Displacement Ductility Capacity of a Fixed-Head Pile in Cohesionless Soil

Displacement Ductility Capacity of a Fixed-Head Pile in Cohesionless Soil

This study develops assessment formulas for the displacement ductility capacity of a fixed-head pile in cohesionless soil. The basic structure of these formulas is derived from an ideal model of a semi-infinite pile. This semi-infinite pile has bilinear moment-curvature properties in Winkler-type soils whose stiffness increases with depth(Gibson soil). In these formulas, the displacement ductility capacity of the fixed-head pile is explicitly expressed in terms of the pile-soil system parameters, which include the sectional over-strength ratio, curvature ductility capacity, and a modification factor for soil nonlinearity.