Experimental study on creep behavior of steel tubular columns filled with compound concrete made of demolished concrete lumps and fresh concrete

被引：0
|
作者：
Liu W. [1 ]
Liu Q. [1 ]
Ai W. [2 ,3 ]
Shen C. [2 ,3 ]
Sun Y. [1 ]
机构：
[1] Shenzhen General Institute of Architectural Design and Research Co., Ltd, Shenzhen
[2] State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou
[3] Zhuhai Huafa Urban Operations & Investment Holdings Co., Ltd, Zhuhai
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2019年 / 40卷 / 06期
关键词：
Age-adjusted effective modulus method; Compound concrete-filled steel tube; Creep test; Demolished concrete; Loading age;
D O I：
10.14006/j.jzjgxb.2018.C380
中图分类号：
学科分类号：
摘要：
In order to study the effects of loading age on the creep behavior of steel tubular columns filled with compound concrete made of demolished concrete lumps and fresh concrete, basic creep tests were performed on twelve groups of specimens. The creep coefficient-time curves and creep stain-time curves under different loading ages for each specimen were obtained and analyzed. The effectiveness of variation of creep coefficient and different calculation methods to predict the creep strain of specimens were studied. The results show that: for both concrete-filled steel tube specimens and steel tubular column specimens filled with compound concrete, the creep coefficient increases with the increasing loading age, and the effect of loading age on the latter is less than that on the former. For the same loading age, the creep coefficient of steel tubular columns filled with compound concrete is smaller than that of the concrete-filled steel tube, and the difference between the two decreases with the loading age. The age-adjusted effective modulus method based on the Counto model is presented to predict the creep stain of specimens, and the calculated values are in good agreement with the experimental results. © 2019, Editorial Office of Journal of Building Structures. All right reserved.
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页码：175 / 183
页数：8
相关论文
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