Flexural Characteristics of Prestressed Concrete Beams with CFRP Tendons


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Title: Flexural Characteristics of Prestressed Concrete Beams with CFRP Tendons

Author(s): T. Kato and N. Hayashida

Publication: Special Publication

Volume: 138


Appears on pages(s): 419-440

Keywords: Beams (supports\; bending; ductility; fatigue (materials); fiber reinforced plastics; flexural strength; prestressed concrete; prestressing steels; unbonded prestressing

Date: 9/1/1993

This paper reports on the effects of improvement in flexural characteristics and deformability(ductility) when using unbonded CFRP(Carbon Fiber Reinforced Plastic) tendons in prestressed concrete (PC) beams and bending fatigue characteristics of bonded type PC beams with CFRP tendons. Based on the results of flexural loading experiments, with PC beams using unbonded CFRP tendons, failure modes shifted from CFRP tendons rupture type to concrete crushing type. while deformation at the ultimate stage was also changed greatly for the better. It was also succeeded in ascertaining that effective prestressing force, and tensile reinforcement quantity and variety are influential as factors increasing deformability at the ultimate stage. Further, as the result of bending fatigue tests of bonded type PC beams with CFRP tendons, it was confirmed that reduction in ultimate flexural loads of bonded type PC beams due to repetitive loading was not seen and bending fatigue properties were favorable.