concepción, enero del 2008 felipe villalobos universidad
TRANSCRIPT
![Page 1: Concepción, Enero del 2008 Felipe Villalobos Universidad](https://reader036.vdocuments.us/reader036/viewer/2022072820/62e1efdc10aedd299c3e5217/html5/thumbnails/1.jpg)
FOUNDATIONS FOR OFFSHORE WIND TURBINES
Concepción, Enero del 2008Felipe Villalobos
Universidad Católica de la Santísima Concepción
http://www.kentishflats.co.uk
![Page 2: Concepción, Enero del 2008 Felipe Villalobos Universidad](https://reader036.vdocuments.us/reader036/viewer/2022072820/62e1efdc10aedd299c3e5217/html5/thumbnails/2.jpg)
Offshore wind energy in Europe
Arklow Bank
Blyth
North Hoyle
Barrow
Scroby Sands
Kentish Flats
Frederikshavn
Horns RevSamsø
Ems-EmdenIrene Vorrink
Lely
Nysted
MiddelgrundenYttre Stengrund
Utgrunden
http://www.offshorewindenergy.org
![Page 3: Concepción, Enero del 2008 Felipe Villalobos Universidad](https://reader036.vdocuments.us/reader036/viewer/2022072820/62e1efdc10aedd299c3e5217/html5/thumbnails/3.jpg)
The foundation problem
http://www.kentishflats.co.uk
?
?
???
Environmental Forces:
Waves + Wind + Currents
Gravity
![Page 4: Concepción, Enero del 2008 Felipe Villalobos Universidad](https://reader036.vdocuments.us/reader036/viewer/2022072820/62e1efdc10aedd299c3e5217/html5/thumbnails/4.jpg)
Gravity base and pile foundations
Gravity base foundation being floated out to TunoeKnob Photograph © 1996 by Flemming Hagensen
Limited by sea depth (< 10 m) and turbine size (< 3 MW)
Monopile foundation at Kentish FlatsGravity base foundations at Nysted
![Page 5: Concepción, Enero del 2008 Felipe Villalobos Universidad](https://reader036.vdocuments.us/reader036/viewer/2022072820/62e1efdc10aedd299c3e5217/html5/thumbnails/5.jpg)
For larger turbines (> 4 MW) foundation sizes and time increase considerably
Ems Emden 4.5 MW turbine
![Page 6: Concepción, Enero del 2008 Felipe Villalobos Universidad](https://reader036.vdocuments.us/reader036/viewer/2022072820/62e1efdc10aedd299c3e5217/html5/thumbnails/6.jpg)
Suction caissons
ROV pump(remote operated vehicles)
valve
3 m diameter suction caisson
12 m diameter suction caisson
![Page 7: Concepción, Enero del 2008 Felipe Villalobos Universidad](https://reader036.vdocuments.us/reader036/viewer/2022072820/62e1efdc10aedd299c3e5217/html5/thumbnails/7.jpg)
Research programme
Theoretical analyses
Laboratory model tests
Field trials
100 m
30 m
4 MN
90 m6 MN
Trials and monitoring offshore
![Page 8: Concepción, Enero del 2008 Felipe Villalobos Universidad](https://reader036.vdocuments.us/reader036/viewer/2022072820/62e1efdc10aedd299c3e5217/html5/thumbnails/8.jpg)
Experimental procedures
![Page 9: Concepción, Enero del 2008 Felipe Villalobos Universidad](https://reader036.vdocuments.us/reader036/viewer/2022072820/62e1efdc10aedd299c3e5217/html5/thumbnails/9.jpg)
Installation results
0
20
40
60
80
100
120
140
0 500 1000 1500 2000Vertical loads, V' and V' + S (N)
Ski
rt pe
netra
tion,
h (m
m)
V' = 60 N
V'V' + S
by suction
by pushing
-The use of suction reduces the net vertical load required to install a caisson
-This is possible due to the hydraulic gradients created by the application of suction
![Page 10: Concepción, Enero del 2008 Felipe Villalobos Universidad](https://reader036.vdocuments.us/reader036/viewer/2022072820/62e1efdc10aedd299c3e5217/html5/thumbnails/10.jpg)
Yield surface fromload-displacement response
Vo V
M/2R or H
Vt
M/2R or H
V2V1 V3
V3
Yield point
2R or u
V1
V2
w
V1V2
V3
L
y3y2y1
![Page 11: Concepción, Enero del 2008 Felipe Villalobos Universidad](https://reader036.vdocuments.us/reader036/viewer/2022072820/62e1efdc10aedd299c3e5217/html5/thumbnails/11.jpg)
Final Comments- The foundation design is governed by the harsher
and cyclic nature of loading conditions offshore- Suction caisson foundations might become an
option, in particular for large wind turbines - Beneficial effect in the monotonic and cyclic
response of the caisson when the vertical load increases
- Results to be used in the construction of a hyperplasticity model
![Page 12: Concepción, Enero del 2008 Felipe Villalobos Universidad](https://reader036.vdocuments.us/reader036/viewer/2022072820/62e1efdc10aedd299c3e5217/html5/thumbnails/12.jpg)
http://www.civil.ucsc.cl [email protected]