[1] Li Shan, Ren Huitao, Huang Chengkui, Cui Yunfei, et al. Durability of concrete beams reinforced with CFRP sheetunder wet-dry cycles and loading [J]. Journal of Southeast University (English Edition), 2009, 25 (3): 376-380. [doi:10.3969/j.issn.1003-7985.2009.03.019]

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Durability of concrete beams reinforced with CFRP sheetunder wet-dry cycles and loading()

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

Volumn:

25

Issue:

2009 3

Page:

376-380

Research Field:

Materials Sciences and Engineering

Publishing date:

2009-09-30

Info

Title:

Durability of concrete beams reinforced with CFRP sheetunder wet-dry cycles and loading

Author(s):

Li Shan;  Ren Huitao;  Huang Chengkui;  Cui Yunfei

State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China

Keywords:

reinforced concrete beams;  reinforced;  carbon fiber reinforced polymers;  durability;  wet-dry cycles;  sustained load

PACS:

TU528.57

DOI:

10.3969/j.issn.1003-7985.2009.03.019

Abstract:

The test results of eight concrete beams reinforced with carbon fiber reinforced polymer(CFRP)sheets subjected to an aggressive environment under a sustained load are presented.The beams are 1 700 mm long with a rectangular cross-section of 120-mm width and 200-mm depth.The beams are precracked with a four-point flexural load, bonded CFRP sheets, and placed into wet-dry saline water(NaCl)either in an unstressed state or loaded to about 30% or 60% of the initial ultimate load.The individual and coupled effects of wet-dry saline water and sustained bending stresses on the long term behaviour of concrete beams reinforced with the CFRP are investigated.The test results show that the coupled action of wet-dry saline water and sustained bending stresses appears to significantly affect the load capacity and the failure mode of beam strengthened with CFRP, mainly due to the degradation of the bond between CFRP and concrete.However, the stiffness is not affected by the coupled action of wet-dry cycles and a sustained load.

References:

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Memo

Memo:

Biographies: Li Shan(1979—), male, graduate;Huang Chengkui(corresponding author), male, professor, huangck@dlut.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.50608013), Special Prophase Project on Basic Research of the National Department of Science and Technology(No.2004CCA04100).
Citation: Li Shan, Ren Huitao, Huang Chengkui, et al.Durability of concrete beams reinforced with CFRP sheet under wet-dry cycles and loading[J].Journal of Southeast University(English Edition), 2009, 25(3):376-380.

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