Fangwen Wu , Yateng Ma , Song Lei , Shuo Liu , Lanqing He , Jiachen Liao , Fei Yang
{"title":"CFRP网格增强ECC与NC界面粘结性能的试验研究","authors":"Fangwen Wu , Yateng Ma , Song Lei , Shuo Liu , Lanqing He , Jiachen Liao , Fei Yang","doi":"10.1016/j.conbuildmat.2023.131947","DOIUrl":null,"url":null,"abstract":"<div><p>Carbon-fiber-reinforced polymer (CFRP) grid-reinforced engineering cementitious composites (CFRPG-ECC) have been widely used in structural strengthening engineering owing to their excellent capacity for controlling cracking width. Excellent interfacial bond behavior is essential for ensuring cooperative work between CFRPG-ECC and concrete. However, research on the interfacial bond behavior between CFRPG-ECC and concrete is limited. In this study, the improved hinged beam tests were conducted on ten groups to investigate the bonding behavior at the interface between CFRPG-ECC and concrete. Concrete/ECC strength, interfacial bonding dimensions (bonding length and width), and interfacial bonding methods were investigated. Digital image correlation was used to observe the entire process of specimen failure, the results indicating that the specimen with the CFRP grid could effectively delay the cracking of the ECC layer, improve the bearing capacity and realize interface debonding failure. Moreover, the bonding performance of the CFRPG-ECC and concrete interface was analyzed in terms of bearing capacity, strain and shear stress distribution and bond-slip curve. Finally, an analytical model for estimating the interfacial bearing capacity was established, with its predictions consistent with experimental results.</p></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"392 ","pages":"Article 131947"},"PeriodicalIF":8.0000,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Experimental study on the bond behavior of CFRP-grid-reinforced ECC and NC interface\",\"authors\":\"Fangwen Wu , Yateng Ma , Song Lei , Shuo Liu , Lanqing He , Jiachen Liao , Fei Yang\",\"doi\":\"10.1016/j.conbuildmat.2023.131947\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Carbon-fiber-reinforced polymer (CFRP) grid-reinforced engineering cementitious composites (CFRPG-ECC) have been widely used in structural strengthening engineering owing to their excellent capacity for controlling cracking width. Excellent interfacial bond behavior is essential for ensuring cooperative work between CFRPG-ECC and concrete. However, research on the interfacial bond behavior between CFRPG-ECC and concrete is limited. In this study, the improved hinged beam tests were conducted on ten groups to investigate the bonding behavior at the interface between CFRPG-ECC and concrete. Concrete/ECC strength, interfacial bonding dimensions (bonding length and width), and interfacial bonding methods were investigated. Digital image correlation was used to observe the entire process of specimen failure, the results indicating that the specimen with the CFRP grid could effectively delay the cracking of the ECC layer, improve the bearing capacity and realize interface debonding failure. Moreover, the bonding performance of the CFRPG-ECC and concrete interface was analyzed in terms of bearing capacity, strain and shear stress distribution and bond-slip curve. Finally, an analytical model for estimating the interfacial bearing capacity was established, with its predictions consistent with experimental results.</p></div>\",\"PeriodicalId\":288,\"journal\":{\"name\":\"Construction and Building Materials\",\"volume\":\"392 \",\"pages\":\"Article 131947\"},\"PeriodicalIF\":8.0000,\"publicationDate\":\"2023-08-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Construction and Building Materials\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0950061823016616\",\"RegionNum\":1,\"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":"Construction and Building Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0950061823016616","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
Experimental study on the bond behavior of CFRP-grid-reinforced ECC and NC interface
Carbon-fiber-reinforced polymer (CFRP) grid-reinforced engineering cementitious composites (CFRPG-ECC) have been widely used in structural strengthening engineering owing to their excellent capacity for controlling cracking width. Excellent interfacial bond behavior is essential for ensuring cooperative work between CFRPG-ECC and concrete. However, research on the interfacial bond behavior between CFRPG-ECC and concrete is limited. In this study, the improved hinged beam tests were conducted on ten groups to investigate the bonding behavior at the interface between CFRPG-ECC and concrete. Concrete/ECC strength, interfacial bonding dimensions (bonding length and width), and interfacial bonding methods were investigated. Digital image correlation was used to observe the entire process of specimen failure, the results indicating that the specimen with the CFRP grid could effectively delay the cracking of the ECC layer, improve the bearing capacity and realize interface debonding failure. Moreover, the bonding performance of the CFRPG-ECC and concrete interface was analyzed in terms of bearing capacity, strain and shear stress distribution and bond-slip curve. Finally, an analytical model for estimating the interfacial bearing capacity was established, with its predictions consistent with experimental results.
期刊介绍：
Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged.
Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.
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