A constitutive model of foam-filled concrete under quasi-static compression

作者：Liu, Yi-Ping; Wu, Tu-Hua; Liu, Ze-Jia; Jiang, Zhen-Yu; Tang, Li-Qun

来源：Journal of South China University of Technology(Natural Science Edition), 2016, 44(10): 49-56.

DOI：10.3969/j.issn.1000-565X.2016.10.008

• Compressive mechanical properties
• Engineered materials
• EPS fraction
• Expanded polystyrene
• Foam filled
• Quasi-static compression
• Quasi-static compression experiment
• Uni-axial compression

The foam-filled concrete (FFC) is expected to become a new type of arresting material for the engineered material arresting system (EMAS). In order to investigate the mechanical properties of the FFC material under the quasi-static compression, six FFC specimens of different expanded polystyrene(EPS) fractions(volume fraction) were manufactured to carry out the quasi-static compression experiments. Then, by analyzing the experimental data, the stress-strain curves were fitted by using sectional curves, and the relationships between the fitting parameters and the EPS fraction were determined. Finally, a constitutive model of the FFC material under the quasi-static compression was constructed. The results show that (1) the stress-strain curve of the FFC material under the quasi-static uniaxial compression can be divided into three parts, namely, the elastic stage, the plastic platform stage and the densification stage;(2) the compressive strength of the FFC material decreases with the increase of the EPS fraction;and (3) the constructed constitutive model accords well with the experimental data, and can accurately describe the compressive mechanical properties of the FFC material of different EPS fractions.

• 出版日期2016-10-1
• 单位华南理工大学