Abstract

The results of a calibration study of the new simplified fatigue design procedure adopted in API RP2A are presented. Detailed fatigue analyses were performed on seven structures with different geometries, natural periods, and water depths ranging from 58 feet to 314 feet. The calibration results along with realistic descriptions of the long-term wave climate for different water depths in the Gulf of Mexico were used to develop curves of allowable hot spot stress. These curves will be included in the 17th Edition of API RP2A as new recommended design values.

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