[1] Pan Jinlong, Wang Luping, Yuan Fang, Huang Yifang, et al. Flexural behaviors of FRP strengthened corroded RC beams [J]. Journal of Southeast University (English Edition), 2014, 30 (1): 77-83. [doi:10.3969/j.issn.1003-7985.2014.01.015]

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Flexural behaviors of FRP strengthened corroded RC beams()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

30

Issue:

2014 1

Page:

77-83

Research Field:

Civil Engineering

Publishing date:

2014-03-31

Info

Title:

Flexural behaviors of FRP strengthened corroded RC beams

Author(s):

Pan Jinlong¹;  Wang Luping¹;  Yuan Fang¹;  Huang Yifang²

¹Key Laboratory of Concrete and Pre-stressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
²China United Engineering Corporation, Hangzhou 310022, China

Keywords:

corroded;  reinforced concrete beam;  FRP(fiber reinforced polymer);  strengthening;  numerical analysis;  flexural behavior

PACS:

TU375

DOI:

10.3969/j.issn.1003-7985.2014.01.015

Abstract:

The flexural behavior of eight FRP(fiber reinforced polymer)strengthened RC(reinforced concrete)beams with different steel corrosion rates are numerically studied by Ansys finite element software. The influences of the corrosion rate on crack pattern, failure mechanism, ultimate strength, ductility and deformation capacity are also analyzed. Modeling results show that the beams with low corrosion rates fail by the crushing of the concrete in the compression zone. For the beams with medium corrosion rates, the bond slip between the concrete and the longitudinal reinforcement occurs after steel yielding, and the beams finally fail by the debonding of the FRP plates. For the beams with high corrosion rates, the bond slip occurs before steel yielding, and the beams finally fail by the crushing of the concrete in the compression zone. The higher the corrosion rates of the longitudinal reinforcement, the more the carrying capacity of FRP strengthened RC beams reduces. The carrying capacity of RCB-1(the corrosion rate is 0)is 115 kN, and the carrying capacity of RCB-7(the corrosion rate is 20%)is 42 kN. The deformation capacity of FRP strengthened corroded RC beams is higher than that of FRP strengthened uncorroded RC beams. The ultimate deflection of RCB-1 and RCB-7 are 20 mm and 35 mm, respectively, and the ultimate deflection of RCB-5(the corrosion rate is 10%)reaches 60 mm.

References:

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Memo

Memo:

Biography: Pan Jinlong(1976—), male, doctor, professor, jinlongp@gmail.com.
Foundation items: The National Natural Science Foundation of China(No.51278118), Scientific and Technological Research Project of Ministry of Education(No.113028A), the Natural Science Foundation of Jiangsu Province(No.BK2012756), the Program for Special Talents in Six Fields of Jiangsu Province(No.2011-JZ-010).
Citation: Pan Jinlong, Wang Luping, Yuan Fang, et al. Flexural behaviors of FRP strengthened corroded RC beams[J].Journal of Southeast University(English Edition), 2014, 30(1):77-83.[doi:10.3969/j.issn.1003-7985.2014.01.015]

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