【摘要】 针对混凝土单轴压缩破碎后的分形特征进行了研究。依据Turcotte研究成果,对混凝土破碎分形维数进行了定量计算。分析了粗骨料粒径、试样形状对混凝土破碎分形维数的影响,探讨了抗压强度、峰值应变、单位体积吸收能、脆性指标与破碎分形维数的关系。结果表明:混凝土单轴压缩破坏后的碎块分布具有分形特征;单轴压缩破碎分形维数随粗骨料粒径的增大呈下降趋势,随混凝土抗压强度的提高呈增大趋势,随峰值应变的提高、单位体积吸收能的增加、脆性指标的减小而增大;圆柱体试样的破碎分形维数与同粒径的棱柱体试样相比呈降低趋势。更多还原

【Abstract】 The fractal characteristics of concrete after crushing under uniaxial compression were studied. Based on the research results of Turcotte, the fractal dimension of concrete fragmentation was calculated quantitatively. The influence of coarse aggregate size and specimen shape on fractal dimension of concrete crushing were analyzed, and the relationship between compressive strength, peak strain, unit volume absorption energy, brittleness index and fractal dimension of concrete crushing were discussed. The results show that the distribution of fragments after uniaxial compression failure of concrete has fractal characteristics. The fractal dimension of uniaxial compressive crushing decreases with the increase of coarse aggregate size, but increases with the increase of compressive strength, peak strain and unit volume absorption energy. While it increases with the decrease of brittle index. The breaking fractal dimension of cylinder sample is lower than that of prism sample with the same size.更多还原