## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 2American Society of Mechanical Engineers, 2001 - Arctic regions |

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Page 129

If the

the original code - designed structure , then the relationship between Mac and

Md is , for the same return period ( 6 RSR - MU ( 3 ) м . where the subscript d ...

If the

**diameter**of the cost - optimised structure is allowed to change from that ofthe original code - designed structure , then the relationship between Mac and

Md is , for the same return period ( 6 RSR - MU ( 3 ) м . where the subscript d ...

Page 130

In ( A / Ac ) assumptions may be considered , with regard to the design of the

structure 1 . the caisson

t ) is varied or 2 . Dis varied and the ratio Dit is held constant . Case ( 1 ) is

realistic ...

In ( A / Ac ) assumptions may be considered , with regard to the design of the

structure 1 . the caisson

**diameter**( D ) remains constant , and the wall thickness (t ) is varied or 2 . Dis varied and the ratio Dit is held constant . Case ( 1 ) is

realistic ...

Page 150

... displacements of a few

are conducive to pipeline embedment but ... by increasing or decreasing the

concrete weight coating and in turn the pipe

stability .

... displacements of a few

**diameters**are considered acceptable because theseare conducive to pipeline embedment but ... by increasing or decreasing the

concrete weight coating and in turn the pipe

**diameter**to achieve the requiredstability .

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