INELASTIC SEISMIC RESPONSE OF BRIDGE DRILLED-SHAFT RC PILE/COLUMNS

An analytical model based on a Winkler beam is used to represent the lateral force response of a reinforced concrete (RC) pile in a 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 above-grade height of the superstructure. Linear soil models were shown to be adequate for most cases of pile/column design.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339445
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Budek, A M
  • Priestley, MJN
  • Benzoni, G
• Publication Date: 2000-4

Language

• English

Media Info

• Features: Appendices; Figures; References;
• Pagination: p. 510-517
• Serial:
  • Journal of Structural Engineering
  • Volume: 126
  • Issue Number: 4
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9445
  • Serial URL: http://ascelibrary.org/loi/jsendh

Subject/Index Terms

• TRT Terms: Beams; Bridges; Cast in place concrete; Cohesionless materials; Columns; Curvature; Deformation curve; Elastic analysis; Finite element method; Hinges; Mathematical models; Moments (Mechanics); Piles (Supports); Reinforced concrete; Shear properties; Soil structure interaction; Soils; Stiffness; Structural analysis; Superstructures
• Subject Areas: Bridges and other structures; Design; Geotechnology; Highways; I24: Design of Bridges and Retaining Walls; I42: Soil Mechanics;

Filing Info

• Accession Number: 00794019
• Record Type: Publication
• Contract Numbers: RTA-59A131
• Files: TRIS
• Created Date: Jun 20 2000 12:00AM