Inherent features of jack-up units, including their mobility and their integrated and standardized form, make them well suited for certain field developments. An overview of the configurations and attributes of production jack-ups is presented, including a database of applications to date. The relationship between jack-up configuration and structural reliability under storm overload is then explored. Critical values of the wave height exponent α are presented for a wide range of water depths and jack-up geometries, along with selected pushover analysis results. There is a strong tendency for the structural reliability to decrease in shallower water depths and when the jack-up is elevated in the water column by a storage tank or braced base. The latter is due essentially to the non-proportional increase in environmental loading down the structure with increasing return period.
Influence of Non-Proportional Environmental Loading on the Reliability of Production Jack-ups
Contributed by the OOAE Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received by the ASME OOAE Division, July 2001; final revision, December 2001. Associate Editor: C. Guedes Soares.
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Ronalds, B. F., Bjarke , T., and Trinh, S. (August 1, 2002). "Influence of Non-Proportional Environmental Loading on the Reliability of Production Jack-ups ." ASME. J. Offshore Mech. Arct. Eng. August 2002; 124(3): 146–152. https://doi.org/10.1115/1.1492824
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