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Experimental Study on the Bonding Behavior between Ribbed Steel Bars and Ultra-High-Performance Concrete

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Název: Experimental Study on the Bonding Behavior between Ribbed Steel Bars and Ultra-High-Performance Concrete
Autoři: Xinzhi Duan
Zdroj: 预应力技术, Vol 3, Iss 03, Pp 49-61 (2025)
Informace o vydavateli: Editorial Department of Progress in Prestress Technology, Tongji University, 2025.
Rok vydání: 2025
Sbírka: LCC:Structural engineering (General)
Témata: ultra-high-performance concrete, steel fiber, ribbed steel bar, bond stress, bond-slip curve, Bridge engineering, TG1-470, Structural engineering (General), TA630-695
Popis: To evaluate the bonding behavior between ribbed steel bars and ultra-high-performance concrete (UHPC), several pull-out samples were experimentally investigated and presented. The influences of bar diameter and embedment length on the bond failure mode, ultimate bond stress, stress?slip curve and bond stress distribution were investigated. Compared with that of ordinary reinforced concrete, the ultimate bond stress between steel bars and UHPC was increased by 74% under the same conditions. In addition, the bond-slip curve showed a relatively large slope before the ultimate bond stress was reached, and at the same time, the curve showed better ductility after the ultimate bond stress was exceeded. When the sample experiences steel bar yielding or pull-out failure, the bond stress distribution curve exhibits typical multipeak features. As the bar embedment length increased, the bond stress distribution became increasingly heterogeneous, and the increase in the peak number in the bond stress distribution curve reflected this trend. Under appropriate concrete cover thickness, the critical embedment length was between 4d and 6d.
Druh dokumentu: article
Popis souboru: electronic resource
Jazyk: English
ISSN: 2521-9480
Relation: http://ptmc.tongji.edu.cn/yyljsen/article/pdf/202503004; https://doaj.org/toc/2521-9480
DOI: 10.59238/j.pt.2025.03.004
Přístupová URL adresa: https://doaj.org/article/08a7f88fc7fe4c99ae3faa35e0b961b6
Přístupové číslo: edsdoj.08a7f88fc7fe4c99ae3faa35e0b961b6
Databáze: Directory of Open Access Journals
Popis
Abstrakt:To evaluate the bonding behavior between ribbed steel bars and ultra-high-performance concrete (UHPC), several pull-out samples were experimentally investigated and presented. The influences of bar diameter and embedment length on the bond failure mode, ultimate bond stress, stress?slip curve and bond stress distribution were investigated. Compared with that of ordinary reinforced concrete, the ultimate bond stress between steel bars and UHPC was increased by 74% under the same conditions. In addition, the bond-slip curve showed a relatively large slope before the ultimate bond stress was reached, and at the same time, the curve showed better ductility after the ultimate bond stress was exceeded. When the sample experiences steel bar yielding or pull-out failure, the bond stress distribution curve exhibits typical multipeak features. As the bar embedment length increased, the bond stress distribution became increasingly heterogeneous, and the increase in the peak number in the bond stress distribution curve reflected this trend. Under appropriate concrete cover thickness, the critical embedment length was between 4d and 6d.
ISSN:25219480
DOI:10.59238/j.pt.2025.03.004