Seismic Risk Analysis of Mega-Floating Structure and Dolphin System

[+] Author and Article Information
T. Koike

Kawasaki Steel Corporation, 351 Naganuma-cho, Inage-ku, Chiba 263-0005, Japan

T. Hiramoto, H. Mori

Kawasaki Steel Corporation, Tokyo 100, Japan

J. Offshore Mech. Arct. Eng 121(2), 95-101 (May 01, 1999) (7 pages) doi:10.1115/1.2830084 History: Received September 01, 1998; Revised January 06, 1999; Online December 17, 2007


The floating type structural system is applicable to large offshore structures including airports, power plants, and multi-purpose facilities. Such a large-scale floating structure should be in service at least 100 yr because of the large capital investments and social utilization, so it also should be designed to be safe and stable against several natural hazards and accidents during its service life. In this report, seismic response and risk analyses of a mega-floating structure supported with many dolphins (MFSD) are carried out to study the mutual interaction and its instability of the floating-dolphin system against earthquake attack. The final goal is to obtain the optimal allocation of dolphins to minimize the displacement of an MFSD.

Copyright © 1999 by The American Society of Mechanical Engineers
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