PRECAST-PRESTRESSED CONCRETE · PDF fileBRIDGE DESIGN AIDS • J ULY 2012 6-1 1 LRFD...

BRIDGE DESIGN AIDS • JULY 2012

16-1

LRFD

PRECAST-P RESTRESSED CONCRETE GIRDERS

P6-1 RECAST-PRESTRESSED CONCRETE GIRDERS

Typical Girder Shape and Span Length

Girder Type Possible Span Length50’ to 125’80’ to 150’80’ to 150’80’ to 200’20’ to 70’40’ to 120’60’ to 120’30’ to 100’

Preferred Span Length50’ to 95’95’ to 150’80’ to 120’80’ to 180’20’ to 50’40’ to 100’60’ to 100’30’ to 60’

California I-Girder

Precast Box GirderPrecast Delta GirderPrecast Double T Girder

California Bulb-Tee GirderCalifornia Bath-Tub GirderCalifornia Wide-Flange GirderCalifornia Voided Slab

Bridge Type Possible Span Length

30’ to 200’

100’ to 325’

200’ to 450’

Preferred Span Length

30’ to 180’

120’ to 250’

250’ to 400’

Precast-pretensioned GirderPost-tensioned Spliced Precast Girder

Segmental Precast-pretensioned Girder

See the list of Precast Girder Bridge Standard Detail Sheets (XS Sheets) at: www.dot.ca.gov/hq/esc/techpubs/manual/bridgemanuals/bridge-standard-detail-sheets

Note:

6-1.1

Typical Precast Bridge Type and Span Length6-1.2

2

LRFD

(a) California Standard “I” Girder

Section PropertiesaerA ssorG"h""D"

(in2) (in4) (in3) (in3) )tf/sbl()ni()ni()ni )ni(((ft-in)

3’-0’’CA I36

CA I42

CA I48

CA I54

CA I60

CA I66

3’-6’’

4’-0’’

4’-6’’

5’-0’’

5’-6’’

15

21

27

33

39

45

432

474

63,000

95,400

136,400

186,400

246,900

318,000

17.1

20.0

22.8

25.7

28.6

31.6

20.0

25.2

28.3

31.4

34.4

14.2

16.3

18.3

20.3

22.3

18.9 3,684.2

4,770.0

5,982.5

7,264.6

6,832.9

10,063.3

4,336.4

5,412.7

6,597.2

7,863.1

9,244.2

3,333.3 12.1 450

Icg yb yt Sb St r WeightGirderSeries

558

516

642

600

494

581

538

669

625

19"

"6 "7 6"

"h"

"6"3

"6"6

"D"

"X"

"e"

"y " b

"y " t

C.G. Section

C.G. Prestress Force

6-1


California Standard Girder Shapes6-1.3


3

LRFD

(b) California Standard “Bulb-Tee” Girder

Section Properties"D" "h" Gross

Area(in2) (in4) (in3) (in3) )tf/sbl()ni()ni()ni( (in)(ft-in)

4’-7 1/8’’

5’-6 7/8’’

6’-0 7/8’’

6’-6 3/4’’

7’-0 5/8’’

5’-1’’

33.465

39.370

45.276

51.181

57.087

62.992

925

971

373,350

483,385

610,718

755,589

919,200

1,102,271

28.4

31.3

34.2

37.2

40.1

43.1

29.7

32.7

35.6

38.6

41.6

22

24

27

29

31

26.7 13,153

15,444

17,830

20,309

22,912

25,592

16,262

18,689

21,207

23,800

26,513

13,966 20 963

Icg yb yt Sb St r Weight

1,063

1,018

1,157

1,110

1,012

1,108

1,060

1,205

1,157

"h"

3-15

/16"

5-7/

8"7-

7/8"

"D"

"X"

"e"

"y" b


C.G. Section

"y" t

47-1/4"3-

15/1

6"

Optional Post-Tensioning Ducts

R = 7-7/8" (t yp)

29-1/2" Note: All dimensions are converted from S I unit.

19-11/16" 19-11/16"7-7/8"

6-1


CA BT55

CA BT61

CA BT67

CA BT73

CA BT79

CA BT85

4’-1’’ 27.375 272,373 25.3 23.7 1810,766 11,493856 892CA BT49

GirderSeries


4

LRFD

(c) California Standard “Bath-Tub” Girder

Section Properties

7-7/8"

16-3/4"

2-7/8"

Optional Post -TensioningDucts

59"

3"


3"

6-7/

8"

“D”

11 3

/4"

“h”

“X”

“e”

2"

6-7/

8"

4-7/

8"

1

4

"y " b

"y " t

C.G. Section

"h""D" Gross Area

(in2) (in4) (in3) (in3) )tf/sbl()ni()ni()ni( (in)(ft-in)

4’-7 1/8’’

5’-6 7/8’’

6’-0 7/8’’

6’-6 3/4’’

7’-0 5/8’’

5’-1’’

36.4

42.3

48.2

54.1

60.0

65.9

460,081

604,231

773,128

968,692

1,192,606

1,446,551

24.1

26.9

29.7

32.6

35.4

38.3

34.1

37.2

40.3

43.3

46.4

21

22

24

26

28

31.0 19,095

22,471

26,010

29,752

33,695

37,801

17,702

20,780

24,052

27,513

31,190

14,830 19

Icg yb yt Sb St r Weight

1,627

1,531

1,435

1,339

1,819

1,723

1,495

1,395

1,695

1,595

1,895

1,795

6-1


CA TUB55

CA TUB61

CA TUB67

CA TUB73

CA TUB79

CA TUB85

GirderSeries

Note: All dimensions are converted from SI unit.


5

LRFD(d) California Standard Pretensioned “Wide-Flange” Girder

Section Properties“y

t”

C.G. Section

4’-0”“D

”

“X”

C.G. PrestressForce

61/2” 1’-83/4”1’-83/4”

r = 10”

3” 13 / 4”

r = 2½”(typ)

3/4” Chamfer 21 / 2”

3’-9”

8 @ 2” = 1’-4”

6 sp

. @

2” =

1’-0

”

“yb”

“e”

61 / 8”

r = 10”

31/2”

1” (typ)

63 / 8”

1’-71/4”

r = 2½” (typ)

Size "D" A I “yb” “yt” Sb St r w (ft-in) (in) (in2) (in4) (in) (in) (in3) (in3) (in) (lb/ft)

4’-0” 48 882 274, 880 20.69 27.31 13, 290 10, 070 17.65 920

4’-6” 54 921 369, 100 23.23 30.77 15, 890 12, 000 20.02 960 5’-0” 60 960 479, 620 25.82 34.18 18, 580 14, 030 22.35 1, 000 5’-6” 66 999 607, 130 28.44 37.56 21, 350 16, 160 24.65 1, 040 6’-0” 72 1, 038 752, 430 31.08 40.92 24, 210 18, 390 26.92 1, 080 6'-6" 78 1, 075 913, 490 33.77 44.23 27, 050 20, 650 29.15 1, 120 7’-0” 84 1, 116 1, 099, 400 36.45 47.55 30, 160 23, 120 31.39 1, 160 7'-6" 90 1, 153 1, 297, 900 39.19 50.81 33, 120 25, 550 33.55 1, 200 8’-0” 96 1, 194 1, 526, 600 41.91 54.09 36, 430 28, 220 35.76 1, 240 8'-6" 102 1, 231 1, 764, 700 44.68 57.32 39, 500 30, 790 37.86 1, 280 9’-0” 108 1, 272 2, 039, 200 47.42 60.58 43, 000 33, 660 40.04 1, 330 9'-6" 114 1, 309 2, 319, 500 50.23 63.77 46, 180 36, 370 42.09 1, 360

10’-0” 120 1, 350 2, 643, 200 52.99 67.01 49, 880 39, 450 44.25 1, 410

6-1


GirderSeries

CA WF48CA WF54CA WF60CA WF66CA WF72CA WF78CA WF84CA WF90CA WF96CA WF102CA WF108CA WF114CA WF120


6

LRFD

Section PropertiesSize "D" A I “yb” “yt” Sb St r w (ft-in) (in) (in2) (in4) (in) (in) (in3) (in3) (in) (lb/ft)

4'-0" 48 954 289, 440 20.94 27.06 13, 820 10, 700 17.42 990 4'-6" 54 1, 002 389, 840 23.54 30.46 16, 560 12, 800 19.72 1, 040 5'-0" 60 1, 050 508, 060 26.18 33.82 19, 410 15, 020 22.00 1, 090 5'-6" 66 1, 098 644, 950 28.85 37.15 22, 360 17, 360 24.24 1, 140 6'-0" 72 1, 146 801, 460 31.55 40.45 25, 400 19, 810 26.45 1, 190 6'-6" 78 1, 192 975, 690 34.29 43.71 28, 450 22, 320 28.61 1, 240 7'-0" 84 1, 242 1, 177, 000 37.01 46.99 31, 800 25, 050 30.78 1, 290 7'-6" 90 1, 288 1, 393, 100 39.80 50.20 35, 000 27, 750 32.89 1, 340 8'-0" 96 1, 338 1, 642, 000 42.56 53.44 38, 580 30, 730 35.03 1, 390 8'-6" 102 1, 384 1, 902, 800 45.38 56.62 41, 930 33, 610 37.08 1, 440 9'-0" 108 1, 434 2, 202, 900 48.16 59.84 45, 740 36, 810 39.19 1, 490 9'-6" 114 1, 480 2, 511, 700 51.01 62.99 49, 240 39, 870 41.20 1, 540

10'-0" 120 1, 530 2, 867, 100 53.81 66.19 53, 280 43, 320 43.29 1, 590

6-1

GirderSeries

CA WF48PTCA WF54PTCA WF60PTCA WF66PTCA WF72PTCA WF78PTCA WF84PTCA WF90PTCA WF96PTCA WF102PTCA WF108PTCA WF114PTCA WF120PT


1’-83/4”

C.G. PrestressForce (near supports)

“yt”

C.G. Section

4’-11/2”

“D”

C.G. Prestress

8” 1’-83/4”

r = 10”

3” 13 / 4”

r = 21/2”(typ)

3/4” Chamfer 21 / 2”

3’-101/2”

8 @ 2” = 1’-4”

3 @

2”=6

”

“yb”

“eb”

61 / 8”

r = 10”

31/2”

63 / 8”

1’-71/4” Post-Tensioning Ducts (4" Max, OD)

“et”

33/4”

r = 21/2” (typ)

1” C

lr M

in

(e) California Standard Post-Tensioned “Wide-Flange” Girder


Force (at midspan)

7

LRFD

36’’

12’’

15’’

7’’o/

7 / ’’12

10 / ’’12 10 / ’’12

7 / ’’12

48’’

12’’

7’’o/

15’’

9’’

10 / ’’12 14 / ’’129 / ’’12 9 / ’’1214 / ’’1210 / ’’12

9’’

9’’

9’’

9’’o/ 9’’o/ 9’’o/ 9’’o/9’’o/

9’’o/

15’’10 / ’’12 10 / ’’12

14’’

7’’o/

7 / ’’12

10 ’’ 14 ’’ 10 ’’

14’’10 ’’ 14 ’’ 10 ’’

7 / ’’12

7’’o/ 7’’o/

10 / ’’12

10 / ’’12

10 / ’’12

10 / ’’12

12’’o/

12’’o/

12’’o/

12’’o/

Indicates void

( f ) California Standard “Voided” Slab

SI - 36

SII - 36

SIII - 36

SIV - 36

SI - 48

SII - 48

SIII - 48

SIV - 48

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Note: Non-standard width and depth of voided slab can be manufactured without much extra cost.


8

LRFD

( g ) Other Precast Girder Shapes

Precast Box Girder

Precast Double T Girder

6-1

Precast Delta Girder



PRECAST-PRESTRESSED CONCRETE · PDF fileBRIDGE DESIGN AIDS • J ULY 2012 6-1 1 LRFD...

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