K Design Of Dowel Bar b2w6q
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RADIUS OF RELATIVE STIFFNESS
Radius of relative stiffness, l = [Eh 3 /12K(1-µ 2 )] 1/4 E H K u
3*10^5 25 2.84 0.15
L=
108.91 CM
12.5
25 23.11 26.5 33.8
4.36 FF/FB 1000 KG/CM2 1400 KG/CM2 321 KG/CM2
FS FF FB DIA OF DOWEL BAR LENGTH OF DOWEL BAR SPACING OF DOWEL BAR THICKNESS OF CONTRACTION T
25 MM 450 MM 350 MM 10 MM
PS
4906.25 Kg
PF
828.60 Kg
PB
2731.67 Kg load in kg=
5100
Required Load Carrying Capacity max of
0.416 =
ASSUME
2.462
2.462
45 CM SPACING ACTUAL CAPACITY IS =
1
0.770
0.541 =
ADOPT D LENGTH OF DOWEL BAR SPACING OF DOWEL BAR
0.311 0.082 2.705
25 MM 450 MM 450 MM
7.78 15.56 26.96
DOWEL CRADDLE 12 MM BARS 2 24
7= 0.75
14 18 32
0.89
28.48
55.44 7.04 690
l = [Eh 3 /12K(1-µ 2 )] 1/4
K OF GRAVEL
1.8 L
=
0.747
0.000
0.000
Nos in 7 M length KG
KG
196.0 CM
Kg per T Kg per CUM MT
RADIUS OF RELATIVE STIFFNESS
Radius of relative stiffness, l = [Eh 3 /12K(1-µ 2 )] 1/4 E H K u
3*10^5 25 2.84 0.15
L=
108.91 CM
TRIAL AND ERROR
56.42 16
4.36 FF/FB 1000 KG/CM2 1400 KG/CM2 321 KG/CM2
FS FF FB DIA OF DOWEL BAR LENGTH OF DOWEL BAR SPACING OF DOWEL BAR THICKNESS OF CONTRACTION T
31.49 57.92 65.22
32 MM 570 MM 1050 MM 10 MM
PS
8038.40 Kg
PF
1415.90 Kg
PB
4481.81 Kg load in kg=
5100
Required Load Carrying Capacity max of
0.254 =
ASSUME
1.441
105 CM SPACING ACTUAL CAPACITY IS =
1
0.464
0.000 =
ADOPT D LENGTH OF DOWEL BAR SPACING OF DOWEL BAR
1.464
32 MM 570 MM 1050 MM
DOWEL CRADDLE 12 MM BARS 2 24
7= 0.75
14 18 32
0.000
0.89
ess, l = [Eh 3 /12K(1-µ 2 )] 1/4
1.8 L
1.441
0.000
=
0.455
0.000
0.000
3.33 6.67 Nos in 7 M length 23.98 KG
28.48 KG
196.0 CM
52.46 Kg per T 6.66 Kg per CUM 653 MT
14500 1075 13.48837
RADIUS OF RELATIVE STIFFNESS
Radius of relative stiffness, l = [Eh 3 /12K(1-µ 2 )] 1/4 E H K u
3*10^5 25 2.84 0.15
L=
108.91 CM 40
12.5
4.36 FF/FB 1000 KG/CM2 1400 KG/CM2 321 KG/CM2
FS FF FB DIA OF DOWEL BAR LENGTH OF DOWEL BAR SPACING OF DOWEL BAR THICKNESS OF CONTRACTION T
22.56 43 57.6
25 MM 450 MM 350 MM 20 MM
PS
4906.25 Kg
PF
721.95 Kg
PB
2580.56 Kg load in kg=
5100
Required Load Carrying Capacity max of
0.416 =
ASSUME
2.826
42 CM SPACING ACTUAL CAPACITY IS =
1
0.786
0.572 =
ADOPT D LENGTH OF DOWEL BAR SPACING OF DOWEL BAR
2.858
25 MM 400 MM 420 MM
DOWEL CRADDLE 12 MM BARS 2 24
7= 0.75
14 18 32
0.357
0.89
ess, l = [Eh 3 /12K(1-µ 2 )] 1/4
1.8 L
2.826
0.143
=
0.791
0.000
0.000
8.33 16.67 Nos in 7 M length 25.68 KG
28.48 KG
196.0 CM
54.16 Kg per T 6.88 Kg per CUM 674 MT
RADIUS OF RELATIVE STIFFNESS
Radius of relative stiffness, l = [Eh 3 /12K(1-µ 2 )] 1/4 E H K u
3*10^5 25 2.84 0.15
L=
108.91 CM 53.4
16
4.36 FF/FB 1000 KG/CM2 1400 KG/CM2 321 KG/CM2
FS FF FB DIA OF DOWEL BAR LENGTH OF DOWEL BAR SPACING OF DOWEL BAR THICKNESS OF CONTRACTION T
29.78 56.4 71
32 MM 600 MM 350 MM 20 MM
PS
8038.40 Kg
PF
1213.63 Kg
PB
4531.80 Kg load in kg=
5100
Required Load Carrying Capacity max of
0.254 =
ASSUME
1.681
86 CM SPACING ACTUAL CAPACITY IS =
1
0.561
0.123 =
ADOPT D LENGTH OF DOWEL BAR SPACING OF DOWEL BAR
1.684
32 MM 540 MM 860 MM
DOWEL CRADDLE 12 MM BARS 2 24
7= 0.75
14 18 32
0.000
0.89
ess, l = [Eh 3 /12K(1-µ 2 )] 1/4
1.8 L
1.681
0.000
=
0.450
0.000
0.000
4.07 8.14 Nos in 7 M length 27.74 KG
28.48 KG
196.0 CM
56.22 Kg per T 7.14 Kg per CUM 700 MT
ts in concrete pavements Contraction ts -- to be povided in transverse direction with DOWEL bars(plain) Dowel bar dia --- 32mm/36mm as per design Groove 8 to 10mm in top 20mm, and 3 mm to 4mm below upto 1/3rd thickness, sealed with sealant spacing - Not greater than 4.5m Expansion ts -- to be povided in transverse direction with DOWEL bars(plain) Dowel bar dia --- 32mm/36mm as per design Groove 20 to 25mm upto the full thickness, (Compressible filler) +(sealed with sealant) spacing - Not greater than 30m(ie. every sixth t will be expansion type) Expansion t is obligatory at interface of pavement with other structures However IRC permits to do away with expansion ts ,if contraction t exist Longitudinal ts -- to be povided in longitudinal direction with TIE bars(HYSD) Tie bar dia --- 12mm/16mm as per design Groove formation and treatment --same as contraction t spacing - Not greater than one lane width, generally 3.5m to 3.75m Please refer to IRC -15 and IRC-58 for design and details
Radius of relative stiffness, l = [Eh 3 /12K(1-µ 2 )] 1/4 E H K u
3*10^5 25 2.84 0.15
L=
108.91 CM
12.5
25 23.11 26.5 33.8
4.36 FF/FB 1000 KG/CM2 1400 KG/CM2 321 KG/CM2
FS FF FB DIA OF DOWEL BAR LENGTH OF DOWEL BAR SPACING OF DOWEL BAR THICKNESS OF CONTRACTION T
25 MM 450 MM 350 MM 10 MM
PS
4906.25 Kg
PF
828.60 Kg
PB
2731.67 Kg load in kg=
5100
Required Load Carrying Capacity max of
0.416 =
ASSUME
2.462
2.462
45 CM SPACING ACTUAL CAPACITY IS =
1
0.770
0.541 =
ADOPT D LENGTH OF DOWEL BAR SPACING OF DOWEL BAR
0.311 0.082 2.705
25 MM 450 MM 450 MM
7.78 15.56 26.96
DOWEL CRADDLE 12 MM BARS 2 24
7= 0.75
14 18 32
0.89
28.48
55.44 7.04 690
l = [Eh 3 /12K(1-µ 2 )] 1/4
K OF GRAVEL
1.8 L
=
0.747
0.000
0.000
Nos in 7 M length KG
KG
196.0 CM
Kg per T Kg per CUM MT
RADIUS OF RELATIVE STIFFNESS
Radius of relative stiffness, l = [Eh 3 /12K(1-µ 2 )] 1/4 E H K u
3*10^5 25 2.84 0.15
L=
108.91 CM
TRIAL AND ERROR
56.42 16
4.36 FF/FB 1000 KG/CM2 1400 KG/CM2 321 KG/CM2
FS FF FB DIA OF DOWEL BAR LENGTH OF DOWEL BAR SPACING OF DOWEL BAR THICKNESS OF CONTRACTION T
31.49 57.92 65.22
32 MM 570 MM 1050 MM 10 MM
PS
8038.40 Kg
PF
1415.90 Kg
PB
4481.81 Kg load in kg=
5100
Required Load Carrying Capacity max of
0.254 =
ASSUME
1.441
105 CM SPACING ACTUAL CAPACITY IS =
1
0.464
0.000 =
ADOPT D LENGTH OF DOWEL BAR SPACING OF DOWEL BAR
1.464
32 MM 570 MM 1050 MM
DOWEL CRADDLE 12 MM BARS 2 24
7= 0.75
14 18 32
0.000
0.89
ess, l = [Eh 3 /12K(1-µ 2 )] 1/4
1.8 L
1.441
0.000
=
0.455
0.000
0.000
3.33 6.67 Nos in 7 M length 23.98 KG
28.48 KG
196.0 CM
52.46 Kg per T 6.66 Kg per CUM 653 MT
14500 1075 13.48837
RADIUS OF RELATIVE STIFFNESS
Radius of relative stiffness, l = [Eh 3 /12K(1-µ 2 )] 1/4 E H K u
3*10^5 25 2.84 0.15
L=
108.91 CM 40
12.5
4.36 FF/FB 1000 KG/CM2 1400 KG/CM2 321 KG/CM2
FS FF FB DIA OF DOWEL BAR LENGTH OF DOWEL BAR SPACING OF DOWEL BAR THICKNESS OF CONTRACTION T
22.56 43 57.6
25 MM 450 MM 350 MM 20 MM
PS
4906.25 Kg
PF
721.95 Kg
PB
2580.56 Kg load in kg=
5100
Required Load Carrying Capacity max of
0.416 =
ASSUME
2.826
42 CM SPACING ACTUAL CAPACITY IS =
1
0.786
0.572 =
ADOPT D LENGTH OF DOWEL BAR SPACING OF DOWEL BAR
2.858
25 MM 400 MM 420 MM
DOWEL CRADDLE 12 MM BARS 2 24
7= 0.75
14 18 32
0.357
0.89
ess, l = [Eh 3 /12K(1-µ 2 )] 1/4
1.8 L
2.826
0.143
=
0.791
0.000
0.000
8.33 16.67 Nos in 7 M length 25.68 KG
28.48 KG
196.0 CM
54.16 Kg per T 6.88 Kg per CUM 674 MT
RADIUS OF RELATIVE STIFFNESS
Radius of relative stiffness, l = [Eh 3 /12K(1-µ 2 )] 1/4 E H K u
3*10^5 25 2.84 0.15
L=
108.91 CM 53.4
16
4.36 FF/FB 1000 KG/CM2 1400 KG/CM2 321 KG/CM2
FS FF FB DIA OF DOWEL BAR LENGTH OF DOWEL BAR SPACING OF DOWEL BAR THICKNESS OF CONTRACTION T
29.78 56.4 71
32 MM 600 MM 350 MM 20 MM
PS
8038.40 Kg
PF
1213.63 Kg
PB
4531.80 Kg load in kg=
5100
Required Load Carrying Capacity max of
0.254 =
ASSUME
1.681
86 CM SPACING ACTUAL CAPACITY IS =
1
0.561
0.123 =
ADOPT D LENGTH OF DOWEL BAR SPACING OF DOWEL BAR
1.684
32 MM 540 MM 860 MM
DOWEL CRADDLE 12 MM BARS 2 24
7= 0.75
14 18 32
0.000
0.89
ess, l = [Eh 3 /12K(1-µ 2 )] 1/4
1.8 L
1.681
0.000
=
0.450
0.000
0.000
4.07 8.14 Nos in 7 M length 27.74 KG
28.48 KG
196.0 CM
56.22 Kg per T 7.14 Kg per CUM 700 MT
ts in concrete pavements Contraction ts -- to be povided in transverse direction with DOWEL bars(plain) Dowel bar dia --- 32mm/36mm as per design Groove 8 to 10mm in top 20mm, and 3 mm to 4mm below upto 1/3rd thickness, sealed with sealant spacing - Not greater than 4.5m Expansion ts -- to be povided in transverse direction with DOWEL bars(plain) Dowel bar dia --- 32mm/36mm as per design Groove 20 to 25mm upto the full thickness, (Compressible filler) +(sealed with sealant) spacing - Not greater than 30m(ie. every sixth t will be expansion type) Expansion t is obligatory at interface of pavement with other structures However IRC permits to do away with expansion ts ,if contraction t exist Longitudinal ts -- to be povided in longitudinal direction with TIE bars(HYSD) Tie bar dia --- 12mm/16mm as per design Groove formation and treatment --same as contraction t spacing - Not greater than one lane width, generally 3.5m to 3.75m Please refer to IRC -15 and IRC-58 for design and details
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