Dynamic compressive properties and constitutive model of reactive powder concrete

被引：0

作者：

Xie L. ^{[1
]}

Li Q.-H. ^{[1
]}

Xu S.-L. ^{[1
]}

机构：

[1] School of Civil Engineering and Architecture, Zhejiang University, Hangzhou

来源：

Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2021年 / 55卷 / 05期

关键词：

Dynamic compressive property; Dynamic constitutive model; Reactive powder concrete (RPC); Split Hopkinson pressure bar system (SHPB); Strain rate effect;

D O I：

10.3785/j.issn.1008-973X.2021.05.021

中图分类号：

学科分类号：

摘要：

The granulated blast furnace slag was used to replace part of cement to prepare steam free reactive powder concrete (RPC), in order to overcome the disadvantage of traditional reactive powder concrete (RPC) that needs high temperature steam curing. The impact compression experiment of steam free RPC was carried out by using split Hopkinson pressure bar system (SHPB) with diameter of 80 mm, the influence of rate effect on the dynamic mechanical properties of steam free RPC was explored at the same time, and the dynamic constitutive model was established based on the experimental results. Results show that in the strain rate range of 10~290 s-1, the peak stress, the peak strain and the impact toughness of the steam free RPC show obvious rate sensitivity, while the elastic modulus remains unchanged under different strain rates. On the aspect of constitutive model, both the improved Z-W-T viscoelastic constitutive model and the Weibull distribution-based model can well describe the dynamic stress-strain curve of steam free RPC. Due to the relatively fewer parameters Weibull distribution-based model contains, the stress-strain curve under different strain rates can be predicted based on the known relationship between parameters and strain rate in the model. Copyright ©2021 Journal of Zhejiang University (Engineering Science). All rights reserved.

引用

页码：999 / 1009

页数：10

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