Bond-slip behavior and constitutive relation of reinforced and recycled concrete after freezing and thawing

被引：0
|
作者：
Wang C. [1 ]
Luo F. [1 ]
Cao F. [1 ]
Lu L. [2 ]
机构：
[1] School of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou
[2] Jianyan Huace(Hangzhou) Science & Technology Co., Ltd., Hangzhou
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2021年 / 42卷 / 06期
关键词：
Bond behavior; Bond-slip constitutive relation; Central pull-out test; Freeze-thaw cycle; Recycled concrete;
D O I：
10.14006/j.jzjgxb.2018.0592
中图分类号：
学科分类号：
摘要：
The bond-slip behavior of steel bar and recycled concrete under different freeze-thaw cycles was studied by central pull-out tests on 75 specimens of five groups. The thickness of cover, anchorage length of steel bar and concrete type were taken as variables. And the bond-slip constitutive relation considering the position function was established. At the same time, the bond behavior of recycled concrete was simulated by ANSYS finite element analysis software. The results show that the bond behavior of steel bar and recycled concrete after freeze-thaw cycles is slightly lower than that of ordinary concrete. Under the same freeze-thaw cycles, the greater the thickness of cover and the shorter the anchorage length of steel bar, the greater the bond strength and average bond stiffness, and the smaller the peak slip. Among them, the thickness of cover has the greatest influence on the bond behavior of recycled concrete. With the increase of freeze-thaw cycles, the bond stress is transferred to the free end quickly. After 100 freeze-thaw cycles, the peak bond stress at the free end exceeds that at the loading end. Through the experimental analysis, the law of bond stress and slip along the anchorage length of the specimen was obtained, and moreover the bond-slip constitutive relation between steel bar and recycled concrete considering the position function was established. © 2021, Editorial Office of Journal of Building Structures. All right reserved.
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页码：214 / 222
页数：8
相关论文
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