Response of concrete gravity platforms to earthquake excitations

Journal Article · Wed Mar 01 04:00:00 EST 1978 · J. Pet. Technol.; (United States)

DOI:https://doi.org/10.2118/6316-PA· OSTI ID:6284198

Watt, B J; Boaz, I B; Dowrick, D J

An analytical study conducted by Ove Arup and Partners and Shell Oil Co. suggests that concrete gravity production platforms can be designed to withstand earthquake forces in waters 3300 to 6600 ft (100 to 200 m) deep. The major variables governing the system's earthquake response are the foundation compliance, base mass, and damping behavior. In low ranges of soil stiffness, foundation instability limits the technical feasibility, whereas in high ranges, structural loads (especially leg moments) govern the design. Motions at deck level require special attenton to the design of topside facilities, especially the drilling derrick, transmission mast, and deck cranes. Conductor and marine-riser designs must consider special precautions for relative motions between the structure and the mudline under extreme loads.

• OSTI ID: 6284198
• Journal Information: J. Pet. Technol.; (United States), Journal Name: J. Pet. Technol.; (United States) Vol. 30; ISSN JPTJA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300 -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
423000* -- Engineering-- Marine Engineering-- (1980-)
BUILDING MATERIALS
CONCRETES
DESIGN
DRILLING
EARTHQUAKES
MARINE RISERS
MATERIALS
OFFSHORE DRILLING
OFFSHORE PLATFORMS
PIPES
SEISMIC EVENTS