摘要
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.
引文
[1]叶列平,冯鹏,林旭川,等.配置FRP的结构构件的安全储备指标及分析[J].土木工程学报,2009(9):21-31.
[2]吕西林,张颖,年学成.钢纤维高强混凝土在单调和重复荷载作用下轴压应力-应变曲线试验研究[J].建筑结构学报2017,38(1):135-143.
[3]潘慧敏,马云朝.钢纤维混凝土抗冲击性能及其阻裂增韧机理[J].建筑材料学报,2017(6):21-25.
[4]刘申永,刘中宪,徐慎春,等.钢筋钢纤维高强混凝土柱横向承载静力试验研究[J].建筑结构,2016(4):74-78.
[5]徐礼华,邓方茜,徐浩然,等.钢-聚丙烯混杂纤维混凝土柱抗震性能试验研究[J].土木工程学报,2016,49(1):3-13.
[6]程晟钊.BFRP筋钢纤维复合增强高强混凝土梁受弯性能研究[D].郑州:郑州大学,2018.
[7]Jeong S M,Naaman A E.Ductility of Concrete Beams Prestressed with FRP Tendons[C].FRP Composites in Civil Engineering International Conference on Frp Composites in Civil Engineering,2010.
[8]祁皑,翁春光.FRP筋混凝土梁延性性能试验研究[J].工程抗震与加固改造,2007,29(5):63-67.
[9]杨学山.工程振动测量仪器和测试技术[M].北京:中国质检出版社,2001.
[10]过镇海.钢筋混凝土原理[M].北京:清华大学出版社,2013.