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Floating structures

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Floating structures

  1. 1. Recent Development of Floating Structures in Japan by use of Rubber Fenders for Mooring    7 th February 2012 Shigeru UEDA S.   UEDA  
  2. 2. Design of Mooring System Methods of Mooring System1) Chain, Cable , Anchor , Sinker2) Tension Leg3) Dolphin and Rubber Fenders4) Jacket , Pile and Rubber Fenders External Forces1) Wind2) Waves, Wave Drift Force3) Current4) Seismic load Motions and Mooring Forces are calculated by Numerical Simulation S.   UEDA  
  3. 3. a) Chain, Cable and Anchor, Sinker b) Tension Legs c) Dolphin and Fenders d) Jacket, Pile and Fenders Station Keeping Systems of Floating Structure S.   UEDA   UEDA 2007     7 /09/2007 S.   UEDA 2 S.   MTEC   S.   UEDA  
  4. 4. S.   UEDA  
  5. 5. S.   UEDA  
  6. 6. S.   UEDA  
  7. 7. Lacey Murrow Bridge S.   UEDA  
  8. 8. ood  anal S.   UEDA
  9. 9. Bergsoysund Bridge S.   UEDA  
  10. 10. S.   UEDA  
  11. 11. Nordhordland BridgeS.   UEDA  
  12. 12. S.   UEDA  
  13. 13. Rubber Fender  UEDA  
  14. 14. ational Oil Stockpiling Kamigotoase S.   UEDA  
  15. 15. S.   UEDA  
  16. 16. S.   UEDA  
  17. 17. S.   UEDA  
  18. 18. S.   UEDA  
  19. 19. S.   UEDA  
  20. 20. Kamigotou oil strageL 390m Shirashima oil strage L 397 mB 97m B 82mD 27.6m D 25.4mFender FenderC3000X8 C2500X16C2250X4 S.   UEDA
  21. 21. Courtesy of Osaka ShinbunS.   UEDA
  22. 22. S.   UEDA
  23. 23. S.   UEDA  
  24. 24. Yume Mai Bridge L 410m B 33.8m Fender SUC2500X24S.   UEDA
  25. 25. Courtesy of Osaka ShinbunS.   UEDA
  26. 26. S.   UEDA   Courtesy of Osaka Shinbun
  27. 27. Design of Connection Finger Joint Modular Joint Rubber Joint Rolling Leaf Joint S.   UEDA  
  28. 28. S.   UEDA  
  29. 29. S.   UEDA  
  30. 30. S.   UEDA  
  31. 31. Final Unit Jointed1999 S.   UEDA Courtesy of Asahi Shinbun
  32. 32. Mega   Float  Ph-1  1995-1997  300m×60m×2mPh-2  1998-2000 1000m×121m× 3 m Phase-2 S.   UEDA   Courtesy of Okamura
  33. 33. S.   UEDA Courtesy of Asahi Shinbun
  34. 34. Pavement FenderSteel Jacket S.   UEDA   Steel Pipe Pile
  35. 35. S.   UEDA  
  36. 36. 600 500 SUC1000HRHRe a c tion Fo rc e (k N) 400 300 200 Deflection against Steady force 10% Allowable Deflection 35% 100 Rated Deflection 0 0 10 20 30 40 50 Co m pre s s ion St ra in (%) Figure 3 Load-Deflection Characteristics of Rubber Fender S.   UEDA
  37. 37. Creep (Static , Dynamic) Load-Deflection Characteristics under Repeated Load Velocity and Temperature Factor DeteriorationS.   UEDA  
  38. 38. Repeated compression characteristics of the rubber fender 1.2 1.0 Reaction Force Ratio 0.8 0.6 100H(RH)50%NO.1 0.4 100H(RH)50%NO.2 100H(RH)20%NO.1 100H(RH)20%NO.2 0.2 630H(RH)30% 100H(RH)52.5% 630H(RH)20% 0.0 2 3 4 5 6 7 1 10 10 10 10 10 10 10 Numb e r o f C o mp re s s io n c yc le s S.   UEDA  
  39. 39. Temperature factor 1.6 1.4 -20℃ 0℃ 20℃ 1.2 1Temperature Factor 0.8 0.6 40℃ 0.4 60℃ 0.2 0 0 10 20 30 40 50 60S.   UEDA   Compression Strain (%)
  40. 40. Velocity factor 1.4 1.2 1%/s 0.0533%/s 1 0.25%/s Velocity Factor 0.8 3%/s 0.6 18.75%/s 0.4 37.5%/s 0.2 48%/s 0 100%/s 0 10 20 30 40 50 60 Compression Strain (%)S.   UEDA  
  41. 41. Static Creep 25 100H Initial Strain 8% 20 1000H Initial Strain 8% 100H Initial Strain 10% Compression Strain (%) 15 1000H Initial Strain 10% 10 100H Initial Strain 12% 1000H Initial Strain 12% 5 100H Initial Strain 17% 0 0 100 200 300 400 500 600 700 Initial Strain SUC1000H SUC100H 8% 9.5 % 9.8 % 10 % 12.3 % 11.9 % Time Elapse (min.) 12 % 14.3 % 15.1 %S.   UEDA   17 % - 23.3 %
  42. 42. BReac B’tion A C A’For C’ce D’ Compression Strain Standard Performance Compression Strain(%) S.   UEDA Compression Strain
  43. 43. Table 5.1 Variation of reaction force against the nominal load-deflection characteristics Oil Stockpiling Station (1999) Yume-Mai Bridge (2002)Manufacturing error 0.90 – 1.10 0.95 – 1.05Aging 1.00 – 1.05 1.00 – 1.05Velocity factor 1.00 – 1.10 1.00 – 1.05Creep The steady load or the mean load shall be less than the reaction force at 10% strain, and to use the load-deflection characteristics in consideration of creep.Repeated 0.8 – 0.9 (at 40% deflection 0.9 – 1.0 (at 20% deflectioncompression repeated for more than 10 repeated for more than 10 cycles) cycles)Inclination Load-deflection characteristicscompression in consideration of the lateral 0.95 – 1.00 force as 10% of the axial forceTemperature factor 0.95 – 1.25 (at 0 – 50oC) 0.95 – 1.25 (at 15 – 45oC) S.   UEDA  
  44. 44. ational Oil Stockpiling Kamigotoase Thank you very much for your patience S.   UEDA

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