Behaviour of concrete-filled steel-tube columns strengthened with high-strength CFRP textile grid-reinforced high-ductility engineered cementitious composites
Behaviour of concrete-filled steel-tube columns strengthened with high-strength CFRP textile grid-reinforced high-ductility engineered cementitious composites
复制标题
高强度CFRP纺织网格增强高延性工程水泥基复合材料增强钢管混凝土柱的性能
DOI：
10.1016/j.conbuildmat.2020.121283
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发表时间：
2020-10
影响因子：
7.4
通讯作者：
Huang Yue
中科院分区：
文献类型：
--
作者：
Yan Yuhong;Liang Hongjun;Lu Yiyan;Huang Yue
在这项研究中，一种新的加固技术，以提高钢管混凝土（CFSTs）的力学性能，耐火性能和耐腐蚀性。所提出的技术涉及使用高强度碳纤维增强聚合物（CFRP）纺织网格增强高延性工程水泥基复合材料（ECC）的钢管混凝土柱的加固。研究了组合柱的轴心受压性能。对27根加固柱和3根未加固的对照柱共30个试件进行了试验研究。试验中考虑的参数为CFRP织物网格层数、径厚比和混凝土强度。试验结果表明，加固后的试件比未加固的试件具有更好的加固效果。与CFRP布加固钢管混凝土柱时发生的脆性破坏不同，CFRP网格增强ECC加固柱的延性与CFRP网格增强钢管混凝土柱的延性一样好，是因为发生了渐进破坏。填充混凝土，其强度增加，由于限制的碳纤维织物网格，抵抗大部分的负荷加强柱。基于不同的模型，推导了承载力预测公式，预测结果具有较高的精度。
In this study, a new strengthening technique was developed to improve the mechanical behaviour, fire resistance, and corrosion resistance of concrete-filled steel tubes (CFSTs). The proposed technique involved the strengthening of CFST columns using high-strength carbon fibre-reinforced polymer (CFRP) textile grid-reinforced high-ductility engineered cementitious composite (ECC). The behaviour of composite columns under axial compression was investigated. A total of 30 specimens, which comprised 27 strengthened columns and three un-strengthened control specimens, were subjected to experimental tests. The parameters considered for the tests were the number of CFRP textile grid layers, diameter–thickness ratio, and concrete strength. The experimental results showed that strengthened specimens exhibited a better strengthening effect than the control specimens. Unlike brittle failure, which occurred when the CFST columns were strengthened with FRP sheets, the ductility of the columns strengthened with CFRP textile grid-reinforced ECC was as good as that of CFSTs because of the occurrence of progressive failure. The in-filled concrete, whose strength increased owing to the confinement of the CFRP textile grids, resisted most of the loads on the strengthened columns. Based on different models, equations were derived to predict the load-bearing capacity, and the predicted results showed high accuracy.
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影响因子：
6.3
作者：
L. Ombres
通讯作者：
L. Ombres
影响因子：
4.6
作者：
H. Toutanji;H. Toutanji;Yong Deng;Yong Deng
通讯作者：
H. Toutanji;H. Toutanji;Yong Deng;Yong Deng
影响因子：
10.5
作者：
Lim, YM;Li, VC
通讯作者：
Li, VC
复合加固层加固钢筋混凝土梁的弯曲性能：BFRP 网格和 ECC
影响因子：
7.4
作者：
Yu-Zhou Zheng;Wen-Wei Wang;John C. Brigham
通讯作者：
John C. Brigham
影响因子：
7.4
作者：
P. Colajanni;F. D. Domenico;A. Recupero;N. Spinella
通讯作者：
P. Colajanni;F. D. Domenico;A. Recupero;N. Spinella