SINGLE PILES UNDER LATERAL LOADING
303
8. Compute a value of the relative stiffness factor T from the value of k
found in Step 7. Compare this value of T to the values of T assumed in Step 2
Repeat Steps 2 through 8 using the new value of T each time until the assumed
value of T equals the calculated value of T.
9. When the itérative procedure has been completed, the values of deflection
along the pile are known from Step 4 of the final itération. Values of soil reaction
are computed from the Basic expression: p = Epyy. Values of slope, moment,
and shear along the pile can be found by using the following équations:
El
a El
(11.16)
M = AmPtT + BmMt
(11.17)
V = A„P, +
(11.18)
The appropriate coefficients to be used in these équations can be obtained from
Figures 11.8 through 11.10.
(a)
0
1
2
3
4
5
Depth Coefficient, Z = x/T
Depth Coefficient, Z = x/T
Figure 11.8 Case I: Slope of pile caused by: (a) latéral load at mudline; (b) moment
at mudline.
Case II: Pile Head Fixed Against Rotation
When a pile is fixed firmly to a very stiff superstructure, he pi
beconsidered to be fixed against rotation. The further assumpnon i» m..l
any rotation of the superstructure is negligible.