An experimental study on axial compression performance and load capacity analysis of HDC reinforced short columns of damaged concrete
KOU Jialiang1,2, LI Bao1, XU Yan1, JING Guoqiang1, ZHOU Heng3
1.School of Civil Engineering & Architecture, Xi’an University of Technology, Xi’an 710048, China;2.State Key Laboratory of Eco-Hydraulics in Northwest Arid Region,Xi’an University of Technology, Xi’an 710048, China;3.Northwest Engineering Corporation Limited,Power China,Xi’an 710065,China
Abstract:Through the axial compression test of 9 short ductile reinforced concrete short columns reinforced with high ductility concrete (HDC), the effect of HDC reinforcement on the short concrete column reinforced effect under large cross-sectional size and height was studied.The bearing capacity and deformation capacity of HDC reinforced concrete short columns was discussed.The test results show that the peak stress of damaged concrete short columns can reach 80%-90% of the original columns, the peak load can be increased by 10%-30%, the longitudinal ultimate strain can be increased by 47%-141%, the corresponding longitudinal ultimate load can be increased by 48.7%-129.0%, and the transverse ultimate strain can reach 0.42%-0.77%, which is about 2-3 times of that of the original columns before reinforcement.The transverse ultimate load is increased by 23%-112%, the ductility of damaged concrete short columns is greatly enhanced, and the bearing capacity is improved to a certain extent.The whole stress-strain curve is fitted and analyzed and the measured curve fitted well with the calculated one.Based on the failure mechanism and constraint theory, the formula of bearing capacity under axial compression is given.The calculated value of the formula is in good agreement with the experimental data.
寇佳亮,李豹,徐炎,景国强,周恒. 高延性混凝土加固震损混凝土短柱轴压性能试验及承载能力研究[J]. 振动与冲击, 2021, 40(16): 234-244.
KOU Jialiang, LI Bao, XU Yan, JING Guoqiang, ZHOU Heng. An experimental study on axial compression performance and load capacity analysis of HDC reinforced short columns of damaged concrete. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(16): 234-244.
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