The effect of dynamic rebound on the design of fixed offshore structures using API directional wave criteria
Book
·
OSTI ID:433941
The API RP 2A 20th Edition allows for directionality in wave loading, with the wave height in the minimum direction as low as 70% of the wave height in the maximum direction. The resulting statically applied loads may differ by as much as 50% from the maximum to the minimum wave directions. This paper describes the finding that dynamic directional wave loading design according to API RP 2A can result in much larger than expected loads along the reverse direction to that of the major wave heading. Rigorous random wave analyses on jackets in 600 to 900 ft water depths using RP 2A and accounting for dynamic structural behavior, revealed significant rebound (opposite to major wave heading) inertial loading. These rebound loads were larger than the applied loads from the minimum wave specified by RP 2A directional criteria. Results quantify and explain the components of the rebound load. This paper develops a practical recipe, using RP 2A, that accounts for dynamic structural response. The design procedure is verified with rigorous random wave analysis results.
- OSTI ID:
- 433941
- Report Number(s):
- CONF-960525--
- Country of Publication:
- United States
- Language:
- English
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