A Structural Feasibility Study on a Concrete Large Floating Structure
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Accession number;06A1016248
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| Title;A Structural Feasibility Study on a Concrete Large Floating Structure |
| Author;
IIJIMA KAZUHIRO
(Osaka Univ.)
KIM YASUNOBU
(Osaka Univ.)
YAO TETSUYA
(Osaka Univ.)
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Journal Title;Kaiyo Kogaku Shinpojiumu (CD-ROM)
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Journal Code:S0108B
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ISSN:
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VOL.19th;NO.;PAGE.ROMBUNNO.16(2006)
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| Figure&Table&Reference;FIG.10, TBL.5, REF.7 |
| Pub. Country;Japan |
| Language;English |
| Abstract;A structural feasibility of a concrete large floating structure is discussed. So far, various large floating structures have been proposed. Most of them are planned to be steel-made, however, few are concrete-made. Concrete material has an advantage over steel in its long durability, which is indispensable as a material for infrastructure. In this study, a concrete floating structure targeted at a container terminal is studied. The dimension of the structure is 700m long and 350m wide. Firstly, concrete platings with steel reinforcements are designed against local pressures under design waves. Longitudinal strength as a ship-beam is also considered using a beam-on-elastic foundation model. From this early stage design, it is also decided to employ PC (Pre-stressed Concrete) for longitudinal members. Then, structural response under the design waves, self-weight, buoyancy forces, static loadings such as gantry cranes and container cargoes are investigated using hydrodynamic-structural coupled analysis code VODAC (Very large floating structures Oriented Dynamic Analysis Code). Based on these numerical results, the final scantlings and the arrangement of PC cables are decided. The magnitude of pre-stresses in the cables are set up so that tensile loads do not work in the concrete and that the concrete in compression do not collapse due to yielding. It is finally shown that the concrete large floating structure is feasible from the structural engineer's viewpoint. (author abst.) |
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