Experimental Study on Creep Failure of Non-Steam-Cured Ultrahigh-Performance Concrete under High Uniaxial Compressive Stress
Publication: Journal of Materials in Civil Engineering
Volume 34, Issue 6
Abstract
Ultrahigh-performance concrete (UHPC) creep failure was experimentally investigated under high uniaxial compressive stress. The influence of applied stress levels, loading times, and loading rates was considered. The failure mode, ultimate strain, creep coefficient, Poisson’s ratio, and nonlinear creep of UHPC were analyzed. The creep specimens failed suddenly in the tertiary creep stage. The ultimate strain of each creep failure specimen was less than the corresponding peak strain . The circumferential creep coefficient was considerably larger than the axial creep coefficient. In the loading phase, no significant increase in Poisson’s ratio was observed for specimens loaded at normal or rapid rates. In the creep phase, Poisson’s ratios increased considerably. The microcracks propagation within the specimens affected the nonlinear creep and creep failure behavior in UHPC specimens under high sustained compressive stress. An amplification factor model for the nonlinear creep strain was proposed, and was validated by comparing measured and calculated results.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This study was supported by the Natural Science Foundation of China under Grant No. 51778535, by the Sichuan Science and Technology Program under Grant No. 2021JDTD0012, and by the Science and Technology Research and Development Project of China Communications Construction Co., Ltd. (2020-ZJKJ-PTJS13).
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Published In
Journal of Materials in Civil Engineering
Volume 34 • Issue 6 • June 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Mar 26, 2021
Accepted: Oct 21, 2021
Published online: Mar 23, 2022
Published in print: Jun 1, 2022
Discussion open until: Aug 23, 2022
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