EXPERIMENTAL STUDY ON DAMAGED COLUMNS STRENGTHENED WITH GFRP STRIP AND STEEL FIBER MORTAR UNDER AXIAL COMPRESSION

LI Zhe; WANG Zhili; XING Leyang

doi:10.13204/j.gyjzG20010706

Volume 51 Issue 2

Jun. 2021

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2021 > 51(2): 193-198

LIU Yuxia, LU Jingzhou, TIAN Feixiang, LI Yunkai, LI Haibo. RESEARCH ON THE DAMAGE OF GEOPOLYMER CONCRETE UNDER THE ACTION OF SALTWATER AND FREEZE-THAW[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(4): 76-81. doi: 10.13204/j.gyjz202004014

Citation:

LI Zhe, WANG Zhili, XING Leyang. EXPERIMENTAL STUDY ON DAMAGED COLUMNS STRENGTHENED WITH GFRP STRIP AND STEEL FIBER MORTAR UNDER AXIAL COMPRESSION[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(2): 193-198. doi: 10.13204/j.gyjzG20010706

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EXPERIMENTAL STUDY ON DAMAGED COLUMNS STRENGTHENED WITH GFRP STRIP AND STEEL FIBER MORTAR UNDER AXIAL COMPRESSION

doi: 10.13204/j.gyjzG20010706

School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an 710048, China

Received Date: 2020-12-20
Available Online: 2021-06-04

Abstract

Abstract

Through the axial compression test of one RC square-section short column and four RC square-section short columns strengthened with composite reinforcement, the axial compression performance of the damaged RC square-section short column strengthened with GFRP sleeve and steel fiber mortar was studied. The restraint effect of GFRP strips on RC columns strengthened with steel fiber mortar was analyzed; under different damage conditions, the bearing capacity, stiffness and ductility of RC columns strengthened with GFRP strips and steel fiber mortar were analyzed. The test results showed that GFRP strip could significantly improve the bearing capacity and ductility of RC columns strengthened with steel fiber mortar; the bearing capacity of damaged RC columns was significantly improved after GFRP strip and steel fiber mortar composite reinforcement, under the same conditions, the improvement rate of the bearing capacity of the composite reinforced column decreaseed with the increase of the degree of damaged RC columns, and the reinforcement effect was obvious in a certain degree, the reinforcement effect was weakened beyond this degree of damage. The axial compression stiffness of the specimen decreased with the increase of damage degree.On the basis of experimental study, the calculation formula of axial bearing capacity of composite reinforced RC short column with square-section was established,and the results were in good agreement with the experimental data.
- GFRP strip,
- steel fiber mortar,
- composite reinforcement,
- damage,
- axial compression performance

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References(17)

References

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