Session A.6: Analysis of Structures

Hamish Hall, WSP

The physical modelling undertaken were all in fresh water. What do the panel think the impacts would have been if air entrainment or salty water had been considered?

Authors replies

D Tsujio

Our study is based on the parametric modelling of a caisson breakwater. Since we did not conduct the physical modelling to consider air entrainment or salty water, it is difficult to answer whether it is necessary to consider the impacts of this, although the effects of salty water on this study are expected to be negligible.

J Monso

This is a very difficult question because due to the complexity of the breaking process in the surroundings of a vertical structure, the hydrodynamics of wave impacts are still not properly or fully understood. If we add to that the presence of entrained air, which is much more compressible than water, it further complicates the process.