Life-Cycle Reliability Characteristics of Minimum Structures

[+] Author and Article Information
R. G. Bea

Department of Civil Engineering, University of California at Berkeley, 212 McLaughlin Hall, Berkeley, CA 94720

A. Brandtzaeg

Department of Marine Structures, Norwegian Institute of Technology, Trondheim, Norway

M. J. K. Craig

UNOCAL Corporation, Houston, TX

J. Offshore Mech. Arct. Eng 120(3), 129-138 (Aug 01, 1998) (10 pages) doi:10.1115/1.2829533 History: Received October 03, 1997; Revised February 27, 1998; Online December 17, 2007


Minimum structures are used primarily because of their low initial investment and fast-track schedule characteristics. These structures generally cost less and take less time to commission than more traditional structures such as four-pile (leg) platforms. A wide variety of configurations of these structures have been proposed and installed in offshore locations around the world (Craig, 1995). This paper details a reliability and risk-based approach that has been used to characterize the life-cycle risk characteristics of three minimum structures and one traditional four-pile structure. The structures were all designed according to current American Petroleum Institute guidelines (1993). Results from the life-cycle (design, construction, operation) analyses of the quality and risk characteristics of the alternative structures are summarized. The occurrences and influences of human errors throughout the life-cycle are included.

Copyright © 1998 by The American Society of Mechanical Engineers
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