Reliability Analysis of Tensile Crack Resistance in High Asphalt Core Based on Mixed-Level Uniform Design and Response Surface Method
Publication: International Journal of Geomechanics
Volume 23, Issue 2
Abstract
For embankment dams over 150 m in height, there is a strong tensile effect on the core near the bank slope under the action of water storage. The cracking of the core due to tension can threaten the overall safety of the dam. Therefore, it is very crucial to perform a reliability analysis of the tensile crack resistance of a high asphalt core. In this study, the tensile crack of the core is considered the basis of failure. Taking the ultimate tensile strain as the control index, a calculation method is established for the crack resistance reliability of a high embankment dam core based on a mixed-level uniform design (MLUD) and the response surface method (RSM). Considering the Duncan–Chang E-B model parameters, the random variables for the reliability calculation assessment are determined by the single-factor sensitivity analysis method. Based on the combination of the MLUD and the RSM, the explicit expression of the core strain is derived. Further, the checking point (JC) method is used to evaluate the performance of the core. The Quxue dam with a dam height of 171.2 m is used as an engineering example for verification. The results show that the random variables K, n, and φ, and the upstream water level H are highly sensitive parameters. The core crack resistance reliability index β is 4.2695, which is greater than the standard reliability index. The calculated results are in good agreement with the collected actual measurement results.
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Acknowledgments
The work was supported by the China National Funds for Distinguished Young scientists (Grant No. 5212500586) and the National Natural Science Foundation of China (Grant No. 51979224). The authors thank these organizations for the financial support to perform this research.
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Information & Authors
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Published In
International Journal of Geomechanics
Volume 23 • Issue 2 • February 2023
Copyright
© 2022 American Society of Civil Engineers.
History
Received: May 31, 2022
Accepted: Aug 29, 2022
Published online: Nov 16, 2022
Published in print: Feb 1, 2023
Discussion open until: Apr 16, 2023
ASCE Technical Topics:
- Analysis (by type)
- Continuum mechanics
- Cracking
- Dams
- Design (by type)
- Embankment dams
- Engineering fundamentals
- Engineering mechanics
- Fracture mechanics
- Geotechnical engineering
- Load and resistance factor design
- Load factors
- Material mechanics
- Materials engineering
- Mathematics
- Parameters (statistics)
- Probability
- Sensitivity analysis
- Solid mechanics
- Statistics
- Strain
- Structural design
- Water and water resources
- Water management
- Water storage
- Water supply
- Water supply systems
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