BFRP筋与蒸养混凝土粘结性能研究  

STUDY ON THE BOND PERFORMANCE BETWEEN BFRP BARS AND STEAM CURING CONCRETE

作　　者：万朝阳[1] 陈国新[1] 陈磊[1] 王康[1] 

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052

出　　处：《玻璃钢／复合材料》2016年第8期57-61,49,共6页Fiber Reinforced Plastics/Composites

基　　金：国家"十二五"科技支撑计划课题(2013BAJ12B05);新疆维吾尔自治区优秀青年科技创新人才培养项目(2014721012)

摘　　要：为研究BFRP筋与混凝土粘结性能,将BFRP筋混凝土试件蒸养8h后再各标养3d及28d,对试件进行中心拉拔试验。研究不同龄期试件破坏形态及试件粘结强度随混凝土强度和粘结长度变化的规律,利用1st Opt软件对试件粘结强度与影响因素关系进行二次非线性曲面拟合。结果表明,试件主要破坏形态为BFRP筋拔出和混凝土劈拉破坏;与粘结长度相比,混凝土强度对不同龄期试件的粘结强度影响较显著,C40比C25增幅达29.1%,17.5d比7.5d降幅达21.4%;1st Opt软件拟合的粘结强度公式为确定不同混凝土强度、不同粘结长度下试件不同龄期的粘结强度值提供理论依据。In order to study the bond performance of BFRP bars and concrete,BFRP bars concrete specimens were steamed 8 h and then cured 3 d and 28 d,respectively. After that,the center pull out of specimens was tested.On the basis of specimens＇ failure pattern in different age and the change rule of specimens＇ bond strength between concrete strength and bond length,1st Opt software was used to test quadratic nonlinear curved surface fitting relationship between specimens＇ bond strength and influencing factors. The results showed that the main failure pattern of specimens were pulled-out of BFRP bars and split tensile failure of concrete. Compared with the bond length,the bond strength of concrete strength was significantly influenced by the strength of concrete at different age. Compared with C25,the bond strength of C40 was increased by 29. 1%,and compared with 7. 5 d,the bond strength of 17. 5 d was decreased by 21. 4%. The bond strength formula of 1st Opt software fitting is the theoretical basis for the bond strength of different concrete strength and different bond length.

关 键 词：BFRP筋 粘结性能 拉拔试验 粘结强度 破坏形态 混凝土强度 粘结长度 

分 类 号：TB332[一般工业技术—材料科学与工程]