| Civil Engineering |
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| Influencing factors of seismic performance of RC columns strengthened with textile reinforced concrete |
| YIN Shi-ping, LI Yao,YANG Yang, YE Tao |
| 1. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China;
2. Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China |
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Abstract Nine RC square columns were tested under low cyclic loading in order to analyze the seismic behavior of reinforced concrete (RC) columns strengthened with textile reinforced concrete (TRC). The effects of textile layer,lap length, stirrup ratio and axial compression ratio on the seismic behavior of RC columns were analyzed.The results show that the cracking load and yield load of the column do not change significantly, but the peak load, displacement ductility factor and energy dissipation capacity are enhanced with the increase of the number of textile layer within a certain range.The lap length of textile affects little on seismic performance of columns under the requirement of anchoring.The displacement ductility factor and energy dissipation capacity are enhanced, but the stiffness degradation rate decreases with the increase of stirrup ratio or the decrease of axial compression ratio.In all, TRC can effectively constraint the core concrete, reduce the failure height of plastic hinge region, and improve the failure modes of RC columns.
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Published: 01 May 2017
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Cite this article:
YIN Shi-ping, LI Yao,YANG Yang, YE Tao. Influencing factors of seismic performance of RC columns strengthened with textile reinforced concrete. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(5): 904-913.
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纤维编织网增强混凝土加固RC柱抗震性能的影响因素
为了研究纤维编织网增强混凝土（TRC）加固钢筋混凝土(RC)柱的抗震性能，对9根TRC加固RC方柱进行了低周往复加载试验，分析加固层数、搭接长度、配箍率、轴压比对柱子抗震性能的影响.结果表明：在一定层数内，随着加固层数的增加，柱的开裂和屈服荷载无明显变化，而峰值荷载、位移延性系数、耗能能力呈上升趋势；在满足锚固要求下，纤维编织网搭接长度对柱抗震性能的影响不明显；随着配箍率增加或轴压比减小，柱的延性系数和耗能能力有所提高，刚度退化速率降低.总之，TRC能有效约束RC柱核心区混凝土，降低试件塑性铰区的破坏高度，改善RC柱的破坏形态.
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