钢纤维混凝土的增强机理与断裂力学模型研究

钢纤维因其能为基体裂纹提供桥联而经常被用于增强水泥基材料。为了更好地了解钢纤维混凝土这类复合材料的断裂行为，重点讨论了钢纤维混凝土的增强机理以及裂纹尖端微裂区的力学行为。在一系列理论分析与实验观察的基础上，提出了一个新的钢纤维混凝土材料断裂力学模型，给出了一些有工程实用价值的结论。

Study on the Reinforcement Mechanism and Fracture Mechanics Model of Steel Fiber Reinforced Concrete

Steel fiber is often used to reinforce cemented materials because it can provide bridging effect of crack in matrix. In order to better understand the fracture behavior of such composite materials of steel fiber reinforced concrete, the reinforcment mechanism and the mechanical behavior of crack tip micro-crack zone for steel fiber reinforced concrete are analyzed in this paper. Based on a series of theoretical analysis and experimental observation, a new fracture mechanics model of steel fiber reinforced concrete materials is presented, and some conclusions of practical value to engineering application are given at the same time.