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本文以试验为基础,讨论了两相不均质模型的断裂。对模型的裂缝起裂和开展进行了描述和分析。认识到混凝土局部的结构特征对于探讨其破坏过程和断裂机理是很重要的。骨料相的存在使基相中的裂缝起裂容易了,骨料离裂缝尖端越近,这种影响越显著,但裂缝的进一步发展又受到骨料的阻碍。局部的裂缝发展是伴随裂缝型式(Ⅰ型张开、Ⅱ型剪开)的不断复合和转化,不均质性对裂缝发展的阻止作用也是随之变化的。由此分析,对混凝土的断裂机理也有了进一步的认识。
Based on experiments, this paper discusses the fracture of the two-phase heterogeneous model. The crack initiation and development of the model are described and analyzed. It is important to recognize that the structural characteristics of the concrete in the concrete are to discuss the failure process and the fracture mechanism. The existence of the aggregate phase makes the fractures in the basic phase easy to crack, and the closer the aggregate is to the tip of the fracture, the more significant this effect is, but the further development of the fracture is hindered by aggregates. The development of local fractures is accompanied by the continuous recombination and transformation of fracture types (I-type opening and II-type cutting), and the inhibitory effect of the heterogeneity on the development of cracks also changes. From this analysis, a further understanding of the fracture mechanism of concrete has been obtained.