Anchorage of Shear Reinforcement in Prestressed Concrete Bridge Girders

Status: Complete
Report Date: 11/05/2014

Summary:

Researchers conducted laboratory testing of both partial girder sections and full-scale prestressed girders to determine whether the straight-legged stirrup design used in MnDOT prestressed concrete girders adequately anchors the transverse reinforcement in the beams to resist shear forces. Results showed that MnDOT's straight-legged stirrups are well-anchored and provide more than adequate shear resistance, which will allow MnDOT to save costs on implementing a more expensive bent-legged stirrup design.

Project Personnel:

Principal Investigator: Cathy French

Technical Liaison: Benjamin Jilk

Project Coordinator: Shirlee Sherkow

Panel Members:
Arielle Ehrlich - Bridges
Brian Mathys - University of Minnesota
Carol Shield - U of M - Dept of Civil Engineering
David Dahlberg - Bridges
Paul Rowekamp - Bridges
Steven Olson - Olson and Nesvold Engineers

Final Deliverables:

Anchorage of Shear Reinforcement in Prestressed Concrete Bridge Girders (Report #2014-36)
MnDOT's Concrete Bridge Girder Design Proves Safe and Less Expensive (Research Summary)