Improvement of the structure of floating docks based on the study into the stresseddeformed state of pontoon
Keywords:floating composite dock, dock construction technology, reinforced-concrete sections, pontoon, strength of reinforced-concrete slabs
We have investigated the stressed-deformed state of reinforced concrete slabs of the composite dock pontoon with a reduced number of framing sets. A refined estimation scheme was applied in the calculation of bending plates of the slipway-deck and pontoon bottom, which accounts for the work of reinforcement structure in both directions. Accounting for the work of reinforcement structures in both directions makes it possible to accurately estimate the structural strength and provide recommendations on their design in terms of material consumption and optimal size. When modeling work of concrete, we took into consideration that concrete at stretching has a less rigidity for stretching than for compression.
It has been shown that the developed design and construction technology of the composite dock with a reduced number of framing sets in the pontoon makes it possible to expand the technological capabilities of dock construction. The results derived from the calculations of cumulative stresses in the slabs of the dock's pontoon stack-deck showed that the actual safety factors meet the requirements for strength. Given that the structure of concrete slabs perceives the moment of resistance that is several times larger than that of steel, it becomes possible to increase the span of a slab and to erect less supports-bulkheads. The result would be the reduced material costs and the decreased labor intensity of operations at dock construction.We have proposed a structure and a construction technology for a composite dock with a reduced number of framing sets in the pontoon. It has been shown that the erection of transverse bulkheads between the inner boards in 4 quadrats, that is, in 3 meters, as well as the absence of lack frames, and floors and beams, in concrete towers, makes it possible to reduce the amount of materials, as well as bring down the labor intensity of dock construction. This paper lists features for the selection of shipbuilding concrete intended to withstand extreme operating conditions of marine reinforced-concrete structures
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Copyright (c) 2018 Oleksandr Shchedrolosiev, Leontiy Korostylov, Serhii Klymenkov, Oleksandr Uzlov, Kostiantyn Kyrychenko
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