CFRP布加固钢筋混凝土短梁受弯性能试验研究  

Experimental study on the flexural performance of RC short beam strengthened by CFRP sheets

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

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

出　　处：《混凝土》2020年第9期31-36,共6页Concrete

基　　金：国家自然科学基金项目(50579068);河南省高等学校重点科研项目(19B560003)。

摘　　要：通过5根碳纤维(carbon fiber reinforced polymer,CFRP)布加固钢筋混凝土短梁的受弯性能试验,研究了跨高比对CFRP布加固钢筋混凝土短梁受弯性能的影响。试验结果表明:随跨高比的增大,沿梁截面高度方向的混凝土应变逐渐符合平截面假定;跨高比较小的试件加固后其延性反而较大;加固梁受力的整个过程中,碳纤维布在钢筋屈服后发挥的作用最大;随跨高比的减小,CFRP布加固钢筋混凝土短梁的极限荷载显著增加。The flexural tests of five reinforced concrete beams strengthened by carbon fiber reinforced polymer(CFRP)sheets were conducted to investigate the influences of span-depth ratio on flexural performance.The experimental results show that:with the increase of the span depth ratio,concrete strain along the height of beam section gradually conforms to the assumption of the plane section;the ductility of the specimen with relatively small span-depth ratio is larger after reinforcement;the whole process of beam reinforcement,carbon fiber reinforced play in the biggest role after the Longitudinal reinforcement yield;with the decrease of span-depth ratio,the ultimate load of reinforced concrete short beams strengthened with CFRP cloth increases significantly.

关 键 词：碳纤维布 加固 钢筋混凝土 短梁 受弯试验 

分 类 号：TU528.01[建筑科学—建筑技术科学]