Review of Key Issues in FRP-confined Concrete

被引：0
|
作者：
Xiang Z. [1 ,2 ]
Wang J. [1 ]
Niu J. [1 ]
Zhou J. [1 ]
机构：
[1] Department of Civil Engineering, Inner Mongolia University of Science and Technology, Inner Mongolia, Baotou
[2] Inner Mongolia Naiheng Engineering Technology Co., Ltd., Inner Mongolia, Baotou
来源：
Cailiao Daobao/Materials Reports | 2023年 / 37卷 / 01期
基金：
中国国家自然科学基金;
关键词：
constitutive iteration; fiber reinforced polymer; peak strain model; peak stress model; rupture stain;
D O I：
10.11896/cldb.20110045
中图分类号：
学科分类号：
摘要：
In this paper, we performed an international literature review of fiber reinforced polymer (FRP) concrete. 29 peak stress models and 19 peak strain models of FRP-confined concrete were selected, and the accuracy of the models was verified according to the relevant measured data from peer-reviewed data. The results show that the prediction accuracy of these models for the strongly-confined concrete is inadequate. Therefore, we offer a relatively simple peak stress and strain model with better accuracy by piecewise fitting. Based on the literature, the two factors that affect the radial constraint force are elastic modulus of FRP and rupture strain. We suggest that: (1) compared with low elastic modulus FRP, high elastic modulus FRP can delay the damage of concrete and improve the mechanical properties of concrete in the core zone, (2) construction disturbance, stress difference and material heterogeneity decrease FRP rupture strain, (3) for carbon fiber reinforced polymer (CFRP), glass fiber reinforced polymer (GFRP), and aramid fiber reinforced polymer (AFRP), the effective coefficient of rupture strains are 0. 723, 0. 774, and 0. 774, respectively. The purpose of this paper is to provide reference for the extended application of FRP-confined concrete. © 2023 Cailiao Daobaoshe/ Materials Review. All rights reserved.
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