Analyses Ⅲ crack creep fracture under the influence of the initial co-linear array of microcracks antiplane using macrocrack-microcrack inteaction model and the theory of stress intensity factors for creep fracture, and presents the relation between the concrete antiplane Ⅲ crack stress intensity factors for creep fracture and the initial stress intensity factors was obtained.%在工程中,特别是对长期持续荷载作用下带裂纹的构件,裂纹扩展寿命的预测是一个十分重要的问题.由于混凝土、岩石等材料中存在着大量的初始微裂纹,要研究这一类材料断裂问题就必须研究主裂纹与微裂纹之间的相互作用.依据宏观裂纹一微裂纹相互作用模型和蠕变断裂应力强度因子理论,对具有初始等距共线微裂纹列影响的反平面Ⅲ型裂纹体的蠕变断裂问题进行了分析.并给出了混凝土Ⅲ型裂纹体的蠕变断裂应力强度因子与裂纹体初始应力强度因子的关系.
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