Seismic Retrofit of Cruciform-Shaped Columns in the Aurora Avenue Bridge Using FRP Wrapping

Experimental tests were conducted on seven 1/3-scale column specimens to evaluate the vulnerabilities of existing cruciform-shaped columns and to develop appropriate retrofit measures that address the identified vulnerabilities. The specimens represented both solid and split columns in the Aurora Avenue Bridge in Seattle, Washington. The as-built specimens failed at low ductility levels due to shear distress. Fiber reinforced polymer (FRP) jackets with FRP inserts to anchor the jackets in the column reentrant corners along with steel confinement collars to provide confinement in the hinging regions were used to retrofit the column specimens. The retrofitted specimens developed plastic hinging in the column, with enhanced strength, energy and ductility capacities. Guidelines were presented for designing the various components of the retrofit measures.

• Record URL:
  http://www.wsdot.wa.gov/research/reports/fullreports/753.1.pdf
• 
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/18456
• Corporate Authors:

  Washington State University, Pullman

  Washington State Transportation Center
  Pullman, WA  United States  99164

  Washington State Department of Transportation

  Transportation Building, 310 Maple Park Avenue SE, P.O. Box 47300
  Olympia, WA  United States  98504-7300

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • McLean, David I
  • Walkenhauer, Brian J
• Publication Date: 2010-9

Language

• English

Media Info

• Media Type: Web
• Edition: Research Report
• Features: Figures; Photos; References; Tables;
• Pagination: 96p

Subject/Index Terms

• TRT Terms: Anchoring; Bridges; Columns; Earthquake resistant design; Fiber reinforced polymers; Jacketing (Strengthening); Retrofitting; Seismicity
• Subject Areas: Bridges and other structures; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01332911
• Record Type: Publication
• Report/Paper Numbers: WA-RD 753.1
• Contract Numbers: T4120-15
• Files: NTL, TRIS, USDOT, STATEDOT
• Created Date: Mar 21 2011 2:13PM