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Mid-America Transportation Center: Final Reports and Technical Briefs
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Bottom Flange Reinforcement In Nu I-Girders, George Morcous Ph.D., Kromel Hanna Ph.D., Maher K. Tadros Ph.D., P.E.
Bottom Flange Reinforcement In Nu I-Girders, George Morcous Ph.D., Kromel Hanna Ph.D., Maher K. Tadros Ph.D., P.E.
Mid-America Transportation Center: Final Reports and Technical Briefs
The 1996 edition of AASHTO Standard Specifications for Highway Bridges stated that nominal confinement reinforcement be placed to enclose prestressing steel in the bottom flange of bridge girders from girder ends to at least a distance equal to the girder’s height. The 2004 edition of AASHTO LRFD Bridge Design Specifications changed the distance over which the confinement reinforcement was to be distributed from 1.0h to 1.5h, and gave minimum requirements for the amount of steel to be used, No.3 bars, and their maximum spacing, not to exceed 6.” Research was undertaken to study what impact, if any, confinement reinforcement had …