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Empirical relationships from the literature are utilized to generate nonlinear soil/rock springs when using beam-on-nonlinear Winkler foundation methodologies. Three parameters are crucial in creating these curves: pile dimensions, soil properties, and depth below the ground surface. Moreover, the soil resistance curves are generally derived in a force per unit length or force per unit area format. For instance, p-y curves are derived on the basis of force/length vs. displacement, and t-z curves are derived on the basis of force/area vs. displacement. At the depth below the ground surface where soil resistance is modeled, the geometry of the pile and the properties of the soil play a critical role in the production of soil curves. More specifically, for every unique pile geometry and for every node along the pile in the corresponding finite element model, a unique set of calculations must be carried out to generate nonlinear soil resistance curves that attach to said node.

OpenBrIM utilizes soil sets to generate nonlinear soil resistance curves on each Pile/Pile Group. The Soil Set definition, when paired with the Pile/Pile Group, ensures that the appropriate pile geometry and soil properties are matched. Therefore, for every Pile/Pile Group, there must be a unique Soil Set definition.

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Soil Layers: Enter the list of soil layers.

Water Table Elevation: This parameter specifies the global elevation of the water table. Suppose the vertical profile of the alignment is defined, value of the Water Table Elevation has to be entered accordingly.

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