FRP筋钢纤维混凝土梁延性性能研究

Research on Ductility of Steel Fiber Concrete Beams Reinforced with FRP Bars

以钢纤维体积率(0、0.5%、1.0%、1.0%/0)以及玻璃纤维增强复合材料筋(GFRP筋)和碳纤维增强复合材料筋(CFRP筋)两种筋材为试验变量,进行了6根纤维增强复合材料筋(FRP筋)混凝土构件的受弯性能试验,用以评价钢纤维体积率对FRP混凝土构件的延性提升效果。试验结果表明,随着钢纤维掺量的添加,FRP筋混凝土梁的延性指标提升了16%～48%,极限承载力提高了5%～13%,说明钢纤维的掺加对FRP筋混凝土梁的延性指标和承载力有积极作用。

To evaluate the ductility lifting effect of steel fiber volume ratio on FRP concrete members. The flexural behavior tests of six concrete members with FRP bars are carried out by taking the volume ratio of steel fiber (0 and 0.5%) and the ratio of 0 to 1.0%, as well as two kinds of steel bars, GFRP tendons and CFRP tendons, as experimental variables. The test results show that with the increase of steel fiber content, the ductility index of FRP reinforced concrete beams increases by about 16%-48%, and the ultimate bearing capacity increases by 5%-13%. It is shown that the addition of steel fiber has a positive effect on the ductility index and bearing capacity of concrete beams with FRP bars.