钢纤维高强混凝土承台裂缝与破坏形态分析

Crack Development and Damage Analysis of Steel Fiber Reinforced High Strength Concrete Pile Caps

通过钢筋钢纤维高强混凝土四桩桩基承台模型试验,分析了承台从加载到破坏全过程裂缝的发展规律,包括承台侧面、底面、顶面裂缝的出现,裂缝的发展和裂缝宽度的变化以及破坏时裂缝的分布形态。结果表明:钢筋钢纤维高强混凝土四桩承台裂缝形态随着钢纤维体积率、配筋率、配筋方式的不同而变化,承台破坏时呈现出弯曲破坏构件的裂缝特征。

Based on the experiments of model specimens of SFHSC four-pile caps, the development law of crack that occurs from initial loading to damage load was found out, which clarified the crack appearance, crack development, crack pattern on failure and the changing of crack width, including the surface crack at the side, top or bottom of the pile cap. The result indicates that the crack pattern varies with the volume fraction of steel fiber, the reinforcement ratio of pile cap and the reinforcement layout. When the pile caps are destroyed, it appears the distribution characteristic of the bending failure components.