Precast Bent System for High Seismic Regions: Laboratory Tests of Column-to-Drilled Shaft Socket Connections

This report provides detailed information from the laboratory investigation of two precast column-to-drilled shaft large-scale tests, including descriptions of the specimen design, testing, data reduction, and conclusions regarding the use of the connection with the precast bent system. The tests provide data regarding the performance of the precast column-to-drilled shaft connection. The results indicate that the connection, when used with a precast column, is sufficiently strong to resist plastic hinging in the column above the drilled shaft splice zone. The column reinforcing bars were anchored with headed bar ends to facilitate column strength development. The behavior is emulative of cast-in-place performance. The specimens tested were based on the minimum practical difference in diameters of the shaft relative to the column. When adequate confinement in the reinforcing cage of the shaft is included in the splice zone, the column can form a plastic hinging mechanism above the shaft without incurring damage in the shaft splice zone. If sufficient confinement is not included, then the resulting behavior is undesirable because the splice zone strength rapidly deteriorates. Recommendations for transverse reinforcement are provided to ensure desirable performance, and these result in more reinforcement in the upper portion of the splice zone than in the lower portion.

• Record URL:
  • https://doi.org/10.21949/1506040
• Record URL:
  • http://www.fhwa.dot.gov/hfl/pubs/hif13038/hif13038.pdf
• Record URL:
  • https://rosap.ntl.bts.gov/view/dot/42685
• Supplemental Notes:
  • Technical documentation report date: May 2013.
• Corporate Authors:

  BergerABAM Engineers, Incorporated

  33301 Ninth Avenue South, Suite 300
  Federal Way, WA  United States  98003-2600

  University of Washington, Seattle

  Seattle, WA  United States  98195

  Federal Highway Administration

  Highways for LIFE Technology Partnerships Program
  1200 New Jersey Avenue, SE
  Washington, DC    20590
• Authors:
  • Tran, Hung Viet
  • Stanton, John F
  • Eberhard, Marc O
• Publication Date: 2013-6

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 127p

Subject/Index Terms

• TRT Terms: Bents; Bridge construction; Bridge design; Bridge foundations; Columns; Earthquake resistant design; Laboratory tests; Material reinforcement; Precast concrete; Structural connection
• Subject Areas: Bridges and other structures; Construction; Design; Highways; I24: Design of Bridges and Retaining Walls; I53: Construction of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01502030
• Record Type: Publication
• Report/Paper Numbers: FHWA-HIF-13-038
• Contract Numbers: DTFH61-09-G-00005
• Files: NTL, TRIS, ATRI, USDOT
• Created Date: Dec 23 2013 7:53AM