（1 华北水利水电大学土木与交通学院， 郑州 450045；  2 河南农业大学基建处， 郑州 450002）

［摘要］通过7根碳纤维布（CFRP）加固钢筋混凝土短梁受弯试验，研究了混凝土强度、纵筋配筋率和纤维布层数对加固短梁受弯性能的影响。试验结果表明：随纵筋配筋率和纤维布层数增加，加固短梁的破坏逐渐向超筋梁特征发展；跨高比为4的短梁均较符合平截面假定；随纵筋配筋率的增加，相同加固量的短梁延性逐渐减小；随纵筋配筋率和纤维布层数的增加，加固短梁的极限荷载显著提高。

［关键词］碳纤维布； 加固； 钢筋混凝土； 短梁； 受弯性能

中图分类号：TU375-1, TU528-01文献标识码：A文章编号：1002-848X(2020)02-0076-06

Experimental study on flexural performance of reinforced concrete short beams strengthened by carbon fiber reinforced polymer sheets

Wang Tingyan1, Zhang Junwei2

(1 School of Civil and Transportation, North China University of Water Resources and Electric Power, Zhengzhou 450045, China; 2 Capital Construction Department, Henan Agricultural University, Zhengzhou 450002, China)

Abstract:The flexural tests of seven reinforced concrete short beams strengthened by carbon fiber reinforced polymer (CFRP) sheets were conducted to investigate the influences of concrete strength, longitudinal reinforcement ratio and CFRP layers on the flexural performance. The experimental results show that: with the increase of longitudinal reinforcement ratio and number of layers of sheets, the failure of the strengthened short beams gradually develops to the features of the over-reinforced beams; the short beam with span-depth ratio of 4 accords with the flat section assumption; the ductility of short beams with the same strengthening measures decreases with the increase of the longitudinal reinforcement ratio; with the increase of longitudinal reinforcement ratio and number of layers of sheets, the ultimate load of short beams strengthened with CFRP sheets increases significantly.

Keywords:carbon fiber reinforced polymer; strengthening; reinforced concrete; short beam; bending performance