Evaluation of hardening soil model on numerical simulation of behaviors of high rock fill dams
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Publication Details
Author list: Pramthawee P., Jongpradist P., Kongkitkul W.
Publisher: Prince of Songkla University
Publication year: 2011
Journal: Songklanakarin Journal of Science and Technology (SJST) (0125-3395)
Volume number: 33
Issue number: 3
Start page: 325
End page: 334
Number of pages: 10
ISSN: 0125-3395
Languages: English-Great Britain (EN-GB)
Abstract
With the continual increase in the height of concrete face rock fill dams constructed during this decade, the hyperbolic elastic model conventionally used in the numerical analyses of lower-height rock fill dams in the past practice becomes insufficient to reproduce the key responses of rock fills of high dam constructions and impoundments. This research aims at evaluating the ability of the elasto-plastic with isotropic hardening (HS) model for simulating more realistic responses in the analysis of high concrete face rock fill dams. The HS model and, for comparison, the hyperbolic elastic model are numerically implemented into a finite element program ABAQUS through the user subroutine to analyze the behaviors of rock fills under construction of a 182 m high dam. To obtain the reliable parameters in the analyses, the laboratory triaxial testing data of rock fills from actual construction are adopted and the calibration by model simulation is also conducted. The analysis results from both models are compared to the high-quality instrumented data of dam construction. It is proven that by using the HS constitutive model with the appropriately calibrated model parameters, the response of the rock fills under dam construction condition can be more accurately simulated.
Keywords
Constitutive model, Hardening Soil model, High rockfill dam, Shear dilatancy
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