Experimental study on shear performance of RC beams strengthened with CFRP grid-PCM

被引：0
|
作者：
Pan Y. [1 ,2 ]
Cai L. [1 ]
Guo R. [1 ,3 ]
Hu W. [1 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
[2] Key Laboratory of Seismic Engineering of Sichuan Province, Southwest Jiaotong University, Chengdu
[3] Department of Civil Engineering, Kyushu University, Fukuoka
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2020年 / 41卷 / 04期
关键词：
CFRP grid; Finite element analysis; Polymer cement mortar; Reinforced concrete beam; Shear performance; Static test;
D O I：
10.14006/j.jzjgxb.2018.0421
中图分类号：
学科分类号：
摘要：
To investigate the shear performance of reinforced concrete (RC) beams strengthened with carbon fiber reinforced polymer (CFRP) grid and polymer cement mortar (PCM), two-point loading tests and finite element analysis (FEA) for three specimens were carried out. The main test variable was the strengthening scheme, whose effects on the failure mechanism and the shear performance of the strengthened RC beams were analyzed. The results show that the development of inclined cracks is effectively restrained by using CFRP grid-PCM for RC beams, and the shear capacity can be significantly improved to a certain extent. Compared to the specimen strengthened at the web only, the secondary stiffness and the ultimate load of the beam strengthened at both the web and the hunch are both increased to some extent. In addition, for the latter, the deformation of CFRP grid is reduced, and the bonding behavior on the interface between the composite layer and concrete substrates is improved. For FEA, it is feasible to predict the shear capacity of RC beams strengthened by CFRP grid using both concrete damaged plastic (CDP) and Spring2 models. Based on the effective strain of FRP rod, a new calculation method is developed to predict the shear capacity validly and the method can be also considered as a reference for the design of reinforced structures. © 2020, Editorial Office of Journal of Building Structures. All right reserved.
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页码：110 / 118
页数：8
相关论文
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