地聚物混凝土-玻璃纤维增强复合材料筋界面黏结行为的梁式试验研究

毕超豪; 赖华铭; 张耿斌; 颜天佑; 何瑞; 肖淑华; 刘润安; 卓柯先; 蔡培德; 郭永昌

doi:10.3724/j.gyjzG23051401

地聚物混凝土-玻璃纤维增强复合材料筋界面黏结行为的梁式试验研究

doi: 10.3724/j.gyjzG23051401

1. 广东电网有限责任公司广州供电局, 广州 510000;
2. 广东工业大学土木与交通工程学院, 广州 510000

基金项目:

国家自然科学基金项目(12272099)。

详细信息

作者简介:
毕超豪,硕士,工程师,主要从事高性能混凝土和结构工程方面的研究。

通讯作者:
郭永昌,主要从事高性能混凝土和FRP筋性能设计研究,guoyc@gdut.edu.cn。

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- 文章访问数: 224
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- 被引次数: 0
出版历程
- 收稿日期: 2023-05-14
- 网络出版日期: 2024-06-24

Research on Interfacial Bonding Performance Between Geopolymer Concrete and GFRP Bars Based on Beam Test

1. Guangzhou Power Supply Bureau of Guangdong Power Grid Co., Ltd., Guangzhou 510000, China;
2. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510000, China

摘要

摘要: 在"双碳"目标下,采用绿色低碳的地聚物混凝土替代高碳排放的硅酸盐水泥混凝土是目前的研究热点之一。以粉煤灰基地聚物混凝土为对象,基于梁式试验开展弯拉作用下地聚物混凝土-玻璃纤维增强复合材料(GFRP)筋界面黏结性能的研究,探明了不同混凝土强度、类型对地聚物混凝土-GFRP筋界面黏结性能的影响。结果表明:在与GFRP筋黏结的试验中,由于地聚物混凝土与硅酸盐水泥混凝土存在力学性能的差异,导致两者虽然有相似的破坏模式,但在不同混凝土强度下界面的破坏机制不同,黏结刚度、黏结强度随混凝土变化的规律也不同;对已有的XUE模型和Bimodal模型进行形状系数的修正,通过对比分析,建立适用于地聚物混凝土-GFRP筋的黏结滑移本构模型。
- 地聚物混凝土 /
- GFRP筋 /
- 梁式试验 /
- 黏结滑移 /
- 绿色低碳
Abstract: In the context of the "dual-carbon goals" strategy, the use of green and low-carbon geopolymer concrete instead of high-carbon emission Portland cement concrete is currently a hot research topic. This paper focused on fly ash-based geopolymer concrete and conducted a beam test to study the interfacial bonding performance between geopolymer concrete and glass fiber reinforced polymer (GFRP) bas under bending and tensile loads. The influence of different concrete strengths or types on the interfacial bonding performance between geopolymer concrete and GFRP bars was determined. The results showed that due to the difference in mechanical properties between geopolymer concrete and Portland cement concrete, although they showed similar failure modes in the tests with GFRP bars, the failure mechanism at the interface varied with different concrete strengths, and the bonding stiffness and strength also changed accordingly. Finally, the XUE model and Bimodal model were modified for shape factor, and a bond-slip constitutive model suitable for the interface between geopolymer concrete and GFRP bars was established through comparative analysis.
- geopolymer concrete /
- GFRP bars /
- beam test /
- bond-slip /
- green and low-carbon

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