Estimating Hardening Soil-Brick model parameters for sands based on CPTU tests and laboratory experimental evidence
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View abstract on PubMed
Summary
This summary is machine-generated.This study simplifies soil modeling by using Cone Penetration Test (CPT-U) data to calibrate the Hardening Soil-Brick model parameters. This approach reduces the need for complex lab tests, improving accuracy for soil-structure interaction analyses.
Area Of Science
- Geotechnical Engineering
- Computational Mechanics
- Soil Physics
Background
- The Hardening Soil-Brick model requires advanced triaxial and oedometric tests for calibration, which are challenging for uncemented sands.
- Accurate soil parameter calibration is crucial for reliable soil-structure interaction (SSI) analyses, especially under varying stiffness conditions.
Purpose Of The Study
- To develop and verify a simplified calibration procedure for the Hardening Soil-Brick model using Cone Penetration Test with pore pressure (CPT-U) data.
- To establish correlations between reference stiffness moduli and CPT-U parameters for enhanced model calibration.
- To propose an improved method for identifying the small strain shear stiffness modulus, even without seismic CPT-U (SCPT-U) data.
Main Methods
- Correlating CPT-U test results with advanced triaxial and oedometric test data.
- Identifying and verifying relationships between various soil stiffness moduli.
- Developing and validating an enhanced procedure for small strain shear stiffness modulus identification using standard CPT-U and SCPT-U data.
Main Results
- A CPT-U based method effectively calibrates key Hardening Soil-Brick model parameters for sands with sufficient accuracy for practical applications.
- Strong correlations with high coefficients of determination were found between reference stiffness moduli and CPT-U derived parameters.
- The proposed enhanced procedure accurately identifies the very small strain shear stiffness modulus, even when seismic CPT-U data is unavailable.
Conclusions
- CPT-U testing offers a practical and accurate alternative for calibrating the Hardening Soil-Brick model, reducing reliance on complex laboratory testing.
- The established correlations provide a robust framework for linking CPT-U data to essential soil stiffness parameters.
- The enhanced method for small strain shear stiffness modulus identification expands the applicability of CPT-U in geotechnical engineering practice.
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