Effects of Strain Rate and Size on Concrete under Shear Using Push-Off Tests
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 7
Abstract
The direct shear behavior of concrete sections is evaluated using push-off specimens. The experimental program consists of three strain rates, , and , that are used to understand how changes in strain rates affect concrete sections at brittle failures. The strain rates used in the tests represent the rates of the shear strain demands on structures due to mild-to-severe earthquakes. The rate effect on a broader range is extrapolated by finite element models. A robust and realistically prescribed material damage constitutive law, Microplane Model M7, is used to perform the computational analysis. A size effect analysis is also conducted to reveal the size dependence of the monolithic concrete joints under shear. It is shown that the rate effect on shear strength of concrete joints is not negligible at and above the strain rate levels examined in this study, and the size dependence of concrete sections under direct shear complies with the Size Effect Law, Type I.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request (Vumat codes, FE input files, figures source files, raw test data).
Acknowledgments
The tests in this study were funded by Grant No. MGA-2017-40862 from the Scientific Research Office of ITU.
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Journal of Materials in Civil Engineering
Volume 35 • Issue 7 • July 2023
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© 2023 American Society of Civil Engineers.
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Received: Jul 7, 2022
Accepted: Nov 3, 2022
Published online: Apr 21, 2023
Published in print: Jul 1, 2023
Discussion open until: Sep 21, 2023
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