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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
S. Ishwarya1, M. Arockiasamy2 and R. Senthil3
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DOI:10.17265/2159-5879/2016.04.006
Affiliation(s)
1. Division of Structural Engineering, Department of Civil Engineering, Anna University, Chennai, India
2. Department of Civil, Environmental and Geomatics Engineering, Florida Atlantic University, U.S.A.
3. Division of Structural Engineering, Department of Civil Engineering, Anna University, Chennai, India
ABSTRACT
In this study, inelastic
nonlinear pushover analysis is performed on a 3-D model of a jacket-type
offshore platform for the North Sea conditions. The structure is modelled,
analyzed and designed using finite element software SACS (structural analysis
computer system). The behavior of jackets with different bracing systems under
pushover analysis is examined. Further, by varying the leg batter values of the
platform, weight optimization is carried-out. Soil-structure interaction
effect is considered in the analyses and the results are compared with the
hypothetical fixed-support end condition. Static and dynamic pushover analyses
are performed by using wave and seismic loads respectively. From the analyses,
it is found that the optimum leg batter varies between 15 to 16 and 2% of
weight saving is achieved. Moreover, it has been observed that the type of
bracing does not play a major role in the seismic design of jacket platform
considering the soil-structure interaction.
KEYWORDS
Fixed offshore jacket platform, pushover analysis, seismic analysis, leg batter, optimization, SACS.
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