STEPWISE LOADING-UNLOADING CREEP TESTING OF FLY ASH CONCRETE AND ITS CONSTITUTIVE MODEL

被引：5

作者：

Li, Bing ^{[1
]}

Zhang, Lian-Ying ^{[1
]}

Li, Yan ^{[1
]}

Yin, Hui-Guang ^{[1
]}

Liu, Rui-Xue ^{[1
]}

机构：

[1] Xuzhou Inst Technol, Sch Civil Engn, Xuzhou, Jiangsu, Peoples R China

来源：

THERMAL SCIENCE | 2019年 / 23卷 / 03期

关键词：

creep; theMSSB-NVPB model; constitutive equation; concrete with fly ash;

D O I：

10.2298/TSCI180820221L

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Stepwise loading-unloading creep testing of concrete with fly ash content of 35%, and 50% was conducted. The time course curve of stepwise creep in fly ash concrete was obtained. Analyses have revealed that it had decelerated creep, constant velocity, and accelerated creep properties. Based on rheological theory, a non-linear viscoelastic-plastic rheological model (MSSB-NVPB) was constructed, and its constitutive relations and creep equations were obtained. Combined with experimental data, the model parameters were determined. The results showed that this model can characterize the creep properties of the fly ash concrete fairly well.

引用

页码：1539 / 1545

页数：7

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