The material type used was linear elastic with material property as given as in above Table.

The structure was made 132" long however the analysis was carried out considering that the

height of the wall above the ground was 120". To model this condition the constraint was applied

to the bottom 12" section by constraining all degrees of freedom for this section. Also the node at

UY, and UZ while the all the rotational freedoms were allowed.

The load applied to the structure was uniform pressure of 0.5 psi. In actual condition the

pressure from the water level will have a gradient increasing from top to bottom. However in this

case the pressure was determined by considering that the maximum pressure applied by the water

level of height `h' can be given by

where

P = pressure

ρ = density of water

g = acceleration due to gravity

h = height of the water level (120").

Substituting the standard values in the above equation the maximum static pressure applied

by the water level is 0.433 psi. Hence the constant pressure more than the actual maximum

pressure tends to overload the structure and hence can be considered as a attempt to take into

account the dynamic loading of the structure due to the waves in the water body. **It should be**

The results from the present FEA were analyzed with respect to maximum stress and

maximum strain developed in the structure. Figure C5 shows the displacement of the structure.

The maximum displacement as can be expected is observed at the tip of the seawall and is 32".

Figure C6 shows first principal stress distribution in the structure. As can be seen from the

figure that the maximum stress is developed at the edge where the structure emerges from the

earth surface or the support condition. The maximum stress value of 8449 psi seems to be larger

than the maximum tensile strength of 6300 psi of the material. **However the development of**

Figure C7 shows the maximum first principal strain in the structure. As the case should be the

maximum stress and maximum strain region does coincide. However the maximum principle

strain can be observed to be approximately 2.1%, which is far less than the maximum strain to

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