玄武岩纤维布加固钢筋混凝土短梁抗弯性能试验研究  

Experimental Study on Flexural Performance of Reinforced Concrete Short Beams Strengthened by BFRP Sheets

作　　者：王廷彦[1] 张军伟[2] WANG Ting-yan;ZHANG Jun-wei(North China University of Water Resources and Electric Power,Zhengzhou 450045,China;Henan Agricultural University,Zhengzhou 450002,China)

机构地区：[1]华北水利水电大学,郑州450045 [2]河南农业大学,郑州450002

出　　处：《混凝土与水泥制品》2020年第4期68-72,76,共6页China Concrete and Cement Products

基　　金：河南省高等学校重点科研项目（19B560003）

摘　　要：通过3根玄武岩纤维(Basalt fiber reinforced polymer,简称BFRP)布加固钢筋混凝土短梁的抗弯试验,研究了纤维布层数对加固梁抗弯性能的影响。结果表明,加固梁和普通梁均较符合平截面假定;随纤维布层数的增加,试件的开裂、屈服和极限荷载均增加,加固梁的破坏都为纤维布拉断破坏;钢筋屈服后,纤维布加固可以显著提高加固梁的抗弯刚度,表明纤维布在此阶段发挥的作用最大;普通梁的延性最好,随纤维布层数的增加,加固梁的延性逐渐降低。Based on the bending tests of three reinforced concrete short beams strengthened with basalt fiber sheets,the effects of layers on the bending properties of strengthened beams were studied.The results show that the strengthened beams and ordinary beams are more in line with the assumption of flat section.With the increase of the number of layers of fiber cloth,the cracking,yield and ultimate load of the specimens increase,and the failure of the strengthened beams is the breaking failure of fiber sheet.After the steel bar yields,the flexural stiffness of the strengthened beams can be significantly improved by the fiber sheet,which indicates that the fiber sheet plays the most important role in this stage.The ductility of ordinary beams is the best,and the ductility of reinforced beams decreases gradually with the increase of fiber layers.

关 键 词：玄武岩纤维布 加固 钢筋混凝土 短梁 抗弯试验 

分 类 号：TU528.01[建筑科学—建筑技术科学]