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Behavior of CFRP strengthened RC multicell box girders under torsion
Abeer A. Majeed,Abbas A. Allawi,Kian H. Chai,Hameedon W. Wan Badaruzzam 국제구조공학회 2017 Structural Engineering and Mechanics, An Int'l Jou Vol.61 No.3
The use of fiber reinforced polymer (FRP) for torsional strengthening of reinforced concrete (RC) single cell box beams has been analyzed considerably by researchers worldwide. However, little attention has been paid to torsional strengthening of multicell box girders in terms of both experimental and numerical research. This paper reports the experimental work in an overall investigation for torsional strengthening of multicell box section RC girders with externally-bonded Carbon Fiber Reinforced Polymer CFRP strips. Numerical work was carried out using non-linear finite element modeling (FEM). Good agreement in terms of torque-twist behavior, steel and CFRP reinforcement responses, and crack patterns was achieved. The unique failure modes of all the specimens were modeled correctly as well.