Fatigue Damage Study on RC Beams Strengthened with CFRP Sheets and Steel Plate Based on Residual Strain of Concrete

被引：0
|
作者：
Hu L. [1 ]
Lu Y. [1 ]
Li S. [1 ]
Liu Z. [1 ]
机构：
[1] School of Civil Engineering, Wuhan University, Wuhan
来源：
Yingyong Jichu yu Gongcheng Kexue Xuebao/Journal of Basic Science and Engineering | 2019年 / 27卷 / 01期
关键词：
CFRP; Composite strengthening; Damage model; Residual strain; Steel plate;
D O I：
10.16058/j.issn.1005-0930.2019.01.014
中图分类号：
学科分类号：
摘要：
An experimental study on the fatigue behavior of reinforced concrete (RC) beams strengthened with carbon fiber reinforced polymer (CFRP) and steel plate was conceived, designed and performed. The developing tendency of total fatigue strain and cumulative residual strain of concrete at the compressive edge with the increase of fatigue loading cycles were observed and analyzed. Based on the experimental data, the cumulative residual strain evolution equation of concrete at the compressive edge was present. Finally, the damage evolution curve was obtained by calculating damage variable defined with cumulative residual strain of concrete at the compressive edge. The results show that, as fatigue load amplitude and fatigue cycles increase, total fatigue strain and cumulative residual strain of concrete at the compressive edge of CFRP-steel plate composite strengthened RC beams increase and three-phase behavior is shown; damage model based on the cumulative residual strain of concrete at the compressive edge can express the fatigue cumulative damage well. The research results lay the theoretical foundation for the remaining fatigue life prediction and damage estimation of beams strengthened with CFRP sheets and steel plate. © 2019, The Editorial Board of Journal of Basic Science and Engineering. All right reserved.
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页码：156 / 166
页数：10
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