Offshore Structure Platform Design - Offshore Structures: Design, Construction and Maintenance - page 104

The benefits and general functions of the bracing system are:

Transmission of the horizontal load to the soil through the pile foundation

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Provision of structural integrity during fabrication and installation

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Resistance to the wrenching motion of the installed jacket-pile system

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Support for the corrosion anodes and well conductors

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3.4 JACKET DESIGN
Virtually all of the decisions about design depend on the jacket leg. The soil
conditions and foundation requirements often control the leg size.
The golden rule in jacket design is to minimize the projected area of the
member near the water surface (high wave zone), to minimize the load on
the structure and to reduce the foundation requirements.
From the joint industrial project study (1999), Figures 3.9 and 3.10 present
the prototype in three dimension and the buckling of the K bracing member,
respectively.

Hydraulic
jack

Steel
frame to
support
and to
measure
the
deformation

Fixation in
the bottom

FIGURE 3.9 Shape of the jacket model in two dimensions for the load test.