KY

Load Rating of Bridge Size Culverts

Department of Civil Engineering University of Kentucky Kentucky Transportation Center

by Abheetha Peiris, Issam Harik, & Others

7th KEC Bridge Seminar January 31st 2018

The Others2016-2017 Structures Group

Outline- Kentucky’s Culverts- RC Box Culverts- BRASS Program- Field Measurements- Conclusions- Acknowledgment

1241

29 25 10 10 6 2 20

200

400

600

800

1000

1200

1400

Box RC RC Arch Metal Arch Concrete Arch RC Slab Conspan Arch Masonary Arch Metal Tunnel

Num

ber

of S

truc

ture

s

Structure Type

RC Box Culverts

009B00069L091B00026N

RC Arch CulvertsMetal Arch Culverts

076B00068N

Concrete Arch Culverts

059B00034N

Outline- Kentucky’s Culverts

- RC Box Culverts- BRASS Program- Field Measurements- Conclusions- Acknowledgment

RC Box Culverts

009B00069L

117

164

139

427

183

5151

79

31

2

96

0

50

100

150

200

250

300

350

400

450

1910-1919 1920-1929 1930-1939 1940-1949 1950-1959 1960-1969 1970-1979 1980-1989 1990-1999 2000-2009 2010-2019 No Data

Num

ber

of C

ulve

rts

Design Year for RC Box Culverts

1241 Culverts

34%

162

846

223

8 1 0 10

100

200

300

400

500

600

700

800

900

1 2 3 4 5 6 7

Num

ber

of C

ulve

rts

Number of Cells

Number of Cells for RC Box Culverts

1241 Culverts

68%

65

1048

106

1 210

200

400

600

800

1000

1200

0'-9' 10'-19' 20'-30' 31'-35' No Data

Num

ber

of C

ulve

rts

Cell Clear Span Lentgh (ft)

Cell Clear Span for RC Box Culverts

1241 Culverts

84%

270

821

124

4 121

0

100

200

300

400

500

600

700

800

900

0'-5' 6'-10' 11'-15' 16'-20' 21'-25' No Data

Num

ber

of C

ulve

rts

Cell Clear Height (ft)

Cell Clear Height for RC Box Culverts

1241 Culverts

66%

126

757

118146

49 45

0

100

200

300

400

500

600

700

800

-1 0'-5' 6'-8' 8'-15' 16'-20' 21'-50'

Num

ber

of C

ulve

rts

Fill Height (ft)

Fill Height for RC Box Culverts

1241 Culverts

61%

828

397

160

100

200

300

400

500

600

700

800

900

YES NO No Data

Num

ber

of C

ulve

rts

Bottom Slab for RC Box Culverts

1241 Culverts

67%

1191

32 180

200

400

600

800

1000

1200

1400

SIMPLE FIXED No Data

Num

ber

of C

ulve

rts

Moment Continuity for RC Box Culverts

1241 Culverts

96%

Outline- Kentucky’s Culverts- RC Box Culverts

- BRASS Program- Field Measurements- Conclusions- Acknowledgment

AASHTO MBE 2011

(2nd Edition)

AASHTO MBE 2011

(2nd Edition)For bridges rated in

ASD or LFD

BRASS Culvert

RC Box Culvert Rating Results

Total PercentageRF = 0.0 153 13.1

0.0 < RF < 0.5 130 11.10.5 < RF < 1.0 475 40.6

RF > 1.0 411 35.2

Total 1169 100.0

LFR HS 20 Inventory Rating for RC Box Culverts

153 (13.1%)130 (11.1%)

475 (40.6%)

411 (35.2%)

0

100

200

300

400

500

RF = 0.0 0.0 < RF < 0.5 0.5 < RF < 1.0 RF > 1.0

Num

ber

of C

ulve

rts

LFR HS20 INV Rating Factor for all counties

Failure Type Total Percentage

Flexural failure – Top slab 868 74.3

Flexural Failure – Wall 19 1.6

Flexural Failure – Bottom slab 40 3.4

Shear Failure – Top slab 236 20.2

Shear Failure – Wall 5 0.4

Shear Failure – Bottom slab 1 0.1

Total 1169 100.0

LFR HS 20 Inventory Rating for RC Box Culverts

Outline- Kentucky’s Culverts- RC Box Culverts- BRASS Program

- Field Measurements- Conclusions- Acknowledgment

Culvert Fill Height Measurement in Bourbon County

University of KentuckyKentucky Transportation Center

Link to Culvert Map: https://drive.google.com/open?id=1f290bzsz_JFsZWMKEN9BN7PnTaQ&usp=sharing

009B00054N

Database Field MeasurementFill (ft) 6.0 1.5LFR Inv. RF 0.49 1.23

009B00026N

Database Field MeasurementFill (ft) 14.0 13.0LFR Inv. RF 0.00 0.67

009B00069L

Database Field MeasurementFill (ft) 10.0 5LFR Inv. RF 0.00 1.09

009B00069R

Database Field MeasurementFill (ft) 10.0 6LFR Inv. RF 0.00 0.92

Arch Culverts

Metal Arch Culverts

076B00068N

STAAD Pro.

RC, Concrete, Masonry Arch Culverts

059B00034N

STAAD Pro.

Outline- Kentucky’s Culverts- RC Box Culverts- BRASS Program- Field Measurements

- Conclusions- Acknowledgment

Conclusion

Culvert Rating- Simple Analysis (BRASS)- FE Modeling- Field Testing

Outline- Kentucky’s Culverts- RC Box Culverts- BRASS Program- Field Measurements- Conclusions

- Acknowledgment

Acknowledgment- Kentucky Transportation Cabinet

- Federal Highway Administration

David Steele Anne Irish Erin Van Zee Dora Alexander Michael Edwards Tyler Blair

Questions?

Thank Youand

Have a Nice Day

KY