Civil Insight: A Technical Magazine Volume 3 | Page 61

Gautam A. et al.
Civil Insight (2019) 57-63
Table 3. (continued)
Pile X (m) Y (m) X 2 (m 2 ) Y 2 (m 2 ) Axial (kN)
12
13
14
15
16 4.50
-4.50
-1.50
1.50
4.50 1.50
4.50
4.50
4.50
4.50 20.25
20.25
2.25
2.25
20.25
180.00 2.25
20.25
20.25
20.25
20.25
180.00 1170
1170
1170
1170
1170
6 
Due to ML
(kN)
69.6
208.8
208.8
208.8
208.8
Due to MT
(kN)
531.1
-531.1
-177.0
177.0
531.1
Maximum
Total
(kN)
1771
848
1202
1556
1910
1910
3.2) Load Distribution on piles using the Finite Element Method (FEM)
The values of spring stiffness of soil computed using Eqn (2), Eqn (3), Eqn (4), Eqn (5), and Eqn (6) are
presented in Table 4 and Table 5.
Table 4. Lateral and frictional spring stiffness of soil using E p = 2.74E+07kN/m 2 and I p = 0.0491m 4
Depth (m) E (kN/m 2 ) 
Q G (kN/m 2 )
0-3 32500 0.25 3-6 67200 6-9 Below 9
Spring Stiffness (kN/m)
Lateral Friction
13000 1.65E+04 6.76E+03
0.30 25846 3.74E+04 1.37E+04
32500 0.35 12037 1.77E+04 6.50E+03
67200 0.35 24889 3.88E+04 1.34E+04
Table 5. End bearing spring stiffness of soil
End Bearing Stiffness (kN/m)
7.66E+04
For the FEM model, the load was applied at the top of the pile cap, which is given in Table 6.
Table 6. Load at the top of the pile cap
Axial Load (kN) Moment Longitudinal or ML (kNm) Moment Transverse or MT (kNm)
11806 8351 21244
The distribution of axial load computed from FEM modeling of the bridge pile foundation is given in Table
7.
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