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混凝土常被看作两相的复合材料,即骨料和水泥砂浆。由于骨料和水泥砂浆不同的力学特性,在外荷载作用下会呈现出对拉应力比较敏感的准脆性变形和破坏特征。该研究针对混凝土的这一特性,将混凝土看作两相材料,利用FLAC~(3D)模拟其弹脆性破坏过程,探索混凝土试件在外荷载作用下的断裂破坏过程。研究成果揭示了混凝土的细观力学机制,对实际工程有重要的参考意义。
Concrete is often seen as a two-phase composite material, aggregate and cement mortar. Due to the different mechanical properties of aggregate and cement mortar, under the action of external load, the brittle deformation and failure characteristics are more sensitive to tensile stress. According to this characteristic of concrete, concrete is considered as a two-phase material. FLAC 3D is used to simulate the brittle failure process and to explore the failure process of concrete specimens under external loads. The research results reveal the mechanism of meso-mechanics of concrete, and have important reference significance for practical engineering.