Bond-Slip Model of Corrosion-Resistant Rebar and Fiber-Reinforced Seawater Sea-Sand Concrete

IF 0.8 4区材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Journal of Testing and Evaluation Pub Date : 2023-10-20 DOI:10.1520/jte20230256

Hao Zheng, Wei Wang, Chengqiang Gao, Jian Yuan, Jiang Feng

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引用次数: 0

Abstract

To study the bond performance between fiber-reinforced seawater sea-sand concrete and corrosion-resistant rebars (glass fiber–reinforced polymer [GFRP] bars and epoxy resin–coated rebars) in extremely hot and humid marine environments, bond anchorage tests between reinforcement and seawater sea-sand concrete are conducted to study bond performance. The failure morphology of reinforced concrete was investigated, and the bond-slip curves of different types of rebar and concrete were compared. According to the research results, the addition of basalt and polypropylene fibers to seawater sea-sand concrete changed the distribution of bonding stress, which was conducive to an improvement in the anchorage efficiency of reinforcement and concrete. The chemical bonding performance between the fiber-reinforced seawater sea-sand concrete and rebar is improved, wherein the bond stress increases by 94.01 % at the beginning of the slip, and the residual bond stress increases by 91.72 %. Compared with ordinary seawater sea-sand concrete, the bonding strength between ordinary reinforced rebar and fiber-reinforced seawater sea-sand concrete increased by 20.75 %, and the bonding strength between the GFRP bar and fiber-reinforced concrete decreased by 15.37 %. Based on the friction mechanism of rebars and concrete, bonding strength models of ordinary rebar, epoxy resin–coated rebar, and GFRP bars with fiber-reinforced seawater sea-sand concrete are presented.

查看原文本刊更多论文

耐腐蚀钢筋与纤维增强海水海砂混凝土粘结滑移模型

为研究纤维增强海水海砂混凝土与耐腐蚀钢筋(玻璃纤维增强聚合物[GFRP]钢筋和环氧树脂涂覆钢筋)在极湿热海洋环境中的粘结性能，进行了钢筋与海水海砂混凝土的粘结锚固试验，研究其粘结性能。研究了钢筋混凝土的破坏形态，比较了不同类型钢筋与混凝土的粘结滑移曲线。研究结果表明，在海水海砂混凝土中加入玄武岩和聚丙烯纤维，改变了粘结应力的分布，有利于提高钢筋和混凝土的锚固效率。纤维增强海水海砂混凝土与钢筋的化学键合性能得到改善，其中粘结应力在滑移开始时增加了94.01%，残余粘结应力增加了91.72%。与普通海水海砂混凝土相比，普通钢筋与纤维增强海水海砂混凝土的粘结强度提高了20.75%，GFRP筋与纤维增强混凝土的粘结强度降低了15.37%。基于钢筋与混凝土的摩擦机理，建立了普通钢筋、环氧树脂涂覆钢筋和玻璃钢钢筋与纤维增强海水海砂混凝土的粘结强度模型。

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来源期刊

Journal of Testing and Evaluation 工程技术-材料科学：表征与测试

CiteScore

2.30

自引率

8.30%

发文量

221

审稿时长

6.7 months

期刊介绍： This journal is published in six issues per year. Some issues, in whole or in part, may be Special Issues focused on a topic of interest to our readers. This flagship ASTM journal is a multi-disciplinary forum for the applied sciences and engineering. Published bimonthly, the Journal of Testing and Evaluation presents new technical information, derived from field and laboratory testing, on the performance, quantitative characterization, and evaluation of materials. Papers present new methods and data along with critical evaluations; report users'' experience with test methods and results of interlaboratory testing and analysis; and stimulate new ideas in the fields of testing and evaluation. Major topic areas are fatigue and fracture, mechanical testing, and fire testing. Also publishes review articles, technical notes, research briefs and commentary.