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（1 華北水利水電大學(xué)土木與交通學(xué)院， 鄭州 450045；  2 河南農(nóng)業(yè)大學(xué)基建處， 鄭州 450002）

［摘要］通過7根碳纖維布（CFRP）加固鋼筋混凝土短梁受彎試驗(yàn)，研究了混凝土強(qiáng)度、縱筋配筋率和纖維布層數(shù)對加固短梁受彎性能的影響。試驗(yàn)結(jié)果表明：隨縱筋配筋率和纖維布層數(shù)增加，加固短梁的破壞逐漸向超筋梁特征發(fā)展；跨高比為4的短梁均較符合平截面假定；隨縱筋配筋率的增加，相同加固量的短梁延性逐漸減??；隨縱筋配筋率和纖維布層數(shù)的增加，加固短梁的極限荷載顯著提高。

［關(guān)鍵詞］碳纖維布； 加固； 鋼筋混凝土； 短梁； 受彎性能

中圖分類號(hào)：TU375-1, TU528-01文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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