ANALISIS DEFORMASIDAN DAYA DUKUNG TENSION PILE PADA PONDASI TLP
TLPs are unique in that they impose tension loads to their foundation unlike conventional jacket structures which impart compression loads. The TLP concept dictates that the foundation pile are always in tension. The analysis and design of foundation consist of static or pseudostatic and dynamic ana...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/1952 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | TLPs are unique in that they impose tension loads to their foundation unlike conventional jacket structures which impart compression loads. The TLP concept dictates that the foundation pile are always in tension. The analysis and design of foundation consist of static or pseudostatic and dynamic analyses of the soil-interaction with the ultimate goal of determining displacement and bearing capacity under static and cyclic loading. Cyclic loadings developed by environmental conditions such as storm waves and earthquakes. For offshore structures, the cyclic loads was caused by waves forces. This forces produced by the regular (periodic) type of force, although in reality will random. Repetitive loadings can cause a temporary or permanent decrease in load-carrying resistance, and/or an accumulation of deformation. The ultimate pullout capacity of piles can be estimated in a similar manner to ultimate compression capacity. The only difference will be that the endbearing capacity is ignored. The pullout force is resist by the side frictional resistance and the weight of the pile. A well recognized computer program PLAXIS is used for the computational tool. An axisymmetric modeling is used to represent the group of piles. And mohr-coulomb failure criteria is used for soil model. In this research, the analysis is conducted to perform the displacement behaviour of piles under various effect, that is : wave effect (various height and period of waves), depth penetration effect, cohesive soil effect (soft, medium and stiff clay). The result shown that displacement amplitude of piles increases as the height and period of waves increases, also for the depth penetration effect. For various type of clay effect indicate that stiff clay will give deformation increase smaller than soft clay with dynamic time, because displacement of piles is influenced by modulus elastic and poisson's ratio. |
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