A protective cushion layer sandwiched between a gravity type caisson and the surrounding soil can improve the seismic stability of the caisson. In this paper, an interaction model was developed for analyzing such structure under earthquake loading. Interfaces on either side of the cushion were modeled as elements of finite thickness having different stiffness and constitutive properties. Participation from each element of the interaction system was taken into the account by incorporating appropriate factors at the respective interfaces. Seismic analyses were performed on a gravity-type caisson subjected to an actual earthquake motion. Comparison of the analysis results with a similar caisson without any protective cushion showed that the use of cushion yields a significant reduction of seismic load on the structure.
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ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering
June 12–17, 2005
Halkidiki, Greece
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
0-7918-4195-2
PROCEEDINGS PAPER
On Stability Improvement of Gravity Type Onshore and Offshore Structures Available to Purchase
Hemanta Hazarika
Hemanta Hazarika
Port and Airport Research Institute, Yokosuka, Japan
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Hemanta Hazarika
Port and Airport Research Institute, Yokosuka, Japan
Paper No:
OMAE2005-67283, pp. 567-572; 6 pages
Published Online:
November 11, 2008
Citation
Hazarika, H. "On Stability Improvement of Gravity Type Onshore and Offshore Structures." Proceedings of the ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering. 24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 1, Parts A and B. Halkidiki, Greece. June 12–17, 2005. pp. 567-572. ASME. https://doi.org/10.1115/OMAE2005-67283
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