Research on Physical and Mechanical Characteristics of Recycled Aggregate Concrete

Luo, Xing-wen; Yao, Hailin; Lü, Zheng Hang

doi:10.12783/dtmse/amsee2017/14277

Cited by 1 publication

(2 citation statements)

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“…If the circulation ratio / is equal to 1, the point (1, 1) will locate on the curve of formulas (4) and (5). Via the two formulas, values of can be deducted as formula (6), which correspond to the maximum fatigue stress and the residual fatigue stress.…”

Section: Fatigue Strain Evolution Modelmentioning

confidence: 99%

“…If we know the relationship of the curve and the cycles, we are able to qualitatively describe the evolution of the material fatigue strain, which will provide the basis for the behavior of the material evaluation. In numerous constant amplitude fatigue tests, it is shown that the total longitude deformation and the residual deformation of the concrete will display the universal and stable three-stage law [1][2][3][4][5][6], which presents firstly the rapid growth stage, then the stable growth stage, and ultimately the rapid growth stage. This is suitable for not only the ordinary concrete, lightweight aggregate concrete, high strength concrete, or fiber reinforced concrete, but also the compression fatigue, tension fatigue, bending fatigue, uniaxial fatigue, or multiracial fatigue.…”

Section: Introductionmentioning

confidence: 99%

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Research on Fatigue Strain and Fatigue Modulus of Concrete

Liu

Zhou

2017

Advances in Civil Engineering

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Concrete fatigue strain and fatigue modulus evolution play a vital role in the evaluation of the material properties. In this paper, by analyzing the advantages and disadvantages of existing concrete strain analysis methods, the level-S nonlinear fatigue strain model was proposed. The parameters' physical meaning, the ranges, and the impact on the shape of the curve were all discussed. Then, the evolution model of fatigue modulus was established based on the fatigue strain evolution model and the hypothesis of fatigue modulus inversely related fatigue strain amplitude. The results indicate that the level-S model covered all types of fatigue strain evolution. It is very suitable for the description of strain evolution of concrete for its strong adaptability and high accuracy. It was found that the fitting curves coincided with the experimental curves very well, and the correlation coefficients were all above 0.98. The evolution curves of fatigue strain modulus both have three stages, namely, variation phase, linear change stage, and convergence stage. The difference is that the fatigue strain evolution curve is from the lower left corner to the upper right corner, but the fatigue modulus evolution curve is from the upper left corner to the right lower corner.

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Section: Fatigue Strain Evolution Modelmentioning

confidence: 99%