GFRP加固损伤钢筋混凝土（RC）短梁受弯性能试验研究

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发布时间：2020-01-06 00:00:00

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GFRP加固损伤钢筋混凝土（RC）短梁受弯性能试验研究

Experimental Study on Flexural Behavior of Damaged Reinforced Concrete(RC) Short Beams Strengthened with GFRP Sheets

2022年第10期

GFRP布；加固；钢筋混凝土（RC）短梁；损伤荷载；受弯性能

GFRP sheet; Strengthen; Reinforced concrete(RC) short beam; Damage load; Flexural performance

2022年第10期

10.19761/j.1000-4637.2022.10.065.06

河南省自然科学青年基金项目（212300410193）；中国地震局工程力学研究所基本科研业务费专项资助项目（2020EEEVL0411）。

吴玉祥，王廷彦，赵顺波

华北水利水电大学，河南郑州450045

吴玉祥，王廷彦，赵顺波

吴玉祥,王廷彦,赵顺波.GFRP加固损伤钢筋混凝土（RC）短梁受弯性能试验研究[J].混凝土与水泥制品,2022(10):65-69,73.

WU Y X,WANG T Y,ZHAO S B.Experimental Study on Flexural Behavior of Damaged Reinforced Concrete(RC) Short Beams Strengthened with GFRP Sheets[J].China Concrete and Cement Products,2022(10):65-69,73.

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摘要：对GFRP布加固未损伤和损伤普通钢筋混凝土（RC）短梁进行了受弯试验，研究了其破坏形态、材料（混凝土、钢筋、GFRP布）应变、抗弯承载力、挠度、曲率和抗弯刚度。结果表明：GFRP布加固未损伤和损伤RC短梁的极限破坏特征一致，破坏时GFRP布被拉断，受压区混凝土未被压碎，属于延性破坏；GFRP布加固未损伤和损伤RC短梁的跨中截面混凝土应变均近似符合平截面假定；GFRP布加固未损伤和损伤RC短梁的荷载-挠度曲线分别呈三阶段和两阶段特征，GFRP布加固损伤RC短梁的荷载-挠度曲线没有开裂阶段，试件的极限承载力得到一定提高；采用GFRP布加固可提高试件的刚度，但会降低其延性；对比GFRP布加固未损伤RC梁，GFRP布加固损伤RC梁的延性提高。 Abstract: Through the flexural tests on undamaged and damaged ordinary reinforced concrete(RC) short beams strengthened with GFRP sheets, the failure modes, material(concrete, steel bar, GFRP sheet) strain, flexural capacity, deflection, curvature and flexural stiffness were studied. The results show that the ultimate failure characteristics of the undamaged and damaged RC short beams strengthened with GFRP sheets are the same, both belong to the ductility failure in which the GFRP sheets are pulled off and the concrete in the compression zone is not crushed. The concrete strains of the mid-span section of the undamaged and damaged RC short beams strengthened with GFRP sheets are approximately consistent with the assumption of plane section. The load-deflection curves of the undamaged and damaged RC short beams strengthened with GFRP sheets are three stages and two stages respectively, and the load-deflection curve of the damaged RC short beams strengthened with GFRP sheets has no cracking stage, and the ultimate bearing capacity of the specimen is improved to a certain extent. Using GFRP sheets can improve the stiffness of the specimen, but it will reduce its ductility. Compared with the undamaged RC short beams strengthened with GFRP sheets, the ductility of the damaged RC short beams strengthened with GFRP sheets is improved.

英文名 : Experimental Study on Flexural Behavior of Damaged Reinforced Concrete(RC) Short Beams Strengthened with GFRP Sheets

刊期 : 2022年第10期

关键词 : GFRP布；加固；钢筋混凝土（RC）短梁；损伤荷载；受弯性能

Key words : GFRP sheet; Strengthen; Reinforced concrete(RC) short beam; Damage load; Flexural performance

刊期 : 2022年第10期

DOI : 10.19761/j.1000-4637.2022.10.065.06

文章编号 :

基金项目 : 河南省自然科学青年基金项目（212300410193）；中国地震局工程力学研究所基本科研业务费专项资助项目（2020EEEVL0411）。

作者 : 吴玉祥，王廷彦，赵顺波

单位 : 华北水利水电大学，河南郑州450045

吴玉祥，王廷彦，赵顺波

吴玉祥,王廷彦,赵顺波.GFRP加固损伤钢筋混凝土（RC）短梁受弯性能试验研究[J].混凝土与水泥制品,2022(10):65-69,73.

WU Y X,WANG T Y,ZHAO S B.Experimental Study on Flexural Behavior of Damaged Reinforced Concrete(RC) Short Beams Strengthened with GFRP Sheets[J].China Concrete and Cement Products,2022(10):65-69,73.

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摘要

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参考文献

引用本文

Abstract: Through the flexural tests on undamaged and damaged ordinary reinforced concrete(RC) short beams strengthened with GFRP sheets, the failure modes, material(concrete, steel bar, GFRP sheet) strain, flexural capacity, deflection, curvature and flexural stiffness were studied. The results show that the ultimate failure characteristics of the undamaged and damaged RC short beams strengthened with GFRP sheets are the same, both belong to the ductility failure in which the GFRP sheets are pulled off and the concrete in the compression zone is not crushed. The concrete strains of the mid-span section of the undamaged and damaged RC short beams strengthened with GFRP sheets are approximately consistent with the assumption of plane section. The load-deflection curves of the undamaged and damaged RC short beams strengthened with GFRP sheets are three stages and two stages respectively, and the load-deflection curve of the damaged RC short beams strengthened with GFRP sheets has no cracking stage, and the ultimate bearing capacity of the specimen is improved to a certain extent. Using GFRP sheets can improve the stiffness of the specimen, but it will reduce its ductility. Compared with the undamaged RC short beams strengthened with GFRP sheets, the ductility of the damaged RC short beams strengthened with GFRP sheets is improved.

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