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材料导报  2023, Vol. 37 Issue (1): 20110045-8    https://doi.org/10.11896/cldb.20110045
  无机非金属及其复合材料 |
FRP约束混凝土关键问题综述
相泽辉1,2, 王俊1, 牛建刚1,*, 周杰1
1 内蒙古科技大学土木工程学院,内蒙古 包头 014010
2 内蒙古耐恒工程科技有限责任公司,内蒙古 包头 014010
Review of Key Issues in FRP-confined Concrete
XIANG Zehui1,2, WANG Jun1, NIU Jiangang1,*, ZHOU Jie1
1 Department of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia,China
2 Inner Mongolia Naiheng Engineering Technology Co., Ltd., Baotou 014010, Inner Mongolia,China
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摘要 本文从国内外文献中选取了29个纤维布(FRP)约束混凝土峰值应力模型和19个峰值应变模型,并依据诸多同行研究结果中的相关实测数据,对上述模型的精度进行了验证。结果表明,这些模型对强约束构件的预测精度不足,在此基础上,我们通过分段拟合得到了精度较优且较为简洁的峰值应力及应变模型。同时,基于文献数据,我们对影响环向约束力的FRP弹性模量及撕裂应变这两个因素进行了探讨。我们认为:(1)相较于低弹性模量,高弹性模量FRP可延缓混凝土损伤,进而提高核心区混凝土的力学性能;(2)导致FRP撕裂应变降低的原因包括施工扰动、受力差异及材质非均质性;(3)对于碳纤维增强复合材料(CFRP)、玻璃纤维增强复合材料(GFRP)和芳纶纤维增强复合材料(AFRG),撕裂应变有效系数分别取0.723、0.774和0.774。本文旨在为FRP约束拓展运用提供参考。
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相泽辉
王俊
牛建刚
周杰
关键词:  纤维增强复合材料  峰值应力模型  峰值应变模型  撕裂应变  本构模型    
Abstract: 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.
Key words:  fiber reinforced polymer    peak stress model    peak strain model    rupture stain    constitutive iteration
出版日期:  2023-01-10      发布日期:  2023-01-31
ZTFLH:  TM912  
基金资助: 国家自然科学基金(51968058);内蒙古自然区人才开发基金;内蒙古自治区青年科技英才支持计划( NJYT-18-A06);内蒙古自治区自然科学基金(2021MS05012);内蒙古科技大学建筑科学研究所开放基金项目(JYSJJ-2021M16)
通讯作者:  * 牛建刚,博士,教授,硕士研究生导师,主要研究方向为纤维轻骨料混凝土、混凝土结构耐久性及建筑结构可持续发展,已主持3项国家自然科学基金。近些年共发表论文40余篇,其中被EI及SCI收录17篇。niujiangang@imust.edu.cn   
作者简介:  相泽辉,于2016年6月在西安建筑科技大学土木工程学院获得结构工程硕士学位。于2019年4月至今在内蒙古科技大学土木工程学院从事科研工作,近些年共发表论文10余篇,其中被EI收录3篇,被SCI收录6篇,主要研究方向为混凝土结构耐久性、FRP约束混凝土。
引用本文:    
相泽辉, 王俊, 牛建刚, 周杰. FRP约束混凝土关键问题综述[J]. 材料导报, 2023, 37(1): 20110045-8.
XIANG Zehui, WANG Jun, NIU Jiangang, ZHOU Jie. Review of Key Issues in FRP-confined Concrete. Materials Reports, 2023, 37(1): 20110045-8.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.20110045  或          http://www.mater-rep.com/CN/Y2023/V37/I1/20110045
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