Abstract: The aging infrastructure of the United States requires significant attention for developing new materials and techniques to
effectively and economically revive this aging system. Damaged steel-concrete composite girders can be repaired and retrofitted by epoxy
bonding carbon fiber-reinforced polymer ~CFRP! laminates to the critical areas of tension flanges. This paper presents the results of a
study on the behavior of damaged steel-concrete composite girders repaired with CFRP sheets under static loading. A total of three
large-scale composite girders made of W355 313.6 A36 steel sections and 75-mm-thick by 910-mm-wide concrete slabs were prepared
and tested. One, three, and five layers of CFRP sheet were used to repair the specimen with 25, 50, and 100% loss of the cross-sectional
area of their tension flange, respectively. The test results showed that epoxy bonded CFRP sheet could restore the ultimate load-carrying
capacity and stiffness of damaged steel-concrete composite girders. Comparison of the experimental and analytical results revealed that
the traditional methods of analysis of composite beams were conservative