FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017...

39
Hydraulic Engineering U.S. Department of Transportation Federal Highway Administration Hydrology Drainage Culverts Bridges Coastal Scour FHWA’s Future Scour Design Approach presented at the Bridge Scour Technology Transfer Workshop in Dimondale, Michigan by Kornel Kerenyi

Transcript of FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017...

Page 1: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

FHWA’s Future Scour Design Approach

presented at the

Bridge Scour Technology Transfer Workshop

in

Dimondale, Michigan

by

Kornel Kerenyi

Page 2: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

2017Physical Modeling 40 %

Numerical Modeling 60 %

Hydraulics Lab Overview

Live Bed Bridge Scour Experiments

Robotic Arm Carriage System

Page 3: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Erosion Force

y

Concept of Hydraulic loading and Erosion force Decay Function2018

Physical Modeling 35 %

Numerical Modeling 65 %

Page 4: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Erosion Force

y

Concept of Hydraulic loading and Erosion force Decay Function2018

Physical Modeling 35 %

Numerical Modeling 65 %

Page 5: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Erosion Force

Concept of Hydraulic loading and Erosion force Decay Function2018

Physical Modeling 35 %

Numerical Modeling 65 %

Page 6: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Erosion Force

y

Concept of Hydraulic loading and Erosion force Decay Function2018

Physical Modeling 35 %

Numerical Modeling 65 %

Page 7: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

yEstimated ysLevel 1

Uncertainty

Factored Resistance

Nominal Resistance

True ys

ASSUMED UNIFORM SOIL

2018Physical Modeling 35 %

Numerical Modeling 65 %

Concept of Soil Erosion Resistance Level 1: Using current assumptions of uniform soil (e.g. D50)

Page 8: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

y

Estimated ysLevel 2

Uncertainty

Factored Resistance

Nominal Resistance

True ys

Boring Logs from Historical

Records

2018Physical Modeling 35 %

Numerical Modeling 65 %

Concept of Soil Erosion Resistance Level 2: Soil Erosion Resistance Data from Historical Records

Page 9: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

y

Estimated ys

Level 3Uncertainty

Factored Resistance

Nominal Resistance

True ys

Soil Erosion Resistance = f (PI,

Cu, …)

2018Physical Modeling 35 %

Numerical Modeling 65 %

Concept of Soil Erosion Resistance Level 3: Soil Erosion Resistance from Geotechnical Properties

Page 10: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

y

Estimated ys

Level 4Uncertainty

Factored Resistance

Nominal Resistance

True ys

Shelby Tube Sample for Lab Erosion

Testing

2018Physical Modeling 35 %

Numerical Modeling 65 %

Concept of Soil Erosion Resistance Level 4: Soil Erosion Resistance from Lab Erosion Testing

Page 11: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

y

Estimated ys

Level 5Uncertainty

Factored Resistance

Nominal Resistance

True ys

2018Physical Modeling 35 %

Numerical Modeling 65 %

Concept of Soil Erosion Resistance Level 5: Soil Erosion Resistance from In-situ Scour Testing

Devices

Page 12: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

2020Physical Modeling 30 %

Numerical Modeling 70 %

Hydraulics Lab Overview

Automation of Soil Erosion Resistance Experiments

Programmed Robotic Arms performing experiments

Page 13: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

2030Physical Modeling 20 %

Numerical Modeling 80 %

Potential Future Procedure for Determining Soil Erosion

Resistance

Page 14: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Hydraulic Loads

Page 15: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Example: Feather River Bridge, Sacramento, CA, Scour Study

MFS and CFD to Determine Shear Erosion Forces

Page 16: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

MFS and CFD to Determine Shear Erosion Forces (cont’d)

Page 17: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

5 ft

ys

5 ft

Digitized Scour Bathymetry

Page 18: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

8 ft

ys

8 ft

Digitized Scour Bathymetry (cont’d)

Page 19: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

9.5 ft

ys

9.5 ft

Digitized Scour Bathymetry (cont’d)

Page 20: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

11 ft

ys

11 ft

Digitized Scour Bathymetry (cont’d)

Page 21: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

CFD for Computing Decay of Shear Erosion Forces

Shear Stress21 Pa

21 Pa

Page 22: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Shear Stress

13 Pa

ys

5 ft

CFD for Computing Decay of Shear Erosion Forces (cont’d)

13 Pa

Page 23: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Shear Stressys

8 ft10 Pa

CFD for Computing Decay of Shear Erosion Forces (cont’d)

10 Pa

Page 24: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Shear Stressys

9.5 ft7 Pa

CFD for Computing Decay of Shear Erosion Forces (cont’d)

7 Pa

Page 25: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

6 Pa

Shear Stressys

6 Pa11 ft

CFD for Computing Decay of Shear Erosion Forces (cont’d)

Page 26: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Soil Erosion Resistance – Testing

• In-situ Scour Testing Device

Page 27: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Proposed Future Scour Depth Design Method

Page 28: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Proposed Future Scour Depth Design Method (cont’d)

0 Soil Resistance

y

Page 29: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

In Situ Scour Testing Device (ISTD)

Proposed Future Scour Depth Design Method (cont’d)

0 Soil Resistance

y

Page 30: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Proposed Future Scour Depth Design Method (cont’d)

0 Soil Resistance

y

In-situ Scour Testing Device Research

Page 31: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

In-situ Scour Testing Device Concept (cont’d)

A-AA

B

B-B

Page 32: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

In-situ Scour Testing Device Concept (cont’d)

A-AA

B

B-B

Page 33: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

In-situ Scour Testing Device Concept (cont’d)

A-AA

B-B

B

Page 34: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Page 35: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Page 36: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Soil Erosion Resistance - Testing

• Ex-situ Scour Testing Device

MAIN MENU

Page 37: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Page 38: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

0

50

100

150

200

250

300

0 1 2 3 4 5 6 7

Ero

sio

n R

ate

mm

/hr

Shear Stress t (Pa)

Erosion Rate Curve

Test Data

Curve Fit

tc

Erosion Rate Curve is used for determining the

Critical Soil Erosion Resistance (tc)

Page 39: FHWA’s Future Scour Design Approach · Combined slide Author: 14110 Created Date: 10/10/2017 10:07:38 AM ...

Hydraulic EngineeringU.S. Department of Transportation

Federal Highway Administration Hydrology Drainage Culverts Bridges CoastalScour

Thank You