Development of strength prediction method of RC beams strengthened with prestressed CFRP plates by cross-section analysis

Sang Kyun Woo, Jang Jay Ho Kim, Keun Joo Byun

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The purpose of this study is to evaluate the flexural behavior of Reinforced Concrete (RC) beams strengthened with prestressed Carbon Fiber Reinforced Polymers (CFRP) 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 level 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)1011-1022
Number of pages12
JournalKSCE Journal of Civil Engineering
Volume16
Issue number6
DOIs
Publication statusPublished - 2012 Sep 1

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Carbon fibers
Reinforced concrete
Polymers
Prestressing
Spalling
Compressive strength
Reinforcement
Concretes
Experiments

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

Cite this

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abstract = "The purpose of this study is to evaluate the flexural behavior of Reinforced Concrete (RC) beams strengthened with prestressed Carbon Fiber Reinforced Polymers (CFRP) 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 level 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.",
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Development of strength prediction method of RC beams strengthened with prestressed CFRP plates by cross-section analysis. / Woo, Sang Kyun; Kim, Jang Jay Ho; Byun, Keun Joo.

In: KSCE Journal of Civil Engineering, Vol. 16, No. 6, 01.09.2012, p. 1011-1022.

Research output: Contribution to journalArticle

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