BFRP纺织增强ECC加固cfst的抗压性能

IF 4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research Pub Date : 2025-04-04 DOI:10.1016/j.jcsr.2025.109545

Hui Zhao , Lintao Wang , Linghua Shen , Yunhe Wang , Rui Wang , Yajun Zhang

{"title":"BFRP纺织增强ECC加固cfst的抗压性能","authors":"Hui Zhao , Lintao Wang , Linghua Shen , Yunhe Wang , Rui Wang , Yajun Zhang","doi":"10.1016/j.jcsr.2025.109545","DOIUrl":null,"url":null,"abstract":"<div><div>This paper presents test and numerical studies on the behaviours of basalt fibre textile and engineered cementitious composite (ECC) reinforced concrete-filled steel tube (CFST) columns under axial compression. A total of 17 specimens were subjected to axial compression, with variables including the number of basalt fibre layers, mesh size, steel tube thickness and concrete strength grade. The behaviours were analyzed through the failure patterns, load-vertical strain responses, and the confinement mechanism. Results indicated that textile-reinforced ECC (TR-ECC) enhanced the axial performance of CFST columns, with ultimate strength improvement ranging from 9 % to 22 %. Additionally, the ultimate strength improved with the increase in the steel tube thickness, the number of textile layers, and the concrete strength. A series of finite element (FE) models were then established and validated by comparing the load versus displacement curves with test data. Parametric studies were conducted to investigate the influence of the number of textile layer, textile grid size, material strength and steel ratio on the axial capacity. Results showed that an increase in mesh size leads to a decrease in the axial resistance of the strengthened columns. Finally, a simplified formula for calculating the axial capacity of the CFSTs reinforced with TR-ECC was developed.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"230 ","pages":"Article 109545"},"PeriodicalIF":4.0000,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Compressive performance of CFSTs strengthened with BFRP textile-reinforced ECC\",\"authors\":\"Hui Zhao , Lintao Wang , Linghua Shen , Yunhe Wang , Rui Wang , Yajun Zhang\",\"doi\":\"10.1016/j.jcsr.2025.109545\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This paper presents test and numerical studies on the behaviours of basalt fibre textile and engineered cementitious composite (ECC) reinforced concrete-filled steel tube (CFST) columns under axial compression. A total of 17 specimens were subjected to axial compression, with variables including the number of basalt fibre layers, mesh size, steel tube thickness and concrete strength grade. The behaviours were analyzed through the failure patterns, load-vertical strain responses, and the confinement mechanism. Results indicated that textile-reinforced ECC (TR-ECC) enhanced the axial performance of CFST columns, with ultimate strength improvement ranging from 9 % to 22 %. Additionally, the ultimate strength improved with the increase in the steel tube thickness, the number of textile layers, and the concrete strength. A series of finite element (FE) models were then established and validated by comparing the load versus displacement curves with test data. Parametric studies were conducted to investigate the influence of the number of textile layer, textile grid size, material strength and steel ratio on the axial capacity. Results showed that an increase in mesh size leads to a decrease in the axial resistance of the strengthened columns. Finally, a simplified formula for calculating the axial capacity of the CFSTs reinforced with TR-ECC was developed.</div></div>\",\"PeriodicalId\":15557,\"journal\":{\"name\":\"Journal of Constructional Steel Research\",\"volume\":\"230 \",\"pages\":\"Article 109545\"},\"PeriodicalIF\":4.0000,\"publicationDate\":\"2025-04-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Constructional Steel Research\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0143974X25002238\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Constructional Steel Research","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0143974X25002238","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

摘要

本文对玄武岩纤维织物和工程胶凝复合材料（ECC）增强钢管混凝土（CFST）柱在轴压作用下的性能进行了试验和数值研究。共17个试件进行轴压试验，试验变量包括玄武岩纤维层数、网孔尺寸、钢管厚度和混凝土强度等级。通过破坏模式、荷载-竖向应变响应和约束机制对其性能进行了分析。结果表明：织物增强ECC （TR-ECC）增强了CFST柱的轴向性能，其极限强度提高幅度在9% ~ 22%之间；随着钢管厚度、纺织层数和混凝土强度的增加，极限强度也有所提高。建立了一系列有限元模型，并将载荷-位移曲线与试验数据进行了对比验证。通过参数化研究，考察了织物层数、织物网格尺寸、材料强度和钢比对轴向承载力的影响。结果表明：网格尺寸的增大导致加固柱轴向阻力的减小；最后，推导了经TR-ECC加固的钢管混凝土混凝土轴向承载力的简化计算公式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Compressive performance of CFSTs strengthened with BFRP textile-reinforced ECC

This paper presents test and numerical studies on the behaviours of basalt fibre textile and engineered cementitious composite (ECC) reinforced concrete-filled steel tube (CFST) columns under axial compression. A total of 17 specimens were subjected to axial compression, with variables including the number of basalt fibre layers, mesh size, steel tube thickness and concrete strength grade. The behaviours were analyzed through the failure patterns, load-vertical strain responses, and the confinement mechanism. Results indicated that textile-reinforced ECC (TR-ECC) enhanced the axial performance of CFST columns, with ultimate strength improvement ranging from 9 % to 22 %. Additionally, the ultimate strength improved with the increase in the steel tube thickness, the number of textile layers, and the concrete strength. A series of finite element (FE) models were then established and validated by comparing the load versus displacement curves with test data. Parametric studies were conducted to investigate the influence of the number of textile layer, textile grid size, material strength and steel ratio on the axial capacity. Results showed that an increase in mesh size leads to a decrease in the axial resistance of the strengthened columns. Finally, a simplified formula for calculating the axial capacity of the CFSTs reinforced with TR-ECC was developed.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Journal of Constructional Steel Research 工程技术-工程：土木

CiteScore

7.90

自引率

19.50%

发文量

550

审稿时长

46 days

期刊介绍： The Journal of Constructional Steel Research provides an international forum for the presentation and discussion of the latest developments in structural steel research and their applications. It is aimed not only at researchers but also at those likely to be most affected by research results, i.e. designers and fabricators. Original papers of a high standard dealing with all aspects of steel research including theoretical and experimental research on elements, assemblages, connection and material properties are considered for publication.