Experimental and numerical study on short eccentric columns strengthened by textile-reinforced concrete under sustaining load
Experimental and numerical study on short eccentric columns strengthened by textile-reinforced concrete under sustaining load
复制标题
织物增强混凝土短偏心柱持续荷载试验与数值研究
DOI：
10.1177/0731684417725396
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发表时间：
2017-08
期刊：
影响因子：
--
通讯作者：
Li Yingjie
中科院分区：
文献类型：
--
作者：
Liu Dejun;Huang Hongwei;Zuo Jianping;Duan kang;Xue Yadong;Li Yingjie
针对不能用缠绕法加固的偏心受压结构，进行了在受拉面应用钢筋混凝土进行抗弯加固的试验和数值研究。建造了7根短柱，并进行了偏心受压试验。其中一根柱没有经过任何加固，被用作控制柱，而其余六根柱则通过纺织钢筋混凝土层进行了外部加固。考虑到的主要参数包括：(A)砂浆类型，(B)预载水平，以及(C)纺织钢筋混凝土层数。除了实验程序外，还利用非线性有限元分析进行了数值研究，实验结果与数值结果吻合较好。进一步，将数值分析扩展到更多的案例，以加深对弯曲增强机理的理解。结果表明，纺织混凝土显著提高了偏心受压柱的抗弯承载力，且纺织层数越多，提高幅度越大。但是，预紧力对加固效果有明显的不利影响，因为预紧力会导致织物的应变损失，预紧力水平越大，损失越大。
For the eccentric compression structures which cannot be strengthened by wrap method, this paper presents an experimental and numerical study on flexural strengthening by applying textile reinforced concrete at the tensile face. Seven short columns were constructed and tested under eccentric load. One of the columns did not receive any strengthening and was used as the control column, whereas the rest six were externally upgraded by textile-reinforced concrete layers. The main parameters taken into account covered: (a) type of mortar, (b) preload level, and (c) number of textile-reinforced concrete layers. Besides the experimental program, a numerical investigation utilizing non-linear finite element analysis was carried out and a good agreement was obtained between the experimental and numerical results. Further, the numerical analysis was extended to additional cases to deepen the understanding of flexural-enhancing mechanism . It is concluded that textile-reinforced concrete substantially increases the flexural capacity of the eccentric compression columns; the more the textile layer, the greater the gain. However, the preload has an apparently adverse influence on the strengthening effectiveness, as it causes the strain loss of the textile; the bigger the preload level, the more the loss.
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影响因子：
1.8
作者：
T. Triantafillou
通讯作者：
T. Triantafillou
影响因子：
5.5
作者：
Schladitz, Frank;Frenzel, Michael;Curbach, Manfred
通讯作者：
Curbach, Manfred
影响因子：
13.1
作者：
Z. Tetta;L. Koutas;D. Bournas
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Z. Tetta;L. Koutas;D. Bournas
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作者：
Mofidi, Amir;Thivierge, Sebastien;Shao, Yixin
通讯作者：
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影响因子：
13.1
作者：
Z. Tetta;L. Koutas;D. Bournas
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