Enter Figure 7-75 with d/gT = 0.0191 to the curve marked Breaking limit 

 and read , 



2 

 gT 



= 0.014 



Therefore, 



H^ = 0.014 gT^ = 0.014(9.8) (8)^ = 8.8 m (28.9 ft) 



The ratio of the design wave height to the breaking height is 



H 3.0 ^ ^. 

 H^=8:8 = ^'^"^ 



*************************************** 



By using equations (7-37) through (7-40) with Figures 7-71 through 1-7 h^ 

 the maximum values of the force and moment components can be found. To 

 estimate the maximum total force F^ , Figures 7-76 through 7-79 by Dean 

 (1965a) may be used. The figure to be used is determined by calculating 



W = TT-fT (7-41) 



and the maximum force is calculated by 



F^ = ^rn ^Z?"^D (7-42) 



where ^ is the coefficient read from the figures. Similarly, the maximum 



moment I^ can be determined from Figure 7-80 through 7-83, which are also 



based on Dean's stream-function theory (Dean, 1965a). The figure to be used 

 is again determined by calculating W using equation (7-41), and the maximum 

 moment about the mud line (z = -d) is found from 



^n = ^ " Cp H%d (7-43) 



where ol_ is the coefficient read from the figures. 



Calculation of the maximum force and moment on a vertical cylindrical pile 

 is illustrated by the following examples. 



7-118 



