Sensitivity Analysis of Factors Affecting the Bearing Capacity of Suction Bucket Foundation in Soft Clay
Abstract
:1. Introduction
2. Establishment the Numerical Model
2.1. Overview of the Model
2.1.1. Parameters of the Model
2.1.2. Mesh
2.1.3. Interaction between Contact Surfaces
2.1.4. Initial Geo–Stress Balance
2.2. Expression of Load
2.3. Determination of Horizontal Cyclic Load
2.4. Verification of Finite Element Model
3. Results
3.1. Bearing Capacity Characteristics with Different Length-Diameter Ratios
3.2. Bearing Capacity Characteristics with Different Soil Non-Uniformity Coefficients
3.3. Bearing Capacity Characteristics with Different Angles between Wind and Wave Loads
3.4. Bearing Capacity Characteristics with Different Number of Cycles
4. Discussion
4.1. Sensitivity Analysis of Factor in Length–Diameter Ratios
4.2. Sensitivity Analysis of Factor in Soil Non-Uniformity Coefficients
4.3. Sensitivity Analysis of Factor in Angles between Wind and Wave Loads
4.4. Sensitivity Analysis of Factor in Number of Cycles
5. Conclusions
- The relationship between the horizontal bearing capacity coefficient and the length-diameter ratio and the soil unevenness coefficient has been established through numerical simulation, and the results show that the length–diameter ratio and the unevenness coefficient are positively correlated to the horizontal bearing capacity coefficient.
- When the length–diameter ratio of suction bucket is less than 1.0, the influence of the soil non-uniformity coefficient on the bearing capacity of the suction bucket foundation is greater than length–diameter ratio.
- When the length–diameter ratio of the suction bucket is more than 2.0, the influence of soil non-uniformity coefficient on the bearing capacity of the suction bucket foundation gradually diminishes.
- When the angle between wind and wave loads is 15° to 30°, the bearing capacity of the suction bucket foundation is lower than the bearing capacity when the wind and wave loads are collinear.
- The attenuation of soil strength is rapid within 60 cycles. Because the shallow soil layer is the primary provider of horizontal bearing capacity during the initial cycles, the rate of strength attenuation in the shallow soil is faster than that in the deep soil under initial cyclic loads.
- The attenuation of soil strength is slow after 100 cycles. Because the strength of shallow soil is relatively stable after 100 cycles, the reason for the subsequent slow strength attenuation is that the strength of deep soil decreases.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Parameters | Elasticity Modulus/GPa | Poisson’s Ratio | Effective Weight/(KN·m−3) |
---|---|---|---|
Bucket | 210 | 0.125 | 23 |
Parameters | Elasticity Modulus | Poisson’s Ratio | Effective Weight/(KN·m−3) | Cohesive Force/KPa | Internal Friction Angle/(°) | Dilatancy Angle/(°) |
---|---|---|---|---|---|---|
Soil | 500Su | 0.49 | 8 | 20 | 15 | 0.1 |
K = pD/Su0 | p/(kPa·m−1) | Su0/kPa |
---|---|---|
0 | 0 | 5 |
1 | 1 | 5 |
2 | 1.5 | 7.5 |
5 | 2 | 4 |
10 | 2.5 | 2.5 |
Working Conditions | Wind Loading Direction | Wave Loading Direction |
---|---|---|
A | 0° | 0° |
B | 0° | 15° |
C | 0° | 30° |
D | 0° | 45° |
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Wang, B.; Yuan, M.-H.; Li, L.; Yuan, C.-F.; Li, Y.; Shen, K.-M. Sensitivity Analysis of Factors Affecting the Bearing Capacity of Suction Bucket Foundation in Soft Clay. Sustainability 2022, 14, 9615. https://doi.org/10.3390/su14159615
Wang B, Yuan M-H, Li L, Yuan C-F, Li Y, Shen K-M. Sensitivity Analysis of Factors Affecting the Bearing Capacity of Suction Bucket Foundation in Soft Clay. Sustainability. 2022; 14(15):9615. https://doi.org/10.3390/su14159615
Chicago/Turabian StyleWang, Bin, Ming-Hui Yuan, Liang Li, Chang-Feng Yuan, Ying Li, and Kan-Min Shen. 2022. "Sensitivity Analysis of Factors Affecting the Bearing Capacity of Suction Bucket Foundation in Soft Clay" Sustainability 14, no. 15: 9615. https://doi.org/10.3390/su14159615