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在细观层次上可将混凝土视为由骨料和砂浆基体组成的两相复合材料,基于已有的随机球骨料的生成方法,通过控制骨料的生长范围达到无须再进行骨料侵入判断的目的,并提出一种新的单元识别方法即通过四面体体积之和识别单元;基于此方法利用Matlab和ANSYS软件生成三维随机骨料模型;结果表明:生成的三维随机骨料几何模型与真实骨料非常接近,改善了随机骨料模型的生成效率,为开展混凝土结构的其他数值模拟提供了一种有效的建模方法。
At the meso-level, concrete can be considered as a two-phase composite material composed of aggregate and mortar matrix. Based on the existing method of generating random spherical aggregate, the aggregate growth range can be controlled to eliminate the need for further aggregate intrusion And proposes a new method of unit identification, which is to identify units by the sum of tetrahedron volumes. Based on this method, a three-dimensional random aggregate model is generated by using Matlab and ANSYS software. The results show that the three-dimensional random aggregate geometric model and real Aggregate is very close to improve the generation efficiency of random aggregate model, which provides an effective modeling method for other numerical simulation of concrete structure.