EXPERIMENTAL STUDY ON BEHAVIOR OF LONG-TERM BOND-CREEP BETWEEN CORRODED STEEL STRANDS AND CONCRETE

Li Fumin; Yuan Yingshu

doi:10.13204/j.gyjz201202016

Volume 42 Issue 2

Dec. 2014

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Li Fumin, Yuan Yingshu. EXPERIMENTAL STUDY ON BEHAVIOR OF LONG-TERM BOND-CREEP BETWEEN CORRODED STEEL STRANDS AND CONCRETE[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(2): 70-73,18. doi: 10.13204/j.gyjz201202016

Citation:

Li Fumin, Yuan Yingshu. EXPERIMENTAL STUDY ON BEHAVIOR OF LONG-TERM BOND-CREEP BETWEEN CORRODED STEEL STRANDS AND CONCRETE[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(2): 70-73,18. doi: 10.13204/j.gyjz201202016

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EXPERIMENTAL STUDY ON BEHAVIOR OF LONG-TERM BOND-CREEP BETWEEN CORRODED STEEL STRANDS AND CONCRETE

doi: 10.13204/j.gyjz201202016

Li Fumin^1,2,
Yuan Yingshu¹

1.
1. School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221008,China;
2.
2. State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,China

Received Date: 2010-02-03
Publish Date: 2012-02-20

Abstract

Abstract

To study the influence of steel strands corrosion on the long-term behavior of bond-creep,6 pre-tensioned prestressed concrete beams were fabricated,of which,5 beams were mixed with salt and set in different places to be corroded in different intensity for 47 weeks,and the bond-slip of all the 6 beams was tested periodically through the whole period,and then the time varying curves of bond-slip under prestressing were obtained.The results show that under the condition of no corrosion crack,the bond strength increases with corrosion and the bond-creep is restrained,which contribute the creep slip of corrosion beams being less than that of the uncorrosion beam.Moreover,with the increase of corrosion rate and corrosion products expansion ratio,the long-term bond-slip decreases.The analysis shows that if there are corrosion cracks and the bond strength deteriorates,the long-term bond-creep and the load cracks width in anchoring segments should increase,but the prestressing loss and the anchoring bearing capacity should not decrease.
- prestressed concrete structures,
- durability,
- corrosion of steel strand,
- bond,
- creep

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References(15)

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