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Supervised by Ministry of Industry and Information Technology of The People's Republic of China Sponsored by Harbin Institute of Technology Editor-in-chief Yu Zhou ISSNISSN 1005-9113 CNCN 23-1378/T

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Related citation:CHEN Wei-hong,ZHENG Wen-zhong.Flexural behavior of composite beams after the ultimate limit state externally strengthened with CFRP sheets bonded with high-temperature resistant matrix[J].Journal of Harbin Institute Of Technology(New Series),2010,17(5):679-683.DOI:10.11916/j.issn.1005-9113.2010.05.015.
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Flexural behavior of composite beams after the ultimate limit state externally strengthened with CFRP sheets bonded with high-temperature resistant matrix
Author NameAffiliation
CHEN Wei-hong School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China 
ZHENG Wen-zhong School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China 
Abstract:
In this paper the alkali-activated slag cementitious materials(AASCM)which strength at 600 ℃ is larger than that of AASCM at room temperature,were prepared to paste CFRP sheets to strengthen four simply supported unbonded prestressed composite beams encased circular steel tube truss after ultimate limit state.Test on flexural behavior of these four beams was performed.Moreover,normal section load-bearing capacity of these beams and the curve load-deflection at mid-span were obtained.Experimental results show that it is feasible to strengthen concrete members with CFRP sheets bonded with AASCM.Based on the experimental results and theoretical study,computational method of stiffness is proposed for calculating bending rigidity and normal section load-bearing capacity of concrete simply supported beams strengthened with CFRP sheets bonded with AASCM.Formula of bending rigidity calculation was founded which results are in good agreement with testing data.
Key words:  alkali-activated slag cementitious materials  high-temperature resistance  CFRP sheets  strengthening  composite beam
DOI：10.11916/j.issn.1005-9113.2010.05.015
Clc Number:TU375.1
Fund:

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