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Influence of Freeze-thaw Cycles and Sustained Loads on Deformation Performance of High Strength Concrete Beam Strengthened with CFRP(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2017年02期
Page:
26-32
Research Field:
Publishing date:

Info

Title:
Influence of Freeze-thaw Cycles and Sustained Loads on Deformation Performance of High Strength Concrete Beam Strengthened with CFRP
Author(s):
WANG Su-yan SONG Ze-lin DING Li
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology
Keywords:
CFRP freeze-thaw cycle sustained load high strength concrete beam ultimate bearing capacity deformation performance
PACS:
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DOI:
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Abstract:
The four-point bending test was conducted to investigate the influence of freeze-thaw cycles and sustained loads on the deformation performance of high strength concrete beams strengthened with carbon fiber reinforced polymer (CFRP). The bearing capacity, stiffness and failure mode of the test beam under different environmental conditions were analyzed. The results show that the performance of test beam changes little under the action of freeze-thaw cycles. Both of the two factors have negative effects on the performance of beam under the coupling action of freeze-thaw and sustained load, and the bond behavior of CFRP-concrete interface of beam under sustained load decreases with the increase of freezethaw cycles. The stress of CFRP-concrete interface will increase the deterioration degree of the interface under freeze-thaw cycles, and the performance of strengthened beam will decrease.

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Last Update: 2017-03-30