Bond-Slip Model for Reinforced Concrete under Deicer-Frost Environment

被引：0
|
作者：
Wang Q. [1 ,2 ]
Wei Z. [2 ]
Xu G. [1 ,2 ]
Xiang J. [2 ]
Pan Q. [2 ]
机构：
[1] Hubei Key Laboratory of Disaster Prevention and Mitigation, China Three Gorges University, Yichang
[2] College of Civil Engineering & Architecture, China Three Gorges University, Yichang
来源：
Xu, Gang (postxg@163.com) | 1600年 / Tongji University卷 / 20期
关键词：
Bond-slip; Constitutive model; Deicer-frost action; Reinforced concrete;
D O I：
10.3969/j.issn.1007-9629.2017.05.006
中图分类号：
学科分类号：
摘要：
To explore the bond-slip behavior and constitutive relationship between the steel bar and the concrete under the deicer-frost environment, through the self-made bidirectional compression type of reinforced concrete pull-out device and the test method in which strain gauges were pasted on the inner milling slot of steel bars, pull-out tests were conducted on reinforced concrete specimens subjected to salt-freezing cycles. Research results show that with the increase of salt-freezing cycles, the ultimate bond strength decreases linearly, the initial sliding load of free end drops gradually, the slippage of free end corresponding to the ultimate bond stress decreases first and then increases; the peak value of bond stress spreads from the loading end toward the free end with increase of loading, the spreading tendency of the peak value is more and more obvious with the increase of degree of freezing-thawing damage. Distribution laws of bond stress and slippage along anchorage length are obtained through theoretical analysis. Based on the above work, the reinforced concrete bond-slip constitutive equation is established under deicer-frost action with considering the position function, which could provide theoretical evidences for the reinforced concrete finite element analysis and the durability assessment under chloride environment of the cold region. © 2017, Editorial Department of Journal of Building Materials. All right reserved.
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页码：692 / 699and793
相关论文
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