Implementation of Darwin – ME
Chris Wagner, PE
July 26-29, 2010
Kansas City, MO
Does SHA Use or Plan to Use MEPDG?
N0 -12
YES - 40
Alaska
2007 Survey
Hawaii
Where are we now?
•
•
•
•
State implementation activities
Validation Activities
Status of DARWin ME
Planned Activites for DARWin ME
Software Capabilities-Import Raw Data
Climate: icm files
Traffic: AHTD Traffic Monitoring Data
5
Software Capabilities-Traffic Data Check
6
Software Capabilities-Materials E*
7
Software Capabilities- Retrieving Data
Very similar tools will be included in DARWin ME
8
Indiana DOT HMA Materials Characterization
Dynamic Modulus
• District - 6
• Nom Max Aggregate Size - 3
• Binder Type – 3
• Binder Characterization
• 3 Binders DSR data
• Traffic Data
• WIM Station Data Analyzed
• Load Spectra defined by Volume
What to Change for Design?
Sensitivity of Inputs for Concrete
Roughness
Faulting
Percent Slabs
Cracked
Permanent Curl/Warp Effective
Temperature Difference
VS
VS
VS
Joint Spacing
VS
VS
VS
Dowel Bar Diameter
MS
MS
NS
Pavement Thickness
S
MS
VS
Modulus of Rupture
S
NS
VS
Modulus of Elasticity
S
NS
VS
20-year/28-day Ratio
S
NS
VS
Parameter
Indiana DOT: MEPDG Guide for Designers
Good Calibration and Implementation Document
Montana DOT
http://www.mdt.mt.gov/research/projects/pave/pave_model.shtml
Major Findings:
• Preservation Practice Extend Performance
• Most models adequate for design
• Re-calibrate unbound materials rutting
11/9/2006
12/9/2006
1/8/2007
2/7/2007
3/9/2007
4/8/2007
5/8/2007
6/7/2007
7/7/2007
8/6/2007
9/5/2007
10/5/2007
11/4/2007
12/4/2007
1/3/2008
2/2/2008
3/3/2008
4/2/2008
5/2/2008
6/1/2008
7/1/2008
7/31/2008
Rut Depth, mm
Date
8.E+06
7.E+06
6.E+06
5.E+06
4.E+06
3.E+06
2.E+06
1.E+06
0.E+00
Continued MEPDG Validation
ESALs
at Auburn University
14.0
12.0
10.0
8.0
6.0
S11
MEPDG
4.0
2.0
0.0
Date
3/28/2009
40
12/18/2008
Measured
9/9/2008
30
6/1/2008
MEPDG
2/22/2008
35
11/14/2007
8/6/2007
4/28/2007
1/18/2007
10/10/2006
Bottom-Up Fatigue Cracking, % of Lane
S11– As Built – Fatigue Cracking
at Auburn University
25
20
15
10
5
0
Continued Validation
at Auburn University
What about Polymers?
Looking at Strains Directly
at Auburn University
Strain Response
100%
at Auburn University
90%
80%
Percentile
70%
Average
+15
-15
N3 2003
N4 2003
N3 2006
N4 2006
60%
50%
40%
Darwin-ME
output
30%
20%
10%
0%
0.0
100.0
200.0
300.0
Microstrain
400.0
500.0
DARWin ME Sneak Peek
DARWin ME — Improvements
Redesign GUI using .NET 3.5 framework in C#
• User configurable screens
• Agency defined data libraries
• Input control at the central office
• Expansion capabilities for new analysis engines
• Improved display on large or multiple monitors
• Improved error handling stability and error display
• Multiple project editing
• Handicap accessibility options
• Improved reporting (stability, speed and quality)
• Utilities for importing previous version files, third party data
• Multiple language extensibility
Enterprise Software
Material Property Inputs
Traffic
Error Checking
Multiple Project Edit
Batch Mode
XML File Formats
Integrated Reports
DARWin ME Development Status
Percent Complete,
Milestones
Date of Completion
Kick-Off
100%
User Requirements Spec & Review/Approval
100%
Preliminary Design Review
100%
System Requirement Spec & Review/Approval
100%
Requirements Tracebility Matrix
100%
Critical Design Review
100%
Implementation & Integration Process Audit
40%, 7/31/10
Test Readiness Review
80%, 6/15/10
Testing Process Audit
0%, 9/30/10
Software Alpha Test
0%, 8/15/10
Software Beta Test
0%, 10/15/10
Acceptance Test
0%, 11/30/10
Release
0%, 12/31/10
DARWin ME planned activities
•
•
•
•
•
Unveiling Session at 2011 TRB
Roll out webinar
FHWA web training 2011
FHWA On-site training
Traffic Workshops
Indiana DOT Experience
AASHTO 93
Thickness
Result
MEPDG Thickness
Result
I-465
16”-18’ PCCP
14”-18’ PCCP
$1,475,000
I-465 Ramps ( )
12.5”-18’ PCCP 11”-18’ PCCP
$112,000
I-465 Ramps (
40/Wash. St)
12.5”-18’-PCCP 12.5”-18’PCCP
I-80(mainline)
16”-18’-PCCP
14”-18’-PCCP
$361,000
I-80(Ramp)
12”-18’-PCCP
10.5”-18’-PCCP
$520,000
SR 14
15”-HMA
13.5”-HMA
$333,000
$155,440
US 231
11”-18-PCCP
10”-18’-PCCP
$333,000
$0
US 231-Ramp
10”-18’-PCCP
9.5”-18’-PCCP
$28,000
US 231
15.5”-HMA
13”-HMA
$557,000
$0
SR 62
16”-HMA
13”-HMA
$403,000
$420,548
US 231
11”-18’-PCCP
10”-18’-PCCP
$178,000
$0
Road
Estimated
Contract Saving
($)
Actual
Contract
Saving ($)
Total Savings
($)
$1,000,000
$0
$775,170
4,300,000
Evolution
The MEPDG is not perfect…..BUT;
The MEPDG provides a reasonable and structured platform for
continuous improvement.