摘   要：为研究混凝土强度、复合梁黏结面处理方法和PVA纤维水泥基复合材料层厚度对PVA增强混凝土复合梁弯曲性能的影响，对十二组100 mm×100 mm×400 mm的复合梁试件进行了四点弯曲试验,分析了试件破坏过程和弯曲性能。结果表明，与基体强度C30的普通混凝土梁相比，随着PVA纤维水泥基复合材料层厚度的增加，复合梁的极限荷载提高了26.7%～48.4%；与基体强度C40的普通梁相比，随着PVA纤维混凝土层厚度的增加，复合梁的极限荷载提高了15.7%～46.6%；随着基体混凝土强度等级的提高，复合梁的极限承载力得到明显提升；复合梁黏结面进行凿毛处理对其极限荷载有所提高。

Abstract: To study the effect of concrete strength, composite beam bonded surface treatment method and PVA fiber cement based composite material layer thickness on the properties of PVA reinforced concrete composite beam bending, the twelve groups of 100 mm×100 mm×400 mm composite beam specimen through the four-point bending test of specimen failure process and bending properties were analyzed. The results show that the ultimate load of the composite beam increases by 26.7% to 48.4% with the increase of the thickness of the PVA fibre-cement composite material layer compared with the common concrete beam with the strength of the matrix C30. The ultimate load of composite beams increases by 15.7% to 46.6% with the increase of PVA fiber concrete layer thickness compared with that of ordinary beams with matrix strength C40. With the improvement of the strength grade of the matrix concrete, the ultimate bearing capacity of the composite beam has been improved obviously. The ultimate load of composite beam is increased by chipping.