implementation grinding simulation in proval

Portorož, Slovenia

Implementation of a Grinding Simulation Tool in the Profile Viewing and Analysis (ProVAL) Software Tool

•George Chang, PhD, PEGeorge Chang, PhD, PE

•Transtec GroupTranstec Group

•Project ManagerProject Manager

•gkchang@theTranstecGroup.comgkchang@theTranstecGroup.com

T H ETRANSTEC GROUPTHE

Portorož, Slovenia

Presentation Outlines

o Smoothness vs. Rideo Hot Spot and Should-Grind

Locatoro Grinding Simulation in

ProVAL o Smoothness Assurance

Portorož, Slovenia

Rolling Straightedge

Portorož, Slovenia

Modern Profilograph

Portorož, Slovenia

Manual Trace Reduction

Portorož, Slovenia

Profilograph Responses

Portorož, Slovenia

Profilograph Response

0

0.5

1.0

1.5

2.0Gain

Wavelength (ft)1000100101

Portorož, Slovenia

Profilograph Output

Profilograph output can be used to:1. Estimate smoothness.2. Determine a grinding strategy.3. Help improve construction practice for smoothness.

Portorož, Slovenia

Profilograph Output

Portorož, Slovenia

Profilers

0

0.5

1.0

1.5

2.0Gain

Wavelength (ft)1000100101

Profilograph

Profiler

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International Roughness Index

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Smoothness Assurance ModuleIRI Sensitivity

1 10 100Wavelength (ft)

0

.5

1

1.5

2IRI Response

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Ohio Turnpike Third Lane

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Profiler Output

3 4 0 0 3 6 0 0 3 8 0 0 4 0 0 0 4 2 0 0 4 4 0 0 4 6 0 0D i s t a n c e ( f t )

- .6

E l e v a t io n ( in )

0

.6

Profiler output can be used to:1. Estimate ride quality.2. Determine a grinding strategy.3. Help improve construction practice for ride.

Portorož, Slovenia

Elevation Profile

1000 1100 1200 1300 1400 1500Distance (ft)

-.2

-.1

0

.1

.2Left E levation (in)

Portorož, Slovenia

IRI Filter Response

Distance (ft)1000 1100 1200 1300 1400 1500

-200

-100

0

100

200HRI Filter Output (in/m i)

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Rectified Response

1000 1100 1200 1300 1400 1500Distance (ft)

0

50

100

150

200Rectified Filter Output (in/mi)

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Fixed Interval Report Start(ft) End(ft) HRI(in/mi) 0 500 39.8 500 1000 29.7 1000 1500 42.0 1500 2000 40.1 2000 2500 36.2 2500 3000 41.6 3000 3500 48.5 3500 4000 51.0 4000 4500 44.0 4500 5000 45.5

Portorož, Slovenia

Continuous Roughness Report

0 1000 2000 3000 4000 5000Distance (ft)

20

30

40

50

60Roughness Profile (in/m i)

500-ft Baselength

Portorož, Slovenia

Job SummaryLow IRI High IRI Percentage (in/mi) (in/mi) 0 10 0.0 10 20 0.0 20 30 8.3 30 40 35.4 40 50 40.5 50 60 15.8 60 70 0.0 70 80 0.0 80 90 0.0 90 100 0.0

Portorož, Slovenia

Short Interval Report

3600 3800 4000 4200 4400 4600 4800 5000Distance (ft)

20

40

60

80

100R oughness Profile (in/m i)

100-foot B aselength

Portorož, Slovenia

Hot Spot Locations

Segment Start Segment End Peak HRI (ft) (ft) (in/mi) 3201 3274 64.6 3276 3280 60.3 3925 4123 76.5 4495 4583 85.9

Portorož, Slovenia

18-foot Grinder

Portorož, Slovenia

Grinding Simulation

3600 3800 4000 4200 4400 4600 4800 5000Distance (ft)

20

40

60

80

100Roughness Profile (in/m i)

100-foot Baselength

Portorož, Slovenia

Optimal Grinding Strategy

Grind Start Grind End HRI Change Max. Depth (ft) (ft) (in/mi) (in) 3945 3990 4.8 0.36 4058 4093 5.4 0.33 4473 4587 6.1 0.16

Portorož, Slovenia

Validation Report

3600 3800 4000 4200 4400 4600 4800 5000Distance (ft)

20

40

60

80

100Roughness Profile (in/mi)

100-foot Baselength

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What is ProVAL?

o ProVAL is an engineering software application that allows users to view and analyze pavement profiles in many different ways.

o ProVAL is a FHWA product with continuous improvements.

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Portorož, Slovenia

1.0

2.0

2.5

2001 2002 2003 2006 200720052004 2008

History of ProVAL Releases

2.6

2009

2.7

2.73

3.0*

Portorož, Slovenia

Smoothness Assurance Module (SAM)

• Uses Profilers rather than Profilographs

• Allows a choice of an index

• Makes continuous reporting possible

• Includes both short and long interval criteria

• Produces a grinding simulation

Portorož, Slovenia

25-foot Grinder

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Grinder Setup

Head Position = Lf / Wheel Base

Portorož, Slovenia

Grinder Setup

Portorož, Slovenia

Grinding Simulation Setup

Portorož, Slovenia

Portorož, Slovenia

Portorož, Slovenia

Acknowledgement

o US FHWA Sponsorshipo Co-authors:

• Steven M. Karamihas, University of Michigan, USA• Robert Otto Rasmussen, P.E., Ph.D., The Transtec Group,

Inc., USA• Mark Swanlund, P.E., US DOT Federal Highway

Administration, USA• Robert Orthmeyer, P.E., US DOT Federal Highway

Administration, USA

o US Profile Pooled Fund States

Portorož, Slovenia

ProVAL Website

Portorož, Slovenia39

www.RoadProfile.com