Suggestion of flexural capacity evaluation and prediction of prestressed CFRP strengthened design

Sang Kyun Woo, Jin Won Nam, Jang Ho Jay Kim, Sang Hoon Han, Keun Joo Byun

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)


The purpose of this study is to evaluate the flexural behavior of RC (Reinforced Concrete) beams strengthened with prestressed CFRP (Carbon Fiber Reinforced Polymers) plates, and to suggest the analytic equations of flexural capacity calculation for strengthening design. The evaluation of flexural behavior is carried out by parameter study experiments, and the derived design equations are verified by the experimental results. The experimental parameters are concrete compressive strength, tensile reinforcement ratio, and prestressing level. Failure and fracture modes are observed and the efficiency of different CFRP prestressing levels is studied. The results show that the non-prestressed specimens fail by spalling of the CFRP plate from the RC beam, while prestressed specimens fail due to CFRP plate failure. The presented equations of flexural capacity for RC beams strengthened with prestressed CFRP plates are shown to be sufficiently accurate in predicting flexural strengthening effectiveness of RC beams.

Original languageEnglish
Pages (from-to)3751-3763
Number of pages13
JournalEngineering Structures
Issue number12
Publication statusPublished - 2008 Dec

Bibliographical note

Funding Information:
This research program was funded by Electric Power Industry Technology Evaluation & Planning (ETEP) of Korea and its kind support is gratefully acknowledged.

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering


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