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Static and Cyclic Tension Behavior of Post-Installed Rebar after Exposure to High Temperature

  • Structural Engineering
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Abstract

In order to investigate the static and cyclic tension behavior of post-installed rebar along with cement-based adhesive that is adopted after exposure to high temperature, a three-phase experimental program has been carried out and two typical embedment depths, 10d and 15d are designed. The surfaces of specimens are firstly heated up to 800°C, and then the residual strength at different temperatures of cement-based adhesive has been studied by consequent static pull-out tests. Experimental results show that the tensile strength has a significant reduction at elevated temperatures compared with that of room temperature. The cement-based adhesive has almost lost its full bond strength when the temperature exceeds 350°C. Finally, the bond performance of cement-based adhesive under cyclic loading has been further tested and analyzed. It is found that both 10d and 15d specimens have failed abruptly with rebar pull-out. The employment of long embedment depth has been verified to be an effective method to improve the bond performance of cement-based adhesive under static and cyclic loading. Static numerical investigation indicates that the bond stress distribution is not uniform along the embedment length of post-installed rebar at different temperatures of cement-based adhesive. The temperature-dependent tensile strength prediction has also been obtained based on the experimental data.

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Acknowledgements

This study was financially supported by the Key Research and Development Plan of Shandong Province (Grant number 2017GSF22106); and the Shandong Provincial Natural Science Foundation of China (Grant number ZR2014EL037).

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Authors and Affiliations

  1. School of Civil Engineering and Architecture, University of Jinan, Jinan, 250022, China

    Qun Xie & Song Xue

  2. Liuzhou Institute of Architecture and Design, Liuzhou, 545000, China

    Yongqiang Zhao

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  1. Qun Xie
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  2. Song Xue
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  3. Yongqiang Zhao
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Correspondence to Qun Xie.

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Xie, Q., Xue, S. & Zhao, Y. Static and Cyclic Tension Behavior of Post-Installed Rebar after Exposure to High Temperature. KSCE J Civ Eng 24, 1775–1786 (2020). https://doi.org/10.1007/s12205-020-0244-6

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  • DOI: https://doi.org/10.1007/s12205-020-0244-6

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