直剪状态下再生混凝土的变形性能及损伤分析

doi:10.11896/cldb.20090047

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Abstract In order to study the deformation performance and the law of damage evolution of recycled concrete under the state of direct shear, a total of 33 recycled concrete specimens was designed for direct shear test with the replacement rate of recycled coarse aggregate as the change parameter.The failure pattern of recycled concrete under direct shear load was observed in the test, and the shear displacement curve of the whole process was obtained. The influence of the refined replacement rate of recycled coarse aggregate on shear modulus, ductile deformation, energy dissipation, damage evolution and other properties was deeply analyzed.The results show that with the increase of the replacement rate of recycled coarse aggregate, the shear modulus of recycled concrete decreases, ductility deformation and energy dissipation increase.The rate of substitution has little effect on the damage rate and the damage curve, but has some effect on the initial damage time.The shear-displacement equation and the damage constitutive equation is proposed based on the shear strength test results. The calculated results are in good agreement with the test results.

Key words： recycled concrete shear strength deformation properties damage evolution energy dissipation ductile deformation

Published: 03 November 2021

CLC number:

TU528

Fund:National Natural Science Foundation of China (51908141), the Guangxi Natural Science Foundation (2019GXNSFBA245030), the Guangxi Science and Technology Base and Talent Special Project (AD19110068),the Open Project of Guangxi Key Laboratory (2019ZDK025), Project to Improve the Basic Scientific Research Ability of Young and Middle-aged Teachers in Guangxi Universities(2019KY0361).

About author:: Yuliang Chen received his Ph.D. degree in civil engineering from Guangxi University in June 2018. He is currently an associate professor and master supervisor in Guangxi University of Science and Technology. His research interests are preparation and application of sustainable green building materials.
Zongping Chen serves in College of Civil Engineering and Architecture, Guangxi University. He is mainly engaged in teaching and research in structural enginee-ring, disaster prevention and mitigation engineering and protection engineering, and he has published 150 academic papers cited by SCI and EI.

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	CHEN Yuliang
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Cite this article:

CHEN Yuliang,JIANG Rui,CHEN Zongping, et al. Deformation Performance and Damage Analysis of Recycled Concrete Under Direct Shear Condition[J]. Materials Reports, 2021, 35(19): 19015-19021.

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http://www.mater-rep.com/EN/10.11896/cldb.20090047 OR http://www.mater-rep.com/EN/Y2021/V35/I19/19015

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