Seismic response reductions of offshore platform
- Kagoshima Univ. (Japan). Dept. of Ocean Civil Engineering
- Sumitomo Metal Industries Ltd., Tokyo (Japan). Construction Technology Dept.
Offshore structures provide great possibilities for the development and utilization of the resources and energy of the ocean. The environment of offshore structures is usually subjected to more severe load conditions than those on the land. Seismic ground motions and random sea waves are two main design loads for an offshore platform located in a seismically active region. Since these loads have stochastic properties, the random vibration approach provides effective methods of dynamic response evaluations. In order to enhance the reliability of the design of offshore structures, it is important to evaluate the exact dynamic response. If this dynamic response can be reduced using the control methods such as passive control and active control, then the design process of offshore structure can enhance the reliability against the severe load conditions. In this study, the effects on the dynamic response reductions of an offshore platform subjected to seismic loads are examined using the passive and active control methods. It is shown that the effective reductions of the response can be implemented with the combinations of the passive control method and the active control method.
- OSTI ID:
- 260408
- Report Number(s):
- CONF-950604--; ISBN 1-880653-19-2
- Country of Publication:
- United States
- Language:
- English
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