BFRP布加固损伤钢筋混凝土短梁的抗弯性能研究

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发布时间：2020-01-06 00:00:00

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BFRP布加固损伤钢筋混凝土短梁的抗弯性能研究

Experimental study on flexural behavior of damaged reinforced concrete short beams strengthened with BFRP cloth

2023年第8期

BFRP布；钢筋混凝土短梁；损伤荷载；抗弯试验

BFRP cloth; Reinforced concrete short beam; Damage load; Bending test

2023年第8期

10.19761/j.1000-4637.2023.08.042.06

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）；河南省自然科学青年基金项目（212300410193）。

张军伟1，王廷彦2,3，吴玉祥3

1.河南农业大学基建处，河南郑州 450002；2.广州大学土木工程学院，广东广州 510006； 3.华北水利水电大学土木与交通学院，河南郑州 450045

张军伟1，王廷彦2,3，吴玉祥3

张军伟,王廷彦,吴玉祥.BFRP布加固损伤钢筋混凝土短梁的抗弯性能研究[J].混凝土与水泥制品,2023(8):42-47.

ZHANG J W,WANG T Y,WU Y X.Experimental study on flexural behavior of damaged reinforced concrete short beams strengthened with BFRP cloth[J].China Concrete and Cement Products,2023(8):42-47.

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1000

摘要：通过对3根试件进行抗弯性能试验，研究了普通RC短梁、BFRP布加固未损伤及损伤钢筋混凝土短梁的破坏形态、材料应变、受弯承载力等变化规律。结果表明：BFRP布加固未损伤及损伤RC短梁的极限破坏模式一致，均为BFRP布先被拉断，受压区混凝土未被压碎；与普通RC短梁一致，加固后的试件跨中截面混凝土应变均近似符合平截面假定；BFRP布加固损伤RC短梁的荷载-挠度曲线不存在开裂阶段，且加固后，损伤RC短梁的极限承载力比未损伤RC短梁和普通RC短梁的极限承载力稍高；BFRP布加固未损伤RC短梁可提高试件刚度，降低试件延性；BFRP布加固损伤RC短梁也可提高试件刚度，但不会降低试件延性。 Abstract: Based on the bending performance tests of three RC short beams, the failure morphology, material strain, flexural bearing capacity, etc. of ordinary RC short beams and BFRP cloth reinforced undamaged and damaged RC short beams were studied. The results show that the ultimate failure modes of undamaged and damaged RC short beams strengthened with BFRP cloth are consistent, with BFRP cloth being pulled first and the concrete in the compression zone not being crushed. The strain of the mid span concrete of both undamaged and damaged reinforced concrete short beams strengthened with BFRP cloth is approximately consistent with the assumption of a flat section as the ordinary RC short beams. The load-deflection curve of BFRP cloth reinforced damaged RC short beams lackes cracking stage. The ultimate bearing capacity of damaged RC short beams is slightly higher than that of reinforced undamaged RC short beams and the ordinary reinforced concrete short beams. After the undamaged short beam is reinforced with BFRP cloth, the stiffness of the specimen can be increased and the ductility of the specimen can be reduced. After the damaged short beam is reinforced with BFRP cloth, its stiffness can also be increased, but the ductility of can not be reduced.

英文名 : Experimental study on flexural behavior of damaged reinforced concrete short beams strengthened with BFRP cloth

刊期 : 2023年第8期

关键词 : BFRP布；钢筋混凝土短梁；损伤荷载；抗弯试验

Key words : BFRP cloth; Reinforced concrete short beam; Damage load; Bending test

刊期 : 2023年第8期

DOI : 10.19761/j.1000-4637.2023.08.042.06

文章编号 :

基金项目 : 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）；河南省自然科学青年基金项目（212300410193）。

作者 : 张军伟1，王廷彦2,3，吴玉祥3

单位 : 1.河南农业大学基建处，河南郑州 450002；2.广州大学土木工程学院，广东广州 510006； 3.华北水利水电大学土木与交通学院，河南郑州 450045

张军伟1，王廷彦2,3，吴玉祥3

张军伟,王廷彦,吴玉祥.BFRP布加固损伤钢筋混凝土短梁的抗弯性能研究[J].混凝土与水泥制品,2023(8):42-47.

ZHANG J W,WANG T Y,WU Y X.Experimental study on flexural behavior of damaged reinforced concrete short beams strengthened with BFRP cloth[J].China Concrete and Cement Products,2023(8):42-47.

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摘要

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结论

参考文献

引用本文

Abstract: Based on the bending performance tests of three RC short beams, the failure morphology, material strain, flexural bearing capacity, etc. of ordinary RC short beams and BFRP cloth reinforced undamaged and damaged RC short beams were studied. The results show that the ultimate failure modes of undamaged and damaged RC short beams strengthened with BFRP cloth are consistent, with BFRP cloth being pulled first and the concrete in the compression zone not being crushed. The strain of the mid span concrete of both undamaged and damaged reinforced concrete short beams strengthened with BFRP cloth is approximately consistent with the assumption of a flat section as the ordinary RC short beams. The load-deflection curve of BFRP cloth reinforced damaged RC short beams lackes cracking stage. The ultimate bearing capacity of damaged RC short beams is slightly higher than that of reinforced undamaged RC short beams and the ordinary reinforced concrete short beams. After the undamaged short beam is reinforced with BFRP cloth, the stiffness of the specimen can be increased and the ductility of the specimen can be reduced. After the damaged short beam is reinforced with BFRP cloth, its stiffness can also be increased, but the ductility of can not be reduced.

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BFRP布加固损伤钢筋混凝土短梁的抗弯性能研究

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