骨料粒径变化的混凝土梁断裂面的分形研究

摘要

通过在3根集中荷载作用下不同粒径的粗骨料混凝土简支梁的试验研究,采用分形理论对裂缝的萌发、扩展及分布特征进行分析.结果表明:试验梁的断裂面的自相似性可以用分形理论较好的描述,且试验梁的宏观力学量与其断裂面的分维数具有很强的相关性,可以用其断裂面的分维数表征其损伤程度.%Though experimental research on three RC (Reinforced Concrete) simple beams with the different of aggregates size under concentrated load was presented.By using fraetal theory,the crack opening,development and distributing of simple RC beams under concentrated load is analysed.The results indicate that the fracture surfaces of three RC beams have fractal behavior,especially on selfsimilarity.The fractal dimension of the fracture surfaces has a good relationship on the macroscopical mechanics of the RC simple beam,and it may show the destructive degree of the RC beam.