Seismic Retrofitting of Cruciform-Shaped Columns by Jacketing with Fiber-Reinforced Polymer

This study investigated retrofit measures for improving the seismic performance of cruciform-shaped columns in the Aurora Avenue Bridge in Seattle, Washington. Tests on column specimens representing as-built conditions resulted in shear failures at modest displacement levels, accompanied by severe strength and stiffness degradation. Tests on column specimens retrofitted with jacketing of fiber-reinforced polymer (FRP) resulted in improved performance compared with that obtained for the as-built column specimens. The FRP jacket needed to be anchored in the reentrant corners of the cruciform-shaped columns to be effective. In addition, the FRP jacket did not provide adequate confinement to prevent flexural hinge degradation. The final retrofit design that incorporated reentrant corner anchorage and grout-filled steel collars at the plastic hinge regions produced a ductile flexural response.

• Record URL:
  https://doi.org/10.3141/2251-14
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Seismic+Retrofitting+of+Cruciform-Shaped+Columns+by+Jacketing+with+Fiber-Reinforced+Polymer&author=B.+Walkenhauer&author=D.+McLean&author=C.+Boone&author=M.+Lamont&publication_year=2011
• Availability:
  • Find a library where document is available. Order URL: http://www.trb.org/Main/Blurbs/166628.aspx
• Authors:
  • Walkenhauer, Brian J
  • McLean, David I
  • Boone, Craig
  • Lamont, Michael
• Publication Date: 2011

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 135-143
• Monograph Title: Structures 2011
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 2251
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Bridge design; Columns; Degradation failures; Earthquake resistant design; Fiber reinforced polymers; Jacketing (Strengthening); Retrofitting; Shear strength
• Uncontrolled Terms: As-built data; Grouted steel collars
• Geographic Terms: Seattle (Washington)
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01340764
• Record Type: Publication
• ISBN: 9780309167710
• Report/Paper Numbers: 11-1569
• Files: TRIS, TRB, ATRI
• Created Date: May 24 2011 7:42AM