INPUT DATA
BRIDGE DIMENSIONS
Carrigeway width (m)
Length of Girder (mm)
Thickness of Deck Slab (mm)
Overall depth of L-girder (mm)
Depth of web (mm)
ABUTMENT CHARACTERISTICS
No. of bearings per abutment
Width of each bearing (mm)
Length of each bearing (mm)
Overall Thickness of each bearing (mm)
Overall Base width (mm)
Thickness of Base footing (mm)
Thickness of Abutment Cap (mm)
Height of Abutment Cap (mm)
Distance between Top of Footing and Base of Abutment Cap (mm)
Width of expansion joint (mm)
Clear distance of bearing from each edge (mm)
Width of Abutment Seat (mm)
Base width of stem (mm)
Width of inclined part of stem (mm)
Slope of Stem with horizontal
Width of Heel Slab (mm)
Width of Toe Slab (mm)
Width of Approach Slab and LL surcharge (from expansion joint)
LOADING ON ABUTMENT
Service DL Reaction per bearing (kN) - Outer Girder
Service LL Reaction per bearing (kN) - Outer Girder
Service DL Reaction per bearing (kN) - Inner Girder
Service LL Reaction per bearing (kN) - Inner Girder
Braking force per bearing (kN)
Creep, shrinkage strain (longitudinal strain) per bearing
Height of LL Surcharge heq (mm)
BACKFILL CHARACTERISTICS
Total height of backfill (mm)
Condition (1 for dry, 2 for wet)
Centre of Earth Pressure above top of slab base (mm)
Unit Weight (kN/m3)
Angle of internal friction Φ(degrees)
Φ (Radians)
δ (degrees)
δ (Radians)
Enter the slope of earth fill with horizontal β (degrees)
β (Radians)
Enter the slope of heel side vertical wall with vertical α (degrees)
α (Radians)
Ka (Coeff of Active Earth Pressure)
Angle of friction between soil and footing base (degrees)
Enter the Safe Bearing Capacity of Soil (kN/m 2)
MATERIAL CHARACTERISTICS
Unit weight of RC (kN/m ) 3
Shear Modulus of Bearing (MPa)
DATA
MENSIONS
7.8
20000
250
2300
2050
RACTERISTICS
3
400
520
96
4000
600
300
2146
2354
20
85
710
1350
340
0.11509817197021
1950
700
2250
ABUTMENT
383.70
421.33
468.15
284.00
23.33
0.00025
1200
ACTERISTICS
5100
1
2142
18
31
0.54
20.67
0.36
0 Horizontal backfill
0
0
0 Heel side of stem wall is vertical
0.30
21
150
RACTERISTICS
25
0.9
Name of Component V (kN/m)
DL from Superstructure 158.40
Self weight of base slab 60.00
Self weight of Abutment cap (till top of footing )-Part 1 of Abutment 33.75
Self weight of Abutment - Part 2 41.78
Self weight of Abutment - Part 3 (inclined stem) 10.00
Weight of earth (backfill) on heel slab 157.95
Approach Slab 14.06
LL Surcharge 48.60
Braking Force 0.00
Active earth pressure 0.00
Summation 524.56
STABILITY CHECKS
FOS AGAINST OVERTURNING 5.00
FOS AGAINST SLIDING 2.05
LOCATION OF RESULTANT FROM EDGE OF TOE x (m) 1.72
e = (B/2)-x (m) 0.28
6e/B 0.42
Max Base Pressure qmax (kN/m2) 185.82
Min Base Pressure qmin (kN/m )
2
76.46
H (kN/m) Lever arm - V (mm) Lever arm - H (mm) Mv (kNm/m)
0.00 1385.00 0.00 219.39
0.00 2000.00 0.00 120.00
0.00 1900.00 0.00 64.13
0.00 1395.00 0.00 58.29
0.00 926.67 0.00 9.27
0.00 3025.00 0.00 477.80
4.22 2875.00 2550.00 40.43
14.58 2875.00 2550.00 139.73
8.97 0.00 3050.00 0.00
70.23 0.00 2142.00 0.00
98.00 1129.03
SAFE
SAFE
INCREASE BASE WIDTH
SAFE
MH (kNm/m)
0.00
0.00
0.00
0.00
0.00
0.00
10.76
37.18
27.37
150.43
225.73
Name of Component V (kN/m)
DL from Superstructure 158.40
LL from Superstructure 140.83
Self weight of base slab 60.00
Self weight of Abutment cap (till top of footing )-Part 1 of Abutment 33.75
Self weight of Abutment - Part 2 41.78
Self weight of Abutment - Part 3 (inclined stem) 10.00
Weight of earth on heel slab 157.95
Approach Slab 14.06
Braking Force 0.00
Active earth pressure 0.00
Summation 616.79
STABILITY CHECKS
FOS AGAINST OVERTURNING 6.31
FOS AGAINST SLIDING 2.84
LOCATION OF RESULTANT FROM EDGE OF TOE x (m) 1.62
e = (B/2)-x (m) 0.38
6e/B 0.58
Max Base Pressure qmax (kN/m2) 218.49
Min Base Pressure qmin (kN/m )
2
65.35
H (kN/m) Lever arm - V (mm) Lever arm - H (mm) Mv (kNm/m)
0.00 1385.00 0.00 219.39
0.00 1385.00 0.00 195.05
0.00 2000.00 0.00 120.00
0.00 1900.00 0.00 64.13
0.00 1395.00 0.00 58.29
0.00 926.67 0.00 9.27
0.00 3025.00 0.00 477.80
4.22 2875.00 2550.00 40.43
8.97 0.00 2954.00 0.00
70.23 0.00 2142.00 0.00
83.42 1184.36
SAFE
SAFE
INCREASE BASE WIDTH
SAFE
MH (kNm/m)
0.00
0.00
0.00
0.00
0.00
0.00
0.00
10.76
26.51
150.43
187.69
