Performance of moment redistribution in RC continuous beams strengthened with externally bonded CFRP

doi:10.19936/j.cnki.2096-8000.20220228.005

Abstract

Abstract: The finite element analysis model of RC continuous beams strengthened with externally bonded CFRP is established by using ABAQUS. The effect of amount of CFRP, bonded length and position of CFRP on the flexural performance and moment redistribution characteristics of RC continuous beam is discussed, and the calculation formulas of the moment modulation coefficient at mid-span and central support which varies with the amount and bonded length of CFRP are established respectively for the beams strengthened in positive moment zone and in negative moment zone. Then, the correctness of the formulas are verified by the experimental data. The results show that both the yield load and the ultimate load increase nonlinearly with the increase of amount of CFRP and bonded length for beams strengthened in either positive or negative moment zone, and the effect of amount of CFRP on the flexural capacity of beam is more significant than that of CFRP bonded length, and the moment values adjusted by the formulas of moment modulation coefficient are more consistent with the experimental moment values, which shows that the formulas established in this paper are effective and feasible.

Key words: CFRP strengthening, continuous beam, flexural performance, finite element analysis, moment modulation coefficient

CLC Number:

TB332

ZHOU Man-qing, ZHANG Zhi-mei, CHENG Wen. Performance of moment redistribution in RC continuous beams strengthened with externally bonded CFRP[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(2): 31-37.

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