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Bending Stiffness of geosynthetic-reinforced Soil (GRS) Platform
Understanding the homogenous bending stiffness of geosynthetic reinforced soil (GRS) beams and platforms can aid in the design of civil structures that span unstable or compressible soil and subsurface pipe conduits. Despite the increasing use of GRS, GRS beams and platforms bending behavior has received little attention. GRS beams and platforms are typically composed of alternating layers of geosynthetic reinforcement and soil, resting on soft or unstable soil, and are competently supported on either end. This investigation evaluates composite or "homogenized" mass bending stiffness resulting from the inclusion of geosynthetic reinforcement in GRS. Analyses are performed using the two dimensional FEM and the Winkler foundation model. The research consists of two primary analyses. The first was a parametric study to ascertain the influential parameters contributing to the bending stiffness. The second investigated the effect of reinforcement spacing and the number of layers on the GRS stiffness. The research concludes that bending resistance is best gained by decreasing the spacing between reinforcement layers and using higher strength soils. Increasing reinforcement tensile strength also increases bending resistance, but the affect was ancillary to the spacing and soil stiffness. The GRS beams numerically modeled for this study exhibited similar displacement behavior to the Winkler foundation model, indicating that the bending behavior of GRS beams can be analyzed using methods that apply to fundamental concepts of beam bending theory.
Bending Stiffness of geosynthetic-reinforced Soil (GRS) Platform
Understanding the homogenous bending stiffness of geosynthetic reinforced soil (GRS) beams and platforms can aid in the design of civil structures that span unstable or compressible soil and subsurface pipe conduits. Despite the increasing use of GRS, GRS beams and platforms bending behavior has received little attention. GRS beams and platforms are typically composed of alternating layers of geosynthetic reinforcement and soil, resting on soft or unstable soil, and are competently supported on either end. This investigation evaluates composite or "homogenized" mass bending stiffness resulting from the inclusion of geosynthetic reinforcement in GRS. Analyses are performed using the two dimensional FEM and the Winkler foundation model. The research consists of two primary analyses. The first was a parametric study to ascertain the influential parameters contributing to the bending stiffness. The second investigated the effect of reinforcement spacing and the number of layers on the GRS stiffness. The research concludes that bending resistance is best gained by decreasing the spacing between reinforcement layers and using higher strength soils. Increasing reinforcement tensile strength also increases bending resistance, but the affect was ancillary to the spacing and soil stiffness. The GRS beams numerically modeled for this study exhibited similar displacement behavior to the Winkler foundation model, indicating that the bending behavior of GRS beams can be analyzed using methods that apply to fundamental concepts of beam bending theory.
Bending Stiffness of geosynthetic-reinforced Soil (GRS) Platform
Gemperline, Christopher M. (author)
2013
10 Seiten, Bilder, Tabellen, Quellen
Conference paper
Storage medium
English
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