Criteria for design offshore platforms generally grouped into two parts. the operational criteria and economic criteria. The most important design criterion is the reliability (Reliability) structure, although the reliability of offshore structures platforms was not the only one who should kritenia design diperhatika, in addition to easy-care, preparation, fabrication cost and even disposability. This reflects that safety - both personnel, environment, and the investment itself partly expressed as a function and reliability of these structures. Although the safety of a rig off the coast is not only determined by the reliability of the structure, the reliability of the structure contributes to the reliability of these maritime engineering system as a whole. This is because the subsystems provide the structure for the placement of the container-subsystem other subsystems. An offshore rig serves to provide a horizontal working areas where humans and various equipment (electrical, mechanical, pneumatic, etc..) Can work normally without being interrupted by the marine environment (water) directly.
Reliability of the structure is determined by external conditions or the loads acting on the bridge structure. In general, the work load of the structure of an offshore rig can be categorized as follows:
I. Burden Dead (Dead loads)
Dead weight is the weight and the dry components and the loads and tools, equipment and machinery that do not change and the mode of operation at an offshore rig, such as dry weight of the structure, heavy drilling equipment and processes, boat landing, risers, bumper boats, etc..
ii. Load Life (Live loads)
The burden of life is a burden that happened at the bridge for use / function and change of operating mode to another mode of operation. Examples of live load, are:
heavy drilling and production equipment that can be added or removed and the bridge, living quarters weight, weight Consumable, etc.. The value of life depends on the load deck function, an average of ~ 3-17 kN/m2
iii. Environmental Burden (Environmental Loads)
Environmental burden is a burden that occurs because the operating environment is affected by or working offshore rigs. Environmental burden can be: the burden of wind, waves, currents, earthquakes, Hydrostatic pressure, load waves.
iv. As a result of an accident burden (Accidental Loads)
The burden is the burden that accidents can not be predicted before going on a bridge. Load accidents can occur as a result of: collisions with ships operating guide, he decided crane rope, she decided rope hooks, fire, explosion, explosion, falling bodies on the deck, etc..
v. Special Expenses (Special Loads)
Special burden is the burden that occurs within a certain time, such as belay and load weight to push the floating bridge, the load due to heat or residual stress from welding work, the burden of manufacturing, the withdrawal load (towing), weight lifting (lifting), launching and transport .
Reliability of the structure is determined by external conditions or the loads acting on the bridge structure. In general, the work load of the structure of an offshore rig can be categorized as follows:
I. Burden Dead (Dead loads)
Dead weight is the weight and the dry components and the loads and tools, equipment and machinery that do not change and the mode of operation at an offshore rig, such as dry weight of the structure, heavy drilling equipment and processes, boat landing, risers, bumper boats, etc..
ii. Load Life (Live loads)
The burden of life is a burden that happened at the bridge for use / function and change of operating mode to another mode of operation. Examples of live load, are:
heavy drilling and production equipment that can be added or removed and the bridge, living quarters weight, weight Consumable, etc.. The value of life depends on the load deck function, an average of ~ 3-17 kN/m2
iii. Environmental Burden (Environmental Loads)
Environmental burden is a burden that occurs because the operating environment is affected by or working offshore rigs. Environmental burden can be: the burden of wind, waves, currents, earthquakes, Hydrostatic pressure, load waves.
iv. As a result of an accident burden (Accidental Loads)
The burden is the burden that accidents can not be predicted before going on a bridge. Load accidents can occur as a result of: collisions with ships operating guide, he decided crane rope, she decided rope hooks, fire, explosion, explosion, falling bodies on the deck, etc..
v. Special Expenses (Special Loads)
Special burden is the burden that occurs within a certain time, such as belay and load weight to push the floating bridge, the load due to heat or residual stress from welding work, the burden of manufacturing, the withdrawal load (towing), weight lifting (lifting), launching and transport .
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