Abstract
The rockfill is modeled as nonlinear elastic material, whose stress-dependent tangent modulus is related to the confining pressure. The parameters of constitutive relationship of stress and strain are determined by tri-dimensional compression test in laboratory. The model applied in this study adopts the technique of element birth and death to simulate the sequential impoundment process of concrete-faced rockfill dam with time. Nonlinear finite element method is used to simulate the prototype behavior of various components of the dam in sequential nonlinear analysis and some representative results are presented.
Highlights
Rockfill has been used in the construction of dams for over 150 years [1]
This study provided the opportunities for further understanding the behaviors of concrete-faced rockfill dam (CFRD) with weak rocks [6]
Duncan EB model is employed to describe the non-linearity of rockfill materials
Summary
The concrete-faced rockfill dam (CFRD) was used with increasing frequency in recent years, in many parts of the world. The behavior of the rockfill materials is affected by such factors as mineralogical composition, particle grading, size and shape of particles, and stress conditions [2]. A parametric study of transition (supporting) zone stiffness was performed using a numerical model calibrated using the centrifuge results. The numerical results indicated that face slab deformation is more. Zhang influenced by transition zone stiffness than face slab stiffness, supporting the centrifuge results [4]. Khalid carried out studies in order to understand the prototype behavior of this type of rockfill dam and to identify the various factors influencing the development of stresses and strains in the face slab and the rockfill embankment [5]. The stress and deformation distributions are shown in the section
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