Study on seismic behavior of low ductility RC columns strengthened with textile-reinforced concrete composites

被引：0
|
作者：
Zhang Q. [1 ,2 ]
Zhu X. [1 ]
Gu X. [2 ]
Xie Y. [1 ]
Zhao Y. [3 ]
机构：
[1] College of Civil and Transportation Engineering, Hohai University, Nanjing
[2] Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education, Tongji University, Shanghai
[3] Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2022年 / 43卷 / 12期
关键词：
low ductility; quasi-static test; reinforced concrete column; seismic performance; strengthen; textile-reinforced concrete (TRC) composite;
D O I：
10.14006/j.jzjgxb.2021.0671
中图分类号：
学科分类号：
摘要：
In order to investigate the seismic performance of low ductility RC columns strengthened with textile-reinforced concrete (TRC) composites, low-cycle reversed loading tests were carried out on six column specimens strengthened with TRC and two control column specimens without TRC. The effects of the textile reinforced layers, shear span ratio, axial compression ratio and stirrup ratio on the seismic failure modes of RC columns were studied. The effects of TRC strengthening on the bearing capacity, deformation behavior, load-displacement curve and energy dissipation capacity of low ductility RC columns were analyzed. In addition, the calculation method of equivalent damping ratio of TRC-strengthened columns was proposed. The results indicate that TRC strengthening can obviously improve the low-ductility seismic failure characteristics of RC columns. Compared with the control columns, the yielding load, lateral bearing capacity, ductility and energy dissipation capacity of the TRC-strengthened columns are improved with the increase of number of textile reinforced layers. Furthermore, the yield load, bearing capacity, ductility and energy dissipation can be increased by 31. 3%, 37. 8%, 109. 2% and 10 times, respectively when the RC columns are strengthened by TRC with four textile layers. The calculation method for equivalent damping ratio of TRC-strengthened columns can be used to evaluate the energy dissipation capacity of flexural-shear critical RC columns strengthened by TRC under seismic loading. © 2022 Science Press. All rights reserved.
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页码：49 / 58
页数：9
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共 24 条
  • [1] KAWASHIMA K., Damage of bridges resulting from fault rupture in the 1999 Kocaeli and Duzce, Turkey earthquakes and the 1999 Chi-Chi, Taiwan earthquake, Structural Engineering/ Earthquake Engineering, 19, 2, pp. 179-197, (2002)
  • [2] ZHANG Qin, WANG Na, GONG Jinxin, State of the art of seismic performance including shear effects and failure modes of reinforced concrete columns, Journal of Building Structures, 38, 8, pp. 1-13, (2017)
  • [3] YUAN W, GUO A X, LI H., Seismic failure mode of coastal bridge piers considering the effects of corrosion-induced damage, Soil Dynamics and Earthquake Engineering, 93, pp. 135-146, (2017)
  • [4] BRUCKNER A, ORTLEPP R, CURBACH M., Textile reinforced concrete for strengthening in bending and shear, Materials and Structures, 39, 8, pp. 741-748, (2006)
  • [5] TRIANTAFILLOU T C, PAPANICOLAOU C G., Shear strengthening of reinforced concrete members with textile reinforced mortar (TRM) jackets, Materials and Structures, 39, 1, pp. 93-103, (2006)
  • [6] ELSANADEDY H M, ALMUSALLAM T H, ALSAYED S H, Et al., Flexural strengthening of RC beams using textile reinforced mortar-Experimental and numerical study, Composite Structures, 97, pp. 40-55, (2013)
  • [7] BRUCKNER A, ORTLEPP R, CURBACH M., Anchoring of shear strengthening for T-beams made of textile reinforced concrete (TRC), Materials and Structures, 41, 2, pp. 407-418, (2008)
  • [8] BOURNAS D A, TRIANTAFILLOU T C, ZYGOURIS K, Et al., Textile-reinforced mortar versus FRP jacketing in seismic retrofitting of RC columns with continuous or lap-spliced deformed bars, Journal of Composites for Construction, 13, 5, pp. 360-371, (2009)
  • [9] BOURNAS D A, TRIANTAFILLOU T C, PAPANICOLAOU C G., Retrofit of seismically deficient RC columns with textile-reinforced mortar (TRM) jackets, 4th Colloquium on Textile Reinforced Structures (CTRS4), pp. 471-490, (2009)
  • [10] BOURNAS D A, TRIANTAFILLOU T C., Bar buckling in RC columns confined with composite materials, Journal of Composites for Construction, 15, 3, pp. 393-403, (2011)
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