FLEXURAL BEHAVIOR EXPERIMENTS OF ULTRA-HIGH PERFORMANCE CONCRETE BEAMS REINFORCED WITH STEEL BAR AND HYBRID-FIBER

Sun Xiaokai; Diao Bo; Ye Yinghua

doi:10.13204/j.gyjz201211004

Volume 42 Issue 11

Dec. 2014

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Citation:

Sun Xiaokai, Diao Bo, Ye Yinghua. FLEXURAL BEHAVIOR EXPERIMENTS OF ULTRA-HIGH PERFORMANCE CONCRETE BEAMS REINFORCED WITH STEEL BAR AND HYBRID-FIBER[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(11): 16-21. doi: 10.13204/j.gyjz201211004

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FLEXURAL BEHAVIOR EXPERIMENTS OF ULTRA-HIGH PERFORMANCE CONCRETE BEAMS REINFORCED WITH STEEL BAR AND HYBRID-FIBER

doi: 10.13204/j.gyjz201211004

1.
1. Department of Civil Engineering,Beihang University,Beijing 100191,China;
2.
2. First Bureau of Real Estate Development Co.Ltd,China Construction Group,Beijing 100161,China;
3.
3. Open Topics of State Key Laboratory of Subtropical Architecture Science,South China University of Technology,Guangzhou 510640,China

Rev Recd Date: 2012-07-15
Publish Date: 2012-11-20

Abstract

Abstract

The beams were cast with self-compacting UHPFRC and cured in normal temperature．The flexural behaviors of 8 UHPFRC beams with different reinforcement ratio were tested by static loading．The results showed that the bearing capacities of ultra-high performance concrete beams reinforced with steel bars and hybrid-fiber were increased by 13%,the ductility factors were increased by 158% ,as compared with beams with the same strength of the matrix and reinforcement ratio．Comparing with the beams without fiber,the initial crack load,and load of 0.1mm crack width of beams with fiber when the load is accounted for the proportion of the ultimate load greatly improved,but the load of 0.2 mm crack width was not very different．Comparing with beams with reinforcement ratio of 0.86% ,the flexural capacities of beams were increased by 72% and 113% respectively when the reinforcement ratios of beams were 1.52% and 2.38% ．The calculating methods of the flexural capacities of UHPFRC beams reinforced with tensile steel bars and hybrid-fiber were proposed according to the document．The calculated results corresponded well with the experimental data．

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References(11)

References

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[4] 高丹盈，赵伟，张廷毅，等．钢纤维体积率对高强混凝土断裂性能的影响[J].工业建筑，2008，38(8): 50－53.

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