纤维增强水泥基复合材料的试验方法.使用圆板的荷载-挠度曲线

[中文适用范围]： 本文件规定了使用派生参数评估纤维增强水泥基复合材料（FRCC）弯曲性能的试验方法。这些参数是从通过内部加载环和外部支撑环之间的圆试样获得的载荷-变形曲线中推导出来的。该测试方法针对的是表现出双曲率强化行为的 FRCC，而不是那些表现出双曲率软化行为的材料。 [外文原描述]： This document specifies a test method for evaluating flexural performance of fibre-reinforced cementitious composites (FRCCs) using derived parameters. These parameters are derived from the load-deflection curve obtained by testing a circular specimen supported on a concentric ring and loaded by another ring with a smaller diameter. The performance of FRCCs tested by this method is characterized for biaxial properties. This test method provides for the determination of first-cracking load and the corresponding stress. It also provides for the determination of specimen toughness based on the area under the load-deflection curve up to the deflections at the first-cracking and peak loads. For determining the toughness value, this test method is intended primarily for use with FRCCs that exhibit deflection hardening behaviour. This test method is not intended for materials that exhibit deflection-softening behaviour.