Performance of Carbon Fiber Reinforced Polymer (CFRP) Tendons and their use forStrengthening of Prestressed Concrete Beams

摘要

The purpose of this study was to investigate the performance of Carbon FiberReinforced Polymer (CFRP) tendons and their use for strengthening of prestressed concrete beams. The study involved two phases. In the first phase, the performance and ultimate strength of CFRP tendons were investigated, with emphasis on the performance and ultimate strength of the tendon under combined axial load and harping. In the second phase, the performance of prestressed concrete beams strengthened by using exterior post-tensioned CFRP tendons was investigated. The second phase also included the development of an analytical model for predicting the behavior of strengthened beams and conducting a limited parametric study of prestressed concrete beams strengthened by exterior post-tensioned tendons. At the completion of all fatigue and sustained loading tests, residual strength tests were conducted under combined axial load and harping.