Abstract
In order to investigate the mechanical properties and stress-strain curves of concrete at different ages under impact load, the impact compression tests of concrete at age of 1, 3, 7, 14 and 28 d were conducted with a large diameter split Hopkinson pressure bar, respectively. Based on statistical damage theory and Weibull distribution, combining the analysis of the change laws of stress-strain curves and viscosity coefficient of concrete with age, a damage constitutive model that can reflect the variation in dynamic mechanical properties with age was proposed. The stress-strain curves calculated from the proposed model are in good agreement with those from experimental data directly.
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Foundation item: Project(2010CB732004) supported by National Basic Research Program of China; Project(50934006) supported by the National Natural Science Foundation of China
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Li, Xb., Wang, Sm., Weng, L. et al. Damage constitutive model of different age concretes under impact load. J. Cent. South Univ. 22, 693–700 (2015). https://doi.org/10.1007/s11771-015-2572-0
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DOI: https://doi.org/10.1007/s11771-015-2572-0