PBO纤维和碳纤维混杂增强混凝土抗弯曲性能研究

Study on the Flexure Properties of PBO/CF Hybrid Reinforced Concrete

采用PBO纤维与碳纤维混杂复合材料片材增强加固混凝土,设计了3种混杂比的复合材料片材对混凝土进行增强实验,采用3点抗弯曲试验测试纤维片材对混凝土抗弯曲性能增强效果。结果表明,掺有纤维片材的混凝土抗弯曲强度比素混凝土明显提高,两种纤维层间混杂增强后抗弯曲强度呈现出正的混杂效应,破坏形式由素混凝土的脆性断裂转变纤维混凝土的层间韧性断裂。

In this paper, the concrete construction was reinforced with PBO fiber and carbon fiber composite sheets. Three hybrid kinds of the two fibers have been designed and the flexure properties of the concrete construction are studied using three-point bend method. The result indicates that the bending strength of the reinforced concrete is obviously higher than that of the plain one, and PBO fiber and carbon fiber hybrid reinforced concrete has the high- est bending strength among the all concrete constructions. It is expected, the formal rupture changes from brittleness of the plain concrete construction to toughness of the reinforced concrete construction.