Architecture & Civil Engineering

Experimental Study of Bonding Properties Between GFRP Bars and ECC After Freezing-melting Circulation

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  • College of Mechanics and Civil Engineering,China University of Mining and Technology ( Beijing) ,Beijing 100083,China
吴丽丽(1977-),女,博士,教授,主要从事钢-混凝土组合结构研究.

Received date: 2019-04-22

  Revised date: 2019-07-26

  Online published: 2019-11-02

Supported by

Supported by the National Natural Science Foundation of China( 51678564)

Abstract

The combination of engineering cementitious composites ( ECC) and glass fiber reinforced composites ( GFRP) can effectively improve the durability of structures ,but the research of bond durability between GFRP and ECC was rarely reported under the environment of freezing-melting circulation. 42 specimens divided into 9 groups were designed herein. Quick freezing method was adopted to investigated the changes of the weight loss rate, the transverse relative dynamic modulus of elasticity of ECC,bond strength between GFRP and ECC compared with the ordinary concrete after 75 freezing-melting circulation,and the bond-slip curves of specimens were also ana- lyzed. The results show that the antifreeze quality of ECC is superior to that of the ordinary concrete,and the bond- ing property between ECC and GFRP bars of strength grade C30 and C50 are 3. 0 times and 4. 3 times of that ordi- nary C30 concrete and GFRP bars respectively after 75 times freezing-melting circulation. The pull-out test results were fittingly compared with the analytical models including mBPE model,CMR model and continuous curve mod- el,thus the corresponding fitting parameters and fitting correlation coefficients were obtained,and the study shows that the CMR model provides better fitting prediction.

Cite this article

WU Lili, JU Xiangkai, CONG Qiming, et al . Experimental Study of Bonding Properties Between GFRP Bars and ECC After Freezing-melting Circulation[J]. Journal of South China University of Technology(Natural Science), 2019 , 47(12) : 53 -61 . DOI: 10.12141/j.issn.1000-565X.190199

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