SEISMIC BEHAVIOR OF BRIDGE COLUMN NON-CONTACT LAP SPLICES

This study formed part of an on-going research program, sponsored by the Illinois Department of Transportation, to examine seismic retrofit methods appropriate to the type of bridge columns and support foundations existing in Illinois. Full scale field tests confirmed the seismic vulnerability of lap splice details commonly used in bridge columns constructed during the 1960s and also demonstrated that the as-built lap splices were typically non-contact, rather than contact, as shown on the design drawings. Laboratory tests were made, modeling the lap splice details found in the field, and involving systematic variations in concrete cover, column bar circumferential spacing and dowel and column bar radial separation. From the combination of the field and laboratory results an analytical model is developed that provides reasonable predictions of the strength, stiffness and ductility of circular bridge columns with inadequate length non-contact lap splices at their base.

• Corporate Authors:

  University of Illinois, Urbana-Champaign

  Department of Civil and Environmental Engineering
  205 North Mathews Avenue
  Urbana, IL  United States  61801-2352

  Illinois Department of Transportation

  2300 S. Dirksen Parkway
  Springfield, IL  United States  62764

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Lin, Yun
  • Gamble, W L
  • Hawkins, N M
• Publication Date: 1998-6

Language

• English

Media Info

• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 340 p.

Subject/Index Terms

• TRT Terms: Bridge foundations; Columns; Ductility; Earthquake resistant design; Field tests; Laboratory tests; Mathematical models; Retrofitting; Stiffness; Strength of materials
• Uncontrolled Terms: Non-contact lap splices; Seismic vulnerability
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00760526
• Record Type: Publication
• Report/Paper Numbers: FHWA-IL-UI-264,, UILU-ENG-98-2005,, Project Report
• Contract Numbers: IHR-330
• Files: TRIS, USDOT
• Created Date: Mar 22 1999 12:00AM