{"title":"通过直接拉伸试验对超高压纤维水泥混凝土湿接缝的粘结性能进行实验研究","authors":"Haichun Li, Chuanxi Li, Yumei Wen, Zijian Zhu, Jiahao Peng, Siyang Li, Zheng Feng","doi":"10.1617/s11527-024-02421-y","DOIUrl":null,"url":null,"abstract":"<div><p>Ultra-high-performance fiber-reinforced concrete (UHPFRC) is applied to joint nodes with its excellent mechanical properties, which helps to improve the force transfer performance of UHPFRC structures. The strength of the connections is dependent on the adhesion and friction between the connected materials in the bridge design procedure. This research aims to identify the adhesion performance between UHPFRC and UHPFRC under different interfacial roughening methods. To this end, the maximum tensile stress and the load–displacement curves of UHPFRC wet joints treated by high-pressure water jet roughening, uniform plastic formwork roughening, embedded wire mesh roughening, manual mechanical roughening, and epoxy resin were obtained via direct tension tests. The test results indicate that the bond strength of UHPFRC wet joints can reach 22.36%-68.06% of the tensile strength after different interfacial treatments, among which the roughening methods using high-pressure water jet significantly improve the bond performance of UHPFRC wet joints, followed by the roughing method of uniform plastic formwork and embedded steel wire mesh. Physical roughening treatment has less effect on the stiffness of UHPFRC wet joints and exhibits a typical brittle failure mode. A tensile constitutive model in the elastic phase of the UHPFRC wet joint interface and the simplified interfacial tensile stress-relative displacement model were proposed. Finally, the performance of the interfacial adhesion parameters was appraised by finite element modeling. The finite element analysis showed a good agreement with the experimental results.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":null,"pages":null},"PeriodicalIF":3.4000,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Experimental investigation on bond performance of UHPFRC wet joint by direct tension test\",\"authors\":\"Haichun Li, Chuanxi Li, Yumei Wen, Zijian Zhu, Jiahao Peng, Siyang Li, Zheng Feng\",\"doi\":\"10.1617/s11527-024-02421-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Ultra-high-performance fiber-reinforced concrete (UHPFRC) is applied to joint nodes with its excellent mechanical properties, which helps to improve the force transfer performance of UHPFRC structures. The strength of the connections is dependent on the adhesion and friction between the connected materials in the bridge design procedure. This research aims to identify the adhesion performance between UHPFRC and UHPFRC under different interfacial roughening methods. To this end, the maximum tensile stress and the load–displacement curves of UHPFRC wet joints treated by high-pressure water jet roughening, uniform plastic formwork roughening, embedded wire mesh roughening, manual mechanical roughening, and epoxy resin were obtained via direct tension tests. The test results indicate that the bond strength of UHPFRC wet joints can reach 22.36%-68.06% of the tensile strength after different interfacial treatments, among which the roughening methods using high-pressure water jet significantly improve the bond performance of UHPFRC wet joints, followed by the roughing method of uniform plastic formwork and embedded steel wire mesh. Physical roughening treatment has less effect on the stiffness of UHPFRC wet joints and exhibits a typical brittle failure mode. A tensile constitutive model in the elastic phase of the UHPFRC wet joint interface and the simplified interfacial tensile stress-relative displacement model were proposed. Finally, the performance of the interfacial adhesion parameters was appraised by finite element modeling. The finite element analysis showed a good agreement with the experimental results.</p></div>\",\"PeriodicalId\":691,\"journal\":{\"name\":\"Materials and Structures\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.4000,\"publicationDate\":\"2024-07-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials and Structures\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1617/s11527-024-02421-y\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials and Structures","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1617/s11527-024-02421-y","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
Experimental investigation on bond performance of UHPFRC wet joint by direct tension test
Ultra-high-performance fiber-reinforced concrete (UHPFRC) is applied to joint nodes with its excellent mechanical properties, which helps to improve the force transfer performance of UHPFRC structures. The strength of the connections is dependent on the adhesion and friction between the connected materials in the bridge design procedure. This research aims to identify the adhesion performance between UHPFRC and UHPFRC under different interfacial roughening methods. To this end, the maximum tensile stress and the load–displacement curves of UHPFRC wet joints treated by high-pressure water jet roughening, uniform plastic formwork roughening, embedded wire mesh roughening, manual mechanical roughening, and epoxy resin were obtained via direct tension tests. The test results indicate that the bond strength of UHPFRC wet joints can reach 22.36%-68.06% of the tensile strength after different interfacial treatments, among which the roughening methods using high-pressure water jet significantly improve the bond performance of UHPFRC wet joints, followed by the roughing method of uniform plastic formwork and embedded steel wire mesh. Physical roughening treatment has less effect on the stiffness of UHPFRC wet joints and exhibits a typical brittle failure mode. A tensile constitutive model in the elastic phase of the UHPFRC wet joint interface and the simplified interfacial tensile stress-relative displacement model were proposed. Finally, the performance of the interfacial adhesion parameters was appraised by finite element modeling. The finite element analysis showed a good agreement with the experimental results.
期刊介绍:
Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.