Unified Modeling of Monotonic and Cyclic Behavior of Interface Between Structure and Gravelly Soil

Abstract

This paper describes an elasto-plasticity damage model, termed the EPDI model, of the interface between a structure and gravelly soil. The formulations are derived on the basis of a new model framework, with test-basis concepts and assumptions, for a uniˆed description of monotonic and cyclic behavior of such an interface. The model parameters, with physical meaning, are easily determined from a group of cyclic shear tests and a conˆning compression test. The comparisons of model predictions with the results for a series of tests under varying loading conditions demonstrate that the EPDI model is eŠective in accurate description of monotonic and cyclic stress-strain relationship of the interface between a structure and gravelly soil with capturing new features, including: 1) shear stress-strain relationship and comprehensive volumetric strain response (e.g., partly dependent on shear strain); 2) volumetric strain response that is dependent on the shear direction; and 3) evolution of behavior of the interface associated with the evolution of physical state.

Dynamic damage evaluation on the slabs of the concrete faced rockfill dam with the plastic-damage model

“…The interfaces between the concrete slabs and cushion gravel were investigated experimentally by Zhang and Zhang [35]. The elastic-perfectly-plastic interface model parameters were calibrated using their test results and are listed in Table 2 [10].…”

Three-dimensional seismic response analysis of a concrete-faced rockfill dam on overburden layers

“…The Poisson's ratio and elastic module are 0.167 GPa and 28 GPa, respectively. The Tsinghua elasto-plastic damage interface model [14] is used to simulate the behavior of the interface elements, mud elements and sediment elements described above. The model parameters are also obtained based on test results and listed in Table 2, in which interface No.1 refers to the interface between face slab and cushion layer, and interface No.2 refers to the interface between overburden layer and the toe slab, and between overburden layer and the connection slab.…”

Monotonic and cyclic modeling of interface between geotextile and gravelly soil

“…The framework of the EPDI model was modified based on the fundamental rules and deformation mechanism of the interface between a geotextile and gravelly soil 1. The basic assumptions of the original EPDI model 12 were maintained and briefly illuminated as follows: (1) The interface has a thickness that is invariable, and the strain of the interface is assumed to be constant using the following equation: where t is the thickness of the interface, γ and ε v are shear strain and volumetric strain, u and v are tangential and normal displacements, respectively. (2) The elastic and plastic strains are always induced by stress simultaneously.…”

“…Zhang and Zhang described an elasto‐plasticity damage model, termed the EPDI model, on the basis of understanding the behavior and deformation mechanisms of the interface between a steel plate and gravelly soil 12. This model has been confirmed by various tests to accurately capture the monotonic and cyclic stress–strain relationship of the interface, including the comprehensive volumetric response that depends on the shear direction and evolution of behavior associated with changes in the physical state.…”