Abstract
Abstract This paper studies the two widely used material models for predicting the dynamic behavior of soils, the Ramberg-Osgood and Hadrin-Drnevich models. Resonant column and torsional simple shear test results on dry sand were used to calibrate and evaluate the model built in the finite element software Midas GTS NX. Both material models are already implemented by the software. This study estimates the ability and efficiency of both soil models coupled with the Masing criteria to predict the behavior of soil when subjected to irregular loading patterns, (e.g., earthquakes), and measure the two most important dynamic properties, the dynamic shear modulus, and the damping ratio.
Highlights
The response of structures to dynamic loading is directly dependent on the response of soil beneath or around it
This paper studies the two widely used material models for predicting the dynamic behavior of soils, the Ramberg-Osgood and Hadrin-Drnevich models
The dynamic shear modulus was calculated from these curves and compared as well with the shear modulus degradation curves obtained from RC-TOrsional Simple Shear (TOSS) tests
Summary
The response of structures to dynamic loading is directly dependent on the response of soil beneath or around it. To be able to study the soil-structure interaction numerically with adequate accuracy, it is important to have a material model that is well representative of the soil in the field conditions. This has been a challenge when it comes to irregular loading patterns due to the complex nature of soils’ behavior and its dependence on many factors like the confining stress, void ratio, density and number of cycles, etc. The Ramberg-Osgood and the HardinDrnevich models were used to predict and simulate the soil behavior in the TOrsional Simple Shear (TOSS) test, and the results were compared with test data for irregular loading patterns
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