Implementation of multi-walled carbon nanotube incorporated GFRP as an alternative for CFRP in strengthening of concrete cylinders

IF 3.9 2区工程技术 Q1 ENGINEERING, CIVIL

Structures Pub Date : 2024-10-28 DOI:10.1016/j.istruc.2024.107606

Sruthi Sreekumar Kavitha , Lakshmi Joseph , P.Sarath Kumar , Prabir K. Sarker , Mini K. Madhavan , Karingamanna Jayanarayanan

{"title":"Implementation of multi-walled carbon nanotube incorporated GFRP as an alternative for CFRP in strengthening of concrete cylinders","authors":"Sruthi Sreekumar Kavitha , Lakshmi Joseph , P.Sarath Kumar , Prabir K. Sarker , Mini K. Madhavan , Karingamanna Jayanarayanan","doi":"10.1016/j.istruc.2024.107606","DOIUrl":null,"url":null,"abstract":"<div><div>Carbon fibre is the most widely utilized fibre for strengthening and retrofitting applications in the construction sector. The high cost of carbon fibre necessitates the identification of an alternative system for the retrofitting and repairing of concrete structures. In the current study, the characteristics of Glass Fibre Reinforced Polymer (GFRP), Carbon Fibre Reinforced Polymer (CFRP), and Multi-Walled Carbon Nanotube (MWCNT) incorporated GRFP are assessed with epoxy as a matrix for concrete cylinder confinement. The evaluation of one and two-layer CFRP confinement on concrete cylinders is carried out and outcomes are compared with the three-layer MWCNT incorporated GFRP confinement. A significant increase was observed in the axial compressive load-bearing capability of specimens with 1 wt percentage (wt%) MWCNT incorporated GFRP confined concrete cylinders. The axial load-carrying capability of concrete specimens with one layer of CFRP confinement was equivalent to that of specimens with 1 wt% MWCNT incorporated three-layer GFRP confinement. The axial strain of MWCNT incorporated three-layer GFRP confined specimens was 75 % more than one-layer and 12 % higher than two-layer CFRP confined specimens. According to observations, MWCNT-incorporated FRP confinement improves the energy absorption and ductility index. Ultrasonic pulse velocity test results confirmed the potency of three-layer GFRP confinement as a replacement for one and two layers of CFRP. A cost analysis is also carried out to validate the economic viability of the MWCNT-based GFRP compared to CFRP confinement.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"70 ","pages":"Article 107606"},"PeriodicalIF":3.9000,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Structures","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352012424017594","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}

引用次数: 0

Abstract

Carbon fibre is the most widely utilized fibre for strengthening and retrofitting applications in the construction sector. The high cost of carbon fibre necessitates the identification of an alternative system for the retrofitting and repairing of concrete structures. In the current study, the characteristics of Glass Fibre Reinforced Polymer (GFRP), Carbon Fibre Reinforced Polymer (CFRP), and Multi-Walled Carbon Nanotube (MWCNT) incorporated GRFP are assessed with epoxy as a matrix for concrete cylinder confinement. The evaluation of one and two-layer CFRP confinement on concrete cylinders is carried out and outcomes are compared with the three-layer MWCNT incorporated GFRP confinement. A significant increase was observed in the axial compressive load-bearing capability of specimens with 1 wt percentage (wt%) MWCNT incorporated GFRP confined concrete cylinders. The axial load-carrying capability of concrete specimens with one layer of CFRP confinement was equivalent to that of specimens with 1 wt% MWCNT incorporated three-layer GFRP confinement. The axial strain of MWCNT incorporated three-layer GFRP confined specimens was 75 % more than one-layer and 12 % higher than two-layer CFRP confined specimens. According to observations, MWCNT-incorporated FRP confinement improves the energy absorption and ductility index. Ultrasonic pulse velocity test results confirmed the potency of three-layer GFRP confinement as a replacement for one and two layers of CFRP. A cost analysis is also carried out to validate the economic viability of the MWCNT-based GFRP compared to CFRP confinement.

查看原文本刊更多论文

在混凝土圆柱体加固中使用多壁碳纳米管 GFRP 替代 CFRP

碳纤维是建筑领域用于加固和改造应用最广泛的纤维。由于碳纤维成本高昂，因此有必要寻找一种替代系统来改造和修复混凝土结构。在当前的研究中，对玻璃纤维增强聚合物（GFRP）、碳纤维增强聚合物（CFRP）和多壁碳纳米管（MWCNT）的特性进行了评估。对混凝土圆柱体上的一层和两层 CFRP 约束进行了评估，并将评估结果与三层 MWCNT 复合 GFRP 约束进行了比较。据观察，采用 1 重量百分比（wt%）MWCNT 掺杂 GFRP 限制混凝土圆柱体试样的轴向抗压承载能力明显提高。一层 CFRP 约束的混凝土试样的轴向承载能力与含有 1 wt% MWCNT 的三层 GFRP 约束的试样相当。掺入了 MWCNT 的三层 GFRP 约束试样的轴向应变比一层高 75%，比两层 CFRP 约束试样高 12%。根据观察，MWCNT-incorporated FRP 约束提高了能量吸收和延性指数。超声波脉冲速度测试结果证实了三层玻璃纤维增强塑料密封可替代一层和两层 CFRP。此外，还进行了成本分析，以验证与 CFRP 约束相比，基于 MWCNT 的 GFRP 的经济可行性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Structures Engineering-Architecture

CiteScore

5.70

自引率

17.10%

发文量

1187

期刊介绍： Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.