BFRP条带-PVC管材复合加固纤维再生混凝土短柱轴压性能  

Axial compression performance of BFRP strip-PVC tube composite reinforced fiber recycled concrete short columns

作　　者：徐冬梅 刘华新[2] 李艳 XU Dongmei;LIU Huaxin;LI Yan(School of Architecture Engineering,Liaoning Vocational University of Technology,Jinzhou 121001,China;School of Civil Engineering and Architecture,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁理工职业大学建筑学院,锦州121001 [2]辽宁工业大学土木建筑工程学院,锦州121001

出　　处：《复合材料科学与工程》2024年第6期95-105,共11页Composites Science and Engineering

基　　金：辽宁省教育厅科学基金项目(SYZY202005)。

摘　　要：为了研究BFRP条带-PVC管材复合加固纤维再生混凝土短柱的轴心抗压性能,对13组再生混凝土短柱进行了轴压试验和理论分析。主要研究变量为BFRP条带层数(0层、1层、3层)、BFRP间距(25 mm、37.5 mm和50 mm)和加固方式(无侧向约束、BFRP条带加固和BFRP条带-PVC管材复合加固)。研究结果表明:BFRP条带-PVC管复合加固不仅可以提高试件的极限承载力,还可以改善纤维再生混凝土短柱的破坏形态。在应力-应变曲线的非线性强化阶段,加固方式对试件刚度的影响更为显著。随着BFRP包裹量的增加,试件的峰值应力和极限应变均明显增加。依据试验数据建立的软化段的应力-应变计算模型具有较好的适用性。To investigate the axial compressive performance of short columns of BFRP strip-PVC tube composite reinforced fiber recycled concrete.Axial compression tests and theoretical analysis were conducted on 13 groups of short columns of recycled concrete.The main variables studied were the number of BFRP strip layers(0,1 and 3 layers),BFRP spacing(25 mm,37.5 mm and 50 mm),and reinforcement methods(no lateral restraint,BFRP strip reinforcement,and BFRP strip-PVC tube composite reinforcement).The results show that the BFRP strip-PVC tube composite reinforcement can not only improve the ultimate bearing capacity of the specimens,but also improve the damage morphology of the short columns of fiber-reinforced concrete.In the nonlinear strengthening phase of the stress-strain curve,the influence of the reinforcement method on the stiffness of the specimen is more significant.With the increase of BFRP wrapping,the peak stress and ultimate strain of the specimens were significantly increased.The stress-strain calculation model of the softened section established based on the test data has better applicability.

关 键 词：纤维再生混凝土 BFRP条带-PVC管 轴压性能 应力-应变模型 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]