SEISMIC ANALYSIS OF SECONDARY SYSTEMS INSTALLED ON TOPSIDE OF OFFSHORE PLATFORMS

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HAJARI MOHAMMAD ALI; AGHAKOUCHAK ALI AKBAR

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Paper Information

Journal: JOURNAL OF MARINE ENGINEERING Year:2015 | Volume:11 | Issue:21 Page(s): 69-82

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Title

SEISMIC ANALYSIS OF SECONDARY SYSTEMS INSTALLED ON TOPSIDE OF OFFSHORE PLATFORMS

Author(s)

HAJARI MOHAMMAD ALI | AGHAKOUCHAK ALI AKBAR | Issue Writer Certificate

Keywords

OFFSHORE PLATFORMQ2

SECONDARY SYSTEMQ2

NONSTRUCTURAL COMPONENTSQ2

SEISMIC ANALYSISQ2

INTERACTION BETWEEN STRUCTURE AND SECONDARY SYSTEMQ2

Abstract

Topsides of OFFSHORE PLATFORMs contain different equipment, therefore earthquake excitation may impose large forces on them. However during design of these topsides, the interaction of the SECONDARY SYSTEMs and primary structure is not usually considered, which may result in a non-realistic response of structure. In order to study this subject, by using Open Sees software, a 3D model of a typical platform in the Persian Gulf is constructed and analyzed, when subjected to different records of ground motion. These records are scaled for two earthquake levels. In the first level the structure is in elastic condition but for the second level it behaves inelastically. According to the results, for SECONDARY SYSTEMs with low periods of vibration, interactions between structure and SECONDARY SYSTEM can be neglected. But when the period of SECONDARY SYSTEM is increased, it is necessary to consider interactions effects. According to the results of this research, when ratio of the frequency of SECONDARY SYSTEM to primary structure is less than 7 or 10 for linear and nonlinear conditions, respectively, a conservative estimate of response may be obtained by neglecting the interaction effects.

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APA: Copy

HAJARI, MOHAMMAD ALI, & AGHAKOUCHAK, ALI AKBAR. (2015). SEISMIC ANALYSIS OF SECONDARY SYSTEMS INSTALLED ON TOPSIDE OF OFFSHORE PLATFORMS. JOURNAL OF MARINE ENGINEERING, 11(21), 69-82. SID. https://sid.ir/paper/60806/en

Vancouver: Copy

HAJARI MOHAMMAD ALI, AGHAKOUCHAK ALI AKBAR. SEISMIC ANALYSIS OF SECONDARY SYSTEMS INSTALLED ON TOPSIDE OF OFFSHORE PLATFORMS. JOURNAL OF MARINE ENGINEERING[Internet]. 2015;11(21):69-82. Available from: https://sid.ir/paper/60806/en

IEEE: Copy

MOHAMMAD ALI HAJARI, and ALI AKBAR AGHAKOUCHAK, “SEISMIC ANALYSIS OF SECONDARY SYSTEMS INSTALLED ON TOPSIDE OF OFFSHORE PLATFORMS,” JOURNAL OF MARINE ENGINEERING, vol. 11, no. 21, pp. 69–82, 2015, [Online]. Available: https://sid.ir/paper/60806/en

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