is the impact on the predicted distress?
2. Uploading Old Project Files3. Questions and Answers
AASHTOWare: Pavement ME DesignFY15 Enhancements
Addendum are available through the ME-Design Resource Website for downloading the software:
http:www.me-design.com
AASHTOWare: Pavement ME DesignFY15 Enhancements
AASHTOWare: Pavement ME DesignFY15 Enhancements
Topics:1. Enhancements:
a) AC Layer Dependent Plastic Deformation Coefficients
b) New PCC Calibration Coefficientsc) New Normalized Axle Load Spectra Defaultsd) Rehabilitation Input Levels 1 & 2 for PCC Overlay
of Flexible Pavementse) Reflection Cracking Transfer Functions
2. Uploading Old Project Files3. Questions and Answers
Enhancement:
AC Layer Dependent Plastic Deformation Coefficients
AASHTOWare: Pavement ME DesignFY15 Enhancements
• Enhancement added in FY2014 and included in software release 2.1
• NCHRP Project 9-30A; Report #719• Addendum #FY15.2
AC Layer Dependent Plastic Deformation Coefficients
Version 1.1 and earlier versions: One set of plastic deformation coefficients assumed for all AC
layers, regardless of the properties.
Version 2.1 enhancement: Plastic deformation coefficients can be entered for each AC
layer (new and existing AC layers).
AASHTOWare: Pavement ME DesignFY15 Enhancements
AC Layer Dependent Plastic Deformation Coefficients
AASHTOWare: Pavement ME DesignFY15 Enhancements
AC Layer Properties
AASHTOWare: Pavement ME DesignFY15 Enhancements
AC Layer Dependent Plastic Deformation Coefficients
AC Layer Dependent Plastic Deformation Coefficients
AASHTOWare: Pavement ME DesignFY15 Enhancements
Project Calibration Coefficients
AASHTOWare: Pavement ME DesignFY15 Enhancements
Addendum #FY15.2:
Determining the plastic deformation coefficients
Plastic Deformation Coefficients
AC Layer Dependent Plastic Deformation Coefficients
AASHTOWare: Pavement ME DesignFY15 Enhancements
Coefficient GlobalMixture
Layer 1 Layer 2Kr1 -3.35 -2.25 -1.95Kr2 1.5605 1.5605 1.5605Kr3 0.4791 0.30 0.30
Layer dependent plastic deformation coefficients:
Minimal to moderate impact on rutting.
Enhancement:
New LTPP Normalized Axle Load Spectra Defaults
AASHTOWare: Pavement ME DesignFY15 Enhancements
• LTPP/FHWA Pool Fund Study• Olga Selezneva, Principal Investigator• Addendum #FY15.1
New LTPP NALS Defaults
Version 2.1 and earlier versions: One set of default NALS was included in software; developed
from NCHRP Project 1-37A. NCHRP 1-37A default NALS represents overall average from
WIM sites in all functional classes; questions were raised about its accuracy.
Version 2.2 enhancement: LTPP defined WIM sites as their “gold standard;” primarily
interstate WIM sites used to generate LTPP default NALS. 4 NALS added as default NALS in the software.
AASHTOWare: Pavement ME DesignFY15 Enhancements
New LTPP NALS Defaults
AASHTOWare: Pavement ME DesignFY15 Enhancements
How to retrieve the additional
LTPP NALS?LTPP NALS included under “Traffic” tab.
New LTPP NALS Defaults
AASHTOWare: Pavement ME DesignFY15 Enhancements
Addendum #FY15.1Four LTPP NALS:
1.Global 3. Typical2.Heavy 4. Light
New LTPP NALS Defaults
AASHTOWare: Pavement ME DesignFY15 Enhancements
How different are the
additional NALS?
Minor difference between typical and global LTPP
NALS.
New LTPP NALS Defaults
AASHTOWare: Pavement ME DesignFY15 Enhancements
What difference do the new NALS make in the flexible pavement distress predictions?
NCHRP 1-37A
LTPP Global
LTPP Heavy
LTPP Typical
LTPP Light
Biggest difference is for cracking.
New LTPP NALS Defaults
AASHTOWare: Pavement ME DesignFY15 Enhancements
What difference do the new NALS make in the rigid pavement distress predictions?
NCHRP 1-37A
LTPP Global
LTPP Heavy
LTPP Typical
LTPP Light
Biggest difference is for cracking.
New LTPP NALS Defaults
AASHTOWare: Pavement ME DesignFY15 Enhancements
NCHRP 1-37A default NALS and LTPP Heavy NALS result in about the same predicted distress.
Other LTPP NALS result in less distress.
New LTPP NALS Defaults
AASHTOWare: Pavement ME DesignFY15 Enhancements
Use of global NALS or agency local NALS:No impact on predicted distress.
Poll Questions #1, #2, and #3.
AASHTOWare: Pavement ME DesignFY15 Enhancements
Enhancement:
New PCC Calibration Coefficients
AASHTOWare: Pavement ME DesignFY15 Enhancements
• NCHRP 20-24, Task 325• Dr. Julie Vandenbossche, Principal
Investigator• Addendum #FY15.3
New PCC Calibration Coefficients
Version 2.1 and earlier versions: JPCP & CRCP calibration coefficients and standard deviation
equations were based on results from CTE test method that was found to be in error (over prediction of CTE about 0.8).
CTE method was revised and corrected (AASTHO 336). NCHRP 20-24, Task 325 evaluated and recommended a revised
set of calibration coefficients and standard deviation equations using the revised (correct) CTE test method.
AASHTOWare: Pavement ME DesignFY15 Enhancements
New PCC Calibration Coefficients
AASHTOWare: Pavement ME DesignFY15 Enhancements
Version 2.2 enhancement: New JPCP & CRCP global calibration coefficients and
standard deviation equations from Task 325 replaced the older set of values.
Now, a designer must enter the “correct” CTE values and use the new global calibration coefficients and standard deviations.
New PCC Calibration Coefficients
AASHTOWare: Pavement ME DesignFY15 Enhancements
Version 2.2 enhancement: States that have locally calibrated using the
“correct” CTE values should continue to use these local calibration coefficients and standard deviations (e.g., Arizona, Colorado, Georgia, Mississippi, Utah, Wyoming, etc.) and inputting the “correct” CTE values.
New JPCP Calibration Coefficients
AASHTOWare: Pavement ME DesignFY15 Enhancements
NCHRP 20-24, Task 325 Addendum #FY15.3
New CRCP Calibration Coefficients
AASHTOWare: Pavement ME DesignFY15 Enhancements
NCHRP 20-24, Task 325Addendum #FY15.3
Impact of New Global Calibration
AASHTOWare: Pavement ME DesignFY15 Enhancements
• Version 2.2 new global calibration for JPCP and CRCP should not result in significantly different designs on average since the same field sections with the same performance trends were used.
• Of course, some designs will be a little thicker and some thinner due to variations involved.
Enhancement:
Rehabilitation Input Levels 1 & 2 for PCC Overlays of Flexible Pavements
AASHTOWare: Pavement ME DesignFY15 Enhancements
Rehabilitation Input Levels 1 & 2 for PCC Overlays of Flexible Pavements
Version 2.1 and earlier versions: Only rehabilitation input level 3 could be used for PCC overlays
of flexible pavements, while rehabilitation input levels 1, 2, & 3 were used for AC overlays.
Version 2.2 enhancement: Rehabilitation input levels 1, 2, and 3 are applicable for both
PCC and AC overlays of flexible pavements. Level 1: Backcalculate HMA “Damaged” Modulus Level 2: Enter % Alligator Cracking (not patched) Level 3: Enter Ratting: “Good”, “Fair”, etc.
AASHTOWare: Pavement ME DesignFY15 Enhancements
Rehabilitation Input Levels 1 & 2 for PCC Overlays
AASHTOWare: Pavement ME DesignFY15 Enhancements
AC Layer Properties
Rehabilitation Input Levels 1 & 2 for PCC OverlaysNo addendum for this enhancement, because rehab
input levels 1 and 2 are the same as for AC pavements.
AASHTOWare: Pavement ME DesignFY15 Enhancements
Rehabilitation Input Level 1 for PCC Overlays
AASHTOWare: Pavement ME DesignFY15 Enhancements
Rehabilitation Input Level 1: HMA Modulus from backcalculation in cracked areas
Rehabilitation Input Levels 1 & 2 for PCC Overlays
AASHTOWare: Pavement ME DesignFY15 Enhancements
Use of rehab. input levels 1 & 2, in comparison to level 3 :No impact on bias of predicted PCC distress.
Enhancement:
Reflection Cracking Transfer Function from NCHRP 1-41
AASHTOWare: Pavement ME DesignFY15 Enhancements
• NCHRP Project 1-41• Dr. Robert L. Lytton, Principal Investigator• Addendum #FY15.4
Reflection Cracking Transfer Function from NCHRP Project 1-41
Version 2.1 and earlier versions: Prediction of reflection cracks was based on an empirical
regression equation and only applicable to load-related cracks.
Version 2.2 enhancement: Integrated the ME based fracture mechanics model in the
software for predicting reflection cracks. Applicable to load and non-load related cracks of flexible, semi-
rigid, intact PCC, and fractured PCC pavements.
AASHTOWare: Pavement ME DesignFY15 Enhancements
Reflection Cracking IntegrationBased on results and methodology developed from
NCHRP Project 1-41A special thank you to:
Bob Lytton and Sheng Hu (Texas Transportation Institute) provided a lot of information and explanation on the models/equations.
Halil Ceylan completed the neural networks; the final product was not possible without Halil’s effort and assistance.
AASHTOWare: Pavement ME DesignFY15 Enhancements
Reflection Cracking IntegrationDocuments: Addendum #FY15.4 Enhancement has a large impact on the total predicted cracking
for AC overlays and existing AC pavements.
AASHTOWare: Pavement ME DesignFY15 Enhancements
Reflection Cracking Integration
Expanded Pavement Design Types:i. Overlay Design with Seal
Coatsii. Overlay Design with
Interlayersiii. Overlay of Semi-Rigid
Pavements
AASHTOWare: Pavement ME DesignFY15 Enhancements
Reflection Cracking IntegrationPerformance Criteria:
AASHTOWare: Pavement ME DesignFY15 Enhancements
AC overlay of AC pavement
AC overlay & seal coat of AC pavement
AC overlay & interlayer of AC pavement
AC overlay of AC pavement
Reflection Cracking IntegrationPerformance Criteria:
AASHTOWare: Pavement ME DesignFY15 Enhancements
AC overlay of Intact JPCPAC overlay of Fractured JPCP AC overlay of CRCP
Reflection Cracking IntegrationPerformance Criteria:
AASHTOWare: Pavement ME DesignFY15 Enhancements
Semi-rigid pavement
AC overlay of semi-rigid pavement
Reflection Cracking Integration
AC over ACAC over Semi-Rigid
AASHTOWare: Pavement ME DesignFY15 Enhancements
Software now considers fatigue and transverse cracks separately.
Reflection Cracking IntegrationAC over Fractured JPCP
AASHTOWare: Pavement ME DesignFY15 Enhancements
Software now considers crack spacing in fractured slab and load transfer efficiency of cracks.
Reflection Cracking
Integration
Semi-Rigid Pavements:
AASHTOWare: Pavement ME DesignFY15 Enhancements
Reflection Cracking Integration
Sensitivity of load transfer efficiency or crack severity:
AASHTOWare: Pavement ME DesignFY15 Enhancements
Reflection Cracking Integration Example, Overlay of
Flexible Pavement
AASHTOWare: Pavement ME DesignFY15 Enhancements
Reflection Cracking Integration Example, Overlays of
Intact and Fractured JPCP
AASHTOWare: Pavement ME DesignFY15 Enhancements
Reflection Cracking Integration Example, New Semi-
Rigid Pavement
AASHTOWare: Pavement ME DesignFY15 Enhancements
Reflection Cracking IntegrationCalibration Coefficients, AC over
Flexible Pavements:
AASHTOWare: Pavement ME DesignFY15 Enhancements
Fatigue Cracks
Transverse Cracks
Reflection Cracking IntegrationCalibration Coefficients, AC
over JPCP:
AASHTOWare: Pavement ME DesignFY15 Enhancements
Transverse Cracks
Reflection Cracking IntegrationCalibration Coefficients, AC over
Fractured JPCP/CRCP:
AASHTOWare: Pavement ME DesignFY15 Enhancements
Transverse Cracks
Reflection Cracking Integration
Calibration Coefficients, AC over
Semi-Rigid Pavements:
AASHTOWare: Pavement ME DesignFY15 Enhancements
Reflection Cracking Integration
Calibration Coefficients, Semi-Rigid Pavements:
AASHTOWare: Pavement ME DesignFY15 Enhancements
Reflection Cracking Integration
Observation from calibration sites: Seal coats and interlayers do
not result in significant difference in reflection cracking from AC over AC.
Important to verify predictions using agency specific data.
AASHTOWare: Pavement ME DesignFY15 Enhancements
AASHTOWare: Pavement ME DesignFY15 Enhancements
Topics:1. Enhancements:2. Uploading Old Project Files3. Questions and Answers
Uploading Old Project Files
AASHTOWare: Pavement ME DesignFY15 Enhancements
When opening an old project file for: New design, there should be no differences. Rehabilitation, difference will be with:
Amount of fatigue and transverse cracks in the existing pavement.
Load transfer efficiency of cracks in the existing layer. Calibration factors.
Uploading Old Project Files
AASHTOWare: Pavement ME DesignFY15 Enhancements
• Open an old project in ME Design • Click the “+” sign next to “ME Design
Calibration Factors” node• For AC overlay projects, double click
“Rehabilitation Flexible” node• For New AC projects, double click “New
Flexible” node
Uploading Old Project Files
AASHTOWare: Pavement ME DesignFY15 Enhancements
Click “Update Open Projects” tab at the bottom of the window
Poll Questions #4 and #5.
AASHTOWare: Pavement ME DesignFY15 Enhancements
AASHTOWare: Pavement ME DesignFY15 Enhancements
QUESTION AND ANSWER SESSION
We welcome comments & suggestions for future webinars.
Thank you for Attending the Webinar!AASHTOWare Pavement ME-Design Contacts:
• Vicki Schofield, [email protected]: (202) 624-3640
• Judith Corley-Lay, [email protected]
ME Design Resource Websitehttp://www.me-design.com
AASHTOWare: Pavement ME DesignFY15 Enhancements
Help Desk, Customer Support: ARA Staff:
• Deepak Raghunathan, ARA Inc. [email protected]
Phone: (217) 356-4500• Biplab Bhattacharya, P.E.
Other ARA Staff:• Chad Becker
[email protected]• Harold Von Quintus, P.E.
[email protected]• Michael I. Darter, P.E.