Cyclic performance of corroded reinforced concrete short columns strengthened using carbon fiber-reinforced polymer
Cyclic performance of corroded reinforced concrete short columns strengthened using carbon fiber-reinforced polymer
复制标题
碳纤维增强聚合物加固锈蚀钢筋混凝土短柱的循环性能
DOI：
10.1016/j.conbuildmat.2020.118548
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发表时间：
2020-06
影响因子：
7.4
通讯作者：
Huang Jun-Qi
中科院分区：
文献类型：
--
作者：
Xu Yu-Ye;Huang Jun-Qi
钢筋混凝土(RC)构件中的钢筋锈蚀会显著降低其结构性能，这种锈蚀构件通常使用纤维增强聚合物(FRP)进行加固。本文对碳纤维加固锈蚀钢筋混凝土短柱的循环性能进行了试验研究。制作了7根钢筋混凝土短柱，并进行了反复荷载试验。其中，6个试件被腐蚀，1个未被腐蚀。考虑的参数包括CFRP加固层数(0、1、1.5和2层)和细集料的类型(河砂和海砂)。对试件的滞回曲线、破坏模式和荷载-应变关系进行了详细的比较和讨论。此外，对我国规范中FRP加固钢筋混凝土短柱的抗剪计算公式进行了修正，以预测碳纤维布加固锈蚀钢筋混凝土柱的抗剪性能。结果表明：(1)未加固的锈蚀试件的变形能力和耗能能力明显低于未锈蚀试件。(2)经过碳纤维布加固后，这些值都有所提高，甚至高于未锈蚀试件。(3)修正后的公式能较好地预测碳纤维布加固试件的抗剪强度。
Steel corrosion in reinforced concrete (RC) members significantly degrades their structural performance, and such corroded members are typically strengthened using fiber-reinforced polymer (FRP). In this study, the cyclic performance of short corroded columns of RC strengthened with carbon FRP (CFRP) is investigated. Seven short RC columns were fabricated and tested under cyclic loading. Of them, six specimens were corroded and one was uncorroded. The parameters considered included the number of CFRP strengthening layers (zero, one, 1.5, and two) and the type of fine aggregate (river sand and sea sand). The hysteretic curves, failure modes, and load–strain relationships of the specimens were compared and are discussed in detail. Furthermore, the equation for calculating the shear resistance of FRP-strengthened short RC columns in Chinese code has been modified to predict the shear resistance of the corroded RC columns strengthened with CFRP. The results show the following: (1) The deformability and energy dissipation of the corroded specimens without CFRP strengthening were significantly lower than those of the uncorroded counterpart. (2) Through CFRP strengthening, these values were improved and were even higher than those of the uncorroded specimen. (3) The modified equation can predict the shear resistance of CFRP-strengthened specimens.
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影响因子：
7.4
作者：
Shu-Yan Yang;Xiaobing Song;H. Jia;Xi Chen;Xi-la Liu
通讯作者：
Shu-Yan Yang;Xiaobing Song;H. Jia;Xi Chen;Xi-la Liu
影响因子：
13.1
作者：
Alireza Saljoughian;D. Mostofinejad
通讯作者：
Alireza Saljoughian;D. Mostofinejad
影响因子：
7.4
作者：
N. Moshiri;A. Hosseini;D. Mostofinejad
通讯作者：
N. Moshiri;A. Hosseini;D. Mostofinejad
影响因子：
5.5
作者：
Alireza Saljoughian;D. Mostofinejad
通讯作者：
Alireza Saljoughian;D. Mostofinejad
影响因子：
5.5
作者：
Meda, Alberto;Mostosi, Serena;Riva, Paolo
通讯作者：
Riva, Paolo