Deformation Performance and Damage Analysis of Recycled Concrete Under Direct Shear Condition
CHEN Yuliang1,2, JIANG Rui1, CHEN Zongping1,2, LIU Jie1
1 School of Civil Engineering, Guangxi University of Science and Technology,Liuzhou 545006, China 2 Guangxi Key Laboratory of Disaster Prevention and Mitigation and Engineering Safety, Nanning 530004, China
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.
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