View
239
Download
5
Category
Preview:
Citation preview
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
BRIDGE DESIGN AIDS • JULY 2012
California Standard Girder Shapes6-1.3
PRECAST-P RESTRESSED CONCRETE GIRDERS
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. Prestress Force
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
BRIDGE DESIGN AIDS • JULY 2012
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
PRECAST-P RESTRESSED CONCRETE GIRDERS
4
LRFD
(c) California Standard “Bath-Tub” Girder
Section Properties
7-7/8"
16-3/4"
2-7/8"
Optional Post -TensioningDucts
59"
3"
C.G. Prestress Force
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
BRIDGE DESIGN AIDS • JULY 2012
CA TUB55
CA TUB61
CA TUB67
CA TUB73
CA TUB79
CA TUB85
GirderSeries
Note: All dimensions are converted from SI unit.
PRECAST-P RESTRESSED CONCRETE GIRDERS
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
BRIDGE DESIGN AIDS • JULY 2012
GirderSeries
CA WF48CA WF54CA WF60CA WF66CA WF72CA WF78CA WF84CA WF90CA WF96CA WF102CA WF108CA WF114CA WF120
PRECAST-P RESTRESSED CONCRETE GIRDERS
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
BRIDGE DESIGN AIDS • JULY 2012
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
PRECAST-P RESTRESSED CONCRETE GIRDERS
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
6-1
BRIDGE DESIGN AIDS • JULY 2012
Note: Non-standard width and depth of voided slab can be manufactured without much extra cost.
PRECAST-P RESTRESSED CONCRETE GIRDERS
8
LRFD
( g ) Other Precast Girder Shapes
Precast Box Girder
Precast Double T Girder
6-1
Precast Delta Girder
BRIDGE DESIGN AIDS • JULY 2012
PRECAST-P RESTRESSED CONCRETE GIRDERS
Recommended