BFRP筋海砂再生混凝土柱轴压性能研究

Axial compression behavior of BFRP reinforced concrete columns with sea-sand and recycled aggregate

通过30根BFRP筋海砂再生混凝土(Sea-sand recycled aggregate concrete,SRAC)柱的轴心受压试验,探究BFRP纵筋配筋率、BFRP箍筋间距和再生骨料取代率等因素的影响。试验发现:BFRP筋柱的破坏过程与钢筋混凝土柱较为相似。随着混凝土中再生砖骨料含量的增加,试件承载力相应降低;为提高柱承载力,当其他参数相同时,可适当提高BFRP纵筋配筋率;减小箍筋间距,试件延性明显改善,但承载力提高幅度较小。

Based on the axial compression tests of thirty BFRP reinforced concrete columns with sea-sand and recycled aggregate,the effects of BFRP longitudinal reinforcement ratio,spiral stirrup spacing and recycled aggregate replacement rate were investigated.The results show that the BFRP reinforced columns are similar to the reinforced concrete columns in the failure process.As the replacement rate of recycled aggregate increases,the loading capacity decreases.In order to improve the loading capacity of columns,the reinforcement ratio of BFRP longitudinal reinforcement can be appropriately increased under the same other parameters.Reducing the stirrup spacing,the ductility of the specimen is obviously improved,but it has little effect on the bearing capacity.