混凝土及纤维混凝土材料特性曲线

混凝土及纤维混凝土压缩试验的载荷变形关系曲线和裂纹载荷张开位移关系曲线分别具有两类不同的形貌特点。根据混凝土及纤维混凝土材料的弯曲和轴压特性曲线与混凝土断裂特性试验结果，建立了能够反映其曲线特征和材料性能变化的两类函数表达公式，提出了确定两类曲线方程中待定参数的计算方法，给出了公式在多种情况下材料特性表达中的应用和分析讨论，材料特性理论曲线与实验结果吻合较好。

Characteristic curve of concrete and fiber reinforced concrete

The curves of relationship between load and deformation, or/and between load and crack opening displacement for concrete and fiber reinforced concrete, have two types of visual characters. According to the curves of tested concrete and fiber reinforced concrete under bending or compressing load, the concrete fracture characteristic curves, two types of function formulae are established, which can show the characters of these curves. The methods of identifying two indexes of the analytical formulae are presented. The applications of the formulae in expressing concrete properties to practice and associated discussions are also given in this paper.