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首页> 外文期刊>Journal of testing and evaluation >Numerical Simulation of Pervious Concrete Using Discrete Element Modeling Technique
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Numerical Simulation of Pervious Concrete Using Discrete Element Modeling Technique

机译：离散元建模技术对透水混凝土的数值模拟

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The objective of this study was to develop a computational model to simulate the behavior of pervious concrete (PC) material. A virtual discrete model will help in understanding the micro- and macro-mechanical behavior of PC, which is otherwise difficult to determine. A particle flow continuum model was used to develop the discrete model for different pervious PC mixtures consisting of different sizes and proportions of coarse aggregates. The displacement versus force and stress versus strain relationships of PC specimens with different aggregate sizes, aggregate-cement ratios, and water-cement ratios were produced from the numerical models. The vertical porosity distribution of laboratory samples was investigated using image analysis techniques. The results from the image analyses were utilized in modeling exercise through Particle Flow Code 2-Dimensional (PFC2D). The PFC2D model predictions also matched well with the results of mechanical tests with very high coefficient of determination. This research demonstrated the great potential of discrete element method to analyze the performance of PC mixtures with varying gradations and properties. It is envisaged that this study will further the state-of-the-art analytical research in the area of PC by the principles of discrete element model methods and image analyses techniques.
机译：这项研究的目的是开发一个计算模型来模拟透水性混凝土（PC）材料的行为。虚拟离散模型将有助于理解PC的微观和宏观力学行为，否则很难确定。颗粒流连续体模型用于针对不同渗透性PC混合物（由不同大小和比例的粗骨料组成）开发离散模型。由数值模型产生了具有不同骨料尺寸，骨料-水泥比和水-水泥比的PC试样的位移-力和应力-应变关系。使用图像分析技术研究了实验室样品的垂直孔隙率分布。图像分析的结果通过“二维粒子流代码”（PFC2D）用于建模练习。 PFC2D模型的预测也与具有很高确定系数的机械测试结果非常吻合。这项研究证明了离散元素法在分析具有不同等级和性质的PC混合物的性能方面的巨大潜力。可以预料，这项研究将通过离散元素模型方法和图像分析技术的原理，进一步推动PC领域的最新分析研究。

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