Inelastic Seismic Response of Bridge Drilled-Shaft RC Pile/Columns
Publication: Journal of Structural Engineering
Volume 126, Issue 4
Abstract
An analytical model based on a Winkler beam is used to represent the lateral force response of a reinforced concrete (RC) pile in cohesionless soil. An inelastic finite-element analysis was performed on the structure, using as the pile constitutive model the section moment-curvature relationship based on confined stress-strain relationships for the concrete. Parameters varied were pile head restraint (free and fixed head), height of pile head above grade level, and soil stiffness. Linear, bilinear, and hyperbolic soil models were examined. The analysis showed that shear would be significantly underpredicted by an elastic analysis, as inelastic behavior moved the point of maximum moment in the pile shaft closer to the surface, thus reducing the shear span. Maximum moment depth in the pile shaft and plastic hinge length were also shown to be strongly dependent on soil stiffness, and in the case of fixed-head piles, on abovegrade height of the superstructure. Linear soil models were shown to be adequate for most cases of pile/column design.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 126 • Issue 4 • April 2000
Pages: 510 - 517
History
Received: Mar 10, 1999
Published online: Apr 1, 2000
Published in print: Apr 2000
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