DESIGN ASPECTS OF CONCRETE STRUCTURES STRENGTHENED WITH EXTERNALLY BONDED CFRP-PLATES

Abstract

Thin plates of carbon fiber reinforced plastics (CFRP-plates) will increasingly replace steel plates for the strengthening of concrete structures. Bending and shear design follows conventional reinforced concrete design. Specific limit steel and plate strains have to be observed. According to truss analogy (TA), the plate ends have to be anchored to the concrete outside of the line of tensile forces. CFRP-plate anchorages can fail through interlaminar bond failure in addition to concrete failure, already known for steel plates. Bond tests indicate that an already existing bond model, developed for steel plates, can be adapted to CFRP-plates. For the covering abstract see ITRD E111699.