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Creep Model of High-Strength High-Performance Concrete Under Cyclic Loading

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Abstract

Concrete creep under both static and cyclic loading conditions was investigated. Four groups of high-strength high-performance concrete (HSHPC) prism specimens were fabricated, and three of these specimens were loaded periodically by the MTS Landmark Fatigue Testing Machine System. Creep characteristics and creep coefficients of HSHPC under static loading and cyclic loading, respectively, were obtained and compared. The experimental results show that the creep strains under cyclic loading with a mean stress of 0.4 fcp and an amplitude of 0.2 fcp increase significantly compared with the creep strains under static loading, and the maximum value was 1.2–2.3 times at early stages. In addition, the creep coefficient increases nonlinearly with the number of cyclic loading repetitions. The influence coefficient for cyclic loading γcyc=1.088×(N/N0)0.078 was introduced based on the previous HSHPC creep model, and then the modified creep model under cyclic loading was established. Finally, the residual method, the CEB coefficient of variation method and the B3 coefficient of variation method were applied to evaluate the modified creep model. The statistical results demonstrate that the modified creep model agrees well with the experimental measurements. Hence, it has important theoretical and practical values for accurately predicting the deflection of concrete bridges under cyclic traffic loading.

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Authors and Affiliations

  1. Hubei Key Laboratory of Roadway Bridge & Structure Engineering, Wuhan University of Technology, Wuhan, 430070, China

    Qian Li  (李倩), Muyu Liu, Zhifang Lu & Xiaoguang Deng  (邓晓光)

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  1. Qian Li  (李倩)
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  2. Muyu Liu
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  3. Zhifang Lu
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  4. Xiaoguang Deng  (邓晓光)
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Correspondence to Xiaoguang Deng  (邓晓光).

Additional information

Supported by Key Project of Chinese National Programs for Fundamental Research and Development (No. 2017YFB 0310105-03), Key Foundation Projects of Hubei Province (No. 2016CFA074) and Technology Innovation Major Project of Hubei Province (No. 2018AAA001-04)

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Li, Q., Liu, M., Lu, Z. et al. Creep Model of High-Strength High-Performance Concrete Under Cyclic Loading. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 34, 622–629 (2019). https://doi.org/10.1007/s11595-019-2096-9

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  • DOI: https://doi.org/10.1007/s11595-019-2096-9

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