Mechanical Axial Force Transfer Within Cast-In-Steel-Shell Piles - Verification Through Full-Scale Experimentation and Finite Element Analysis

In this study, the axial force transfer within cast-in-steel-shell (CISS) piles through mechanical axial force transfer mechanisms fixed to the steel shell interior surface, and through surface bond was investigated through a full-scale experiment and finite element analysis. The experimental program consisted of twenty-one full-scale CISS pile test units, with typical diameters of 24 in. (610 mm), and steel shell diameter to thickness ratios (D/t) ranging from 24 to 128. Test units were subjected to a quasi-static reversed cyclic axial loading. The shear ring mechanism was found to be the most effective, of the designs tested. This mechanism was studied further experimentally by examining the effect of shear ring spacing, and the effect of D/t ratio on the shear ring force transfer. This mechanism was also studied analytically through finite element modeling using ABAQUS/EXPLICIT. Three dimensional solid element models were developed to study the axial force through the shear ring mechanism, and surface bond. The models were computationally intense and were run on at the San Diego Supercomputer Center at UCSD. The nonlinear models involved a complex contact analysis, concrete crushing, core deformation, and circumferential yielding of the steel shell and the shear ring. Results for two of the models, at a high D/t ratio, and at a low D/t ratio will be presented in this paper and compared to experimental results.

• Corporate Authors:

  Multidisciplinary Center for Earthquake Engineering Research

  State University of New York, 107 Red Jacket Quadrangle, P.O. Box 610025
  Buffalo, NY  United States  14261-0025
• Authors:
  • Gebman, Michael
  • Ashford, Scott A
  • Restrepo, Jose I
• Conference:
  • Fifth National Seismic Conference on Bridges & Highways
  • Location: San Francisco CA, United States
  • Date: 2006-9-18 to 2006-9-20
• Publication Date: 2006

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; References;
• Pagination: 12p
• Monograph Title: Fifth National Seismic Conference on Bridges and Highways: Innovation in Earthquake Engineering for Highway Structures

Subject/Index Terms

• TRT Terms: Axial loads; Design; Diameter; Experiments; Mechanical analysis; Repeated loads; Thickness; Transfer characteristics
• Identifier Terms: ABAQUS (Computer program)
• Uncontrolled Terms: Axial force; Nonlinearity; Quasi-static response; Steel piling; Three dimensional modeling; Three dimensional models; Verification
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01080383
• Record Type: Publication
• Report/Paper Numbers: B02
• Files: TRIS
• Created Date: Oct 31 2007 6:39AM