Experimental study on seismic behavior and shear capacity of diagonally reinforced fiber-reinforced concrete coupling beams with small span-to-depth ratio
Liang Xingwen1 Liu Zhenzhen1 Xing Pengtao1 Deng Mingke1 Che Jialing2
1. Xi′an University of Architecture and Technology, Xi′an 710055, China；
2. Ningxia University, Yinchuan 750002， China
Abstract： In order to improve the seismic performance of coupling beams with small span-to-depth ratio, considering the effect of the span-to-depth ratio and ratio of diagonal reinforcement, lacing wires were added on diagonal bars based on the former experimental results. Three diagonally fiber-reinforced concrete (FRC) coupling beam specimens with small span-to-depth ratio were tested under reversed cyclic lateral loading. The failure mode, hysteresis energy dissipation, stiffness degradation and ductility of the coupling beams were analyzed. The calculation formula of shear capacity was established based on the experimental results and the shear mechanism of coupling beams with small span-to-depth ratio. The results show after the lacing wires are added on the diagonal bars in diagonally reinforced FRC coupling beams with small span-to-depth ratio, the failure modes of coupling beams with span-to-depth ratio of 1.25 and 1.5 change from brittle shear failure to flexural-shear failure. Furthermore, the ductility, damage resistance and energy dissipation capacity are improved. The calculating results of shear capacity agree well with the experimental data, which proves the effectiveness of the proposed formula.
梁兴文 刘贞珍 邢朋涛 邓明科 车佳玲. 纤维增强混凝土对角斜筋小跨高比连梁抗震性能试验研究及受剪承载力分析[J]. 土木工程学报, 2017, 50(2): 27-35.
Liang Xingwen Liu Zhenzhen Xing Pengtao Deng Mingke Che Jialing. Experimental study on seismic behavior and shear capacity of diagonally reinforced fiber-reinforced concrete coupling beams with small span-to-depth ratio. 土木工程学报, 2017, 50(2): 27-35.
