Compliant offshore structure with fixed base

Details Compliant offshore structure with fixed base Compliant offshore structure with fixed base

1987-06-04

1989-03-07

Corbin, David H.

Hydraulic and earth engineering

Marine structure or fabrication thereof

With anchoring of structure to marine floor

405202, 405204, E02B 1700

Patent

active

048101354

ABSTRACT:
A compliant offshore structure in which the primary restoring force to lateral displacement is provided by elongate flex elements. A gravity base is rigidly secured to the ocean bottom. A tower extends vertically upward from the base to a position above the ocean surface. A work deck is supported atop the tower. The tower is secured to the base by elongate flex elements which are arranged in an array surrounding the central axis of the structure. Each flex element has one end secured to the base and a second end secured to the tower. The flex elements permit the tower to pivot about its lower end, thus providing the tower and deck with a compliant response to environmental forces. The flex elements also support the tower above and free from contact with the base. This eliminates the need for a vertical load bearing joint between the tower and base.

REFERENCES:
patent: Re32119 (1986-04-01), Abbott et al.
patent: 3636716 (1972-01-01), Castellanos
patent: 3670515 (1972-06-01), Lloyd
patent: 4284367 (1981-08-01), Tuson et al.
patent: 4482274 (1984-11-01), Brandi et al.
patent: 4696601 (1987-09-01), Davenport
patent: 4696603 (1987-09-01), Danaczko et al.
"Exxon Study Shows Compliant Piled Tower Cost Benefits", by Maus et al., Ocean Industry, Mar. 1986, pp. 20-25.
"Norwegian North Sea Compliant Tower", informal undated report authored by Hasle, Erik of Aker Engineering A/S.

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