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Early-age Mechanical Properties and Constitutive Model of Polystyrene Concrete Under Impact Load by Zhihang Wang; Erlei Bai; Tong Zhang; Yan Lv is a Engineering article available to read on EtoBox.

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The dynamic mechanical tests of polystyrene concrete with ages of 12 h, 24 h and 36 h and 28 d were carried out by Φ 100 mm SHPB equipment. The effects of strain rate and age on dynamic mechanical properties of polystyrene concrete were analyzed in terms of the relationship between strain rate and impact velocity, strength characteristics, deformation characteristics and energy absorption characteristics. And based on Saenz model, the early-age dynamic constitutive model of polystyrene concrete was constructed. The results show that the strain rate of polystyrene concrete is positively correlated with the impact velocity. At the same impact velocity, the strain rate of polystyrene concrete decreases with age. The strength characteristic indicators, deformation characteristic indicators and energy absorption characteristic indicator of polystyrene concrete all have strain rate strengthening effect, and all these indicators and the strain rate sensitivity of these indicators increase with age. Polystyrene concrete has good deformation and energy absorption characteristics at early age. At the age of 36 h, the peak strain, ultimate strain and specific energy absorption of polystyrene

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Author

Zhihang Wang; Erlei Bai; Tong Zhang; Yan Lv

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)