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首页> 外文期刊>Journal of Civil Engineering and Management >NUMERICAL ANALYSIS OF ASPHALT MIXTURE AND COMPARISON WITH PHYSICAL MARSHALL TEST
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NUMERICAL ANALYSIS OF ASPHALT MIXTURE AND COMPARISON WITH PHYSICAL MARSHALL TEST

机译：沥青混合料的数值分析及其与物理马歇尔试验的比较

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This paper addresses simulation of asphalt on the macroscopic scale, using the Discrete Element Model (DEM). Asphalt mixture is considered as a particulate solid composed of relatively stiff deformable layered spherical particles embedded into a homogenised matrix. The discrete model presents a 3D network of one-dimensional elements connecting particle's centres and comprising mutual interaction of particles. The contribution of the film layer and the interface thickness for normal stiffness is described analytically and illustrated by simulation results. Development of the normal interaction model of layered particles contacting via interface on the meso scale is the key point of the current development. The model applied aiming to simulate deformation of asphalt mixture is able to capture properties of the weaker matrix interface while layered particle comprises of bitumen film in meso scale. The developed technique is applied for simulation of Marshall test, i.e. diametric compression of cylindrical specimen, widely used for characterisation of asphalt mixtures. Finally, suitability of the model is illustrated by comparison with the available experimental results.
机译：本文使用离散元模型（DEM）在宏观尺度上模拟沥青。沥青混合物被认为是由嵌入到均质基体中的相对较硬的可变形层状球形颗粒组成的颗粒状固体。离散模型提供了一个由一维元素构成的3D网络，该一维元素连接粒子的中心并包含粒子之间的相互作用。解析地描述了薄膜层和界面厚度对法向刚度的贡献，并通过仿真结果进行了说明。通过介观尺度的界面接触的层状颗粒的正常相互作用模型的发展是当前发展的重点。旨在模拟沥青混合料变形的模型能够捕获较弱的基体界面特性，而层状颗粒由中观规模的沥青膜组成。这项开发的技术可用于模拟马歇尔试验，即圆柱试样的直径压缩，广泛用于表征沥青混合料。最后，通过与可用的实验结果进行比较说明了模型的适用性。

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