Abstract:

The new concept of “partiallybonded” was proposed for the first time in China. The loading process, failure mode,loadingdeflection property, ductility performance and effect of prestress degree were analyzed， by the static loading experiment of nine partiallybonded mixed reinforcement concrete beams reinforced with CFRP bars and epoxy resin coated steel bars. Test results show that the mechanical behavior of prestressed concrete beam reinforced with CFRP bars can be improved by using the partiallybonded and mixed reinforcement mode, provide the design calculation method of concrete beam reinforced with CFRP bars with important reference value.

Key words: CFRP bars, concrete beam, partiallybonded , flexural behavior, experimental research