Design of Laterally Loaded Monopiles in Normally to ...
Transcript of Design of Laterally Loaded Monopiles in Normally to ...
Design of Laterally Loaded Monopiles
in Normally to Moderately
Overconsolidated Clays
Asitha Senanayake, Hande Gerkus & Bob GilbertThe University of Texas at Austin
Erica Rendon & Shin-Tower WangEnsoft Inc.
Bob StevensFugro-McClelland Marine Geosciences
Dan O’Connell & Sid FalkBureau of Ocean Energy Management
Objectives
1. Assess Effect of Large Pile Diameters
2. Evaluate Suitability of p-y Curves
3. Investigate Effects of Cyclic Loading
4. Develop Design Recommendations
Pile Diameter
3D FEM Mesh
Pile Diameter
p-y Curves
p-y Curves
D=4-inches
p-y Curves
D=2-inchesD=4-inches
p-y Curves
Marine Clay
p-y Curves
p-y Curves
p-y Curves
54-inch Diameter Pile
New Orleans (2010)
p-y Curves
12.75-inch Diameter Pile
Sabine River (1961)
Cyclic Loading
Cyclic Loading
Cyclic Loading
Conclusions: Laterally Loaded
Monopiles in Normally to Moderately
Overconsolidated Clays
1. Normalizing p-y Curves by Diameter and
Ultimate Lateral Resistance Captures Effect of
Pile Diameter
2. Jeanjean (2009) p-y Curves Fit Laboratory and
Field Data Better than Matlock (1970) Curves
3. Secant Stiffness of Lateral Pile-Soil Response
Degrades by 20% to 30% within about 100
Cycles and then Stabilizes
4. Ultimate Lateral Capacity of a Pile Is Not
Affected by Previous Cyclic Loading
Future Work
1. Laterally Loaded Monopiles in Sand
2. Measuring Small-Strain Stiffness In Situ