摘要
泡沫填充混凝土(FFC)有望成为工程材料拦阻系统(EMAS)的新型拦阻材料,针对其准静态压缩力学性能进行研究,制作了6种不同聚苯乙烯泡沫(EPS)掺量(以体积分数计)的FFC试件进行准静态压缩实验.通过对实验数据的分析,对材料的应力-应变曲线进行分段拟合,建立了拟合参数与EPS掺量的关系,进而建立了FFC材料的准静态压缩本构模型.结果表明:FFC材料准静态压缩应力-应变曲线可分为3个阶段,即弹性段、塑性平台段和密实段;FFC抗压强度随EPS掺量增大而降低;本构模型与实验结果吻合较好,能较为准确地描述不同EPS掺量FFC材料的压缩力学性能.
The foam-filled concrete （FFC） is expected to become a new type of arresting material for the engi- neered material arresting system （EMAS）. In order to investigate the mechanical properties of the FFC material un- der 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 experi- mental 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 qua- si-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 ac- curately describe the compressive mechanical properties of the FFC material of different EPS fractions.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第10期49-56,共8页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(11272124
11472109)~~
关键词
泡沫填充混凝土
准静态压缩
本构模型
EPS掺量
foam-filled concrete
quasi-static compression
constitutive model
EPS fraction
