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Recent Development of Floating Structures
in Japan by use of Rubber Fenders for
Mooring 7th February 2012
Shigeru UEDAS. UEDA
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
S. UEDA MTEC 2007 2 7 /09/2007
c) Dolphin and Fenders
b) Tension Legs
d) J acket, Pile and Fenders
a) Chain, Cable and Anchor, Sinker
Station Keeping Systems of Floating Structure
c) Dolphin and Fendersc) Dolphin and Fenders
b) Tension Legsb) Tension Legs
d) J acket, Pile and Fendersd) J acket, Pile and Fenders
a) Chain, Cable and Anchor, Sinkera) Chain, Cable and Anchor, Sinker
Station Keeping Systems of Floating Structure
S. UEDA S. UEDA
S. UEDA
S. UEDA
S. UEDA
S. UEDA
Lacey Murrow Bridge
S. UEDA
Food Canal
S. UEDA
Bergsoysund Bridge
S. UEDA
S. UEDA
Nordhordland Bridge
S. UEDA
S. UEDA
Rubber Fender
S. UEDA
National Oil Stockpiling Kamigoto Base
S. UEDA
S. UEDA
S. UEDA
S. UEDA
S. UEDA
S. UEDA
Kamigotou oil strageL 390mB 97mD 27.6mFenderC3000X8C2250X4
Shirashima oil strageL 397mB 82mD 25.4mFenderC2500X16
S. UEDA
S. UEDACourtesy of Osaka Shinbun
S. UEDA
S. UEDA
Yume Mai BridgeL 410mB 33.8m
FenderSUC2500X24
S. UEDA
S. UEDACourtesy of Osaka Shinbun
S. UEDA Courtesy of Osaka Shinbun
Design of ConnectionFinger Joint
Modular JointRubber Joint
Rolling Leaf Joint
S. UEDA
S. UEDA
S. UEDA
S. UEDA
Final Unit Jointed 1999
S. UEDACourtesy of Asahi Shinbun
Mega Float Ph-1 1995-1997 300m×60m×2mPh-2 1998-2000 1000m×121m× 3 m
Phase-2
S. UEDA Courtesy of Okamura
S. UEDA Courtesy of Asahi Shinbun
Pavement
Fender
Steel J acket
Steel Pipe Pile
Fig. 5.4 Jacket Type Dolphin and Fender System
S. UEDA
S. UEDA
Figure 3 Load-Deflection Characteristics of Rubber Fender
0
100
200
300
400
500
600
0 10 20 30 40 50Compression Strain(% )
Rea
ctio
n Fo
rce
N)
(k
SUC1000HRH
Deflection against
Steady force 10% Allowable Deflection 35%
Rated Deflection
S. UEDA
Creep (Static , Dynamic)Load-Deflection Characteristics under
Repeated LoadVelocity and Temperature Factor
Deterioration
S. UEDA
0.0
0.2
0.4
0.6
0.8
1.0
1.2
Number of Compression cycles
Rea
ctio
n F
orce
Rat
io
100H(RH)50%NO.1100H(RH)50%NO.2100H(RH)20%NO.1100H(RH)20%NO.2630H(RH)30%100H(RH)52.5%630H(RH)20%
10 102 10
310
410
510
610
71
Repeated compression characteristics of the rubber fender
S. UEDA
Temperature factor
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
0 10 20 30 40 50 60
Compression Strain (%)
Tem
pera
ture
Fac
tor
-20℃ 0℃
60℃
40℃
20℃
S. UEDA
0
0.2
0.4
0.6
0.8
1
1.2
1.4
0 10 20 30 40 50 60
Compression Strain (%)
Velo
city
Facto
r
1%/s
0.0533%/s
0.25%/s
3%/s
18.75%/s
37.5%/s
48%/s
100%/s
Velocity factor
S. UEDA
0
5
10
15
20
25
0 100 200 300 400 500 600 700
Time Elapse (min.)
Com
pres
sion
Stra
in (%
)
100H Initial Strain 8%
1000H Initial Strain 8%
100H Initial Strain 10%
1000H Initial Strain 10%
100H Initial Strain 12%
1000H Initial Strain 12%
100H Initial Strain 17%
Static Creep
Initial Strain SUC1000H SUC100H
8 % 9.5 % 9.8 %
10 % 12.3 % 11.9 %
12 % 14.3 % 15.1 %
17 % - 23.3 %S. UEDA
0
0.2
0.4
0.6
0.8
1
1.2
1.4
0 5 10 15 20 25 30 35 40
Reacti
on
Fo
rce R
ati
o
Standard Performance
Compression Strain(%)
C A’A
D’
C’
B’B
Compression Strain
Reaction Force
Compression StrainS. UEDA
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 – 1.05
Aging 1.00 – 1.05 1.00 – 1.05
Velocity factor 1.00 – 1.10 1.00 – 1.05
Creep 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
compression
0.8 – 0.9 (at 40% deflection
repeated for more than 10
cycles)
0.9 – 1.0 (at 20% deflection
repeated for more than 10
cycles)
Inclination
compression
Load-deflection characteristics
in consideration of the lateral
force as 10% of the axial force
0.95 – 1.00
Temperature factor 0.95 – 1.25 (at 0 – 50oC) 0.95 – 1.25 (at 15 – 45oC)
S. UEDA
National Oil Stockpiling Kamigoto Base
Thank you very muchfor your patience
S. UEDA