Structural Engineering and Mechanics

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Effect of high temperatures on local bond-slip behavior between rebars and UHPC

  • Tang, Chao-Wei (Department of Civil Engineering & Geomatics, Cheng Shiu University)
  • Received : 2021.01.12
  • Accepted : 2021.10.22
  • Published : 2022.01.25
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Abstract

This paper aimed to study the local bond-slip behavior between ultra-high-performance concrete (UHPC) and a reinforcing bar after exposure to high temperatures. A series of pull-out tests were carried out on cubic specimens of size 150×150×150 mm with deformed steel bar embedded for a fixed length of three times the diameter of the tested deformed bar. The experimental results of the bond stress-slip relationship were compared with the Euro-International Concrete Committee (CEB-Comite Euro-International du Beton)-International Federation for Prestressing (FIP-Federation Internationale de la Precontrainte) Model Code and with prediction models found in the literature. In addition, based on the test results, an empirical model of the bond stress-slip relationship was proposed. The evaluation and comparison results showed that the modified CEB-FIP Model code 2010 proposed by Aslani and Samali for the local bond stress-slip relationship for UHPC after exposure to high temperatures was more conservative. In contrast, for both room temperature and after exposure to high temperatures, the modified CEB-FIP Model Code 2010 local bond stress-slip model for UHPC proposed in this study was able to predict the test results with reasonable accuracy.

Keywords

Acknowledgement

The research was funded by the Ministry of Science and Technology of Taiwan grant number MOST 108-2221-E-230-003-MY2. The author sincerely thanks the Ministry of Science and Technology of Taiwan for funding this research work.

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