Study on axial compression performance of concrete stub column strengthened by prestressed steel hoop

被引：0
|
作者：
Xie J. [1 ,2 ,3 ]
Yang L. [1 ]
Xu F.-Q. [4 ]
机构：
[1] School of Civil Engineering, Tianjin University, Tianjin
[2] Key Laboratory of Coast Civil Structure Safety, Ministry of Education, Tianjin University, Tianjin
[3] Beijing Engineering Research Center of Existing Building Renovation(Tianjin branch), Tianjin
[4] China Academy of Building Research Co., LTD., Beijing
来源：
Gongcheng Lixue/Engineering Mechanics | 2020年 / 37卷 / 11期
关键词：
Active constraint; Axial compression column; Calculation model; Prestressed steel hoop; Reinforcement technology;
D O I：
10.6052/j.issn.1000-4750.2020.01.0020
中图分类号：
学科分类号：
摘要：
Both thirty-three concrete stub columns reinforced by prestressed steel hoops (PSHC) and nine unreinforced columns were tested under axial compression. The studied parameters were the hoop ratio (the spacing of hoops and the concrete diameter), the prestressing level and the initial axial compression ratio. The influences of these parameters on the carrying capacity and deformation capacity of PSHC were obtained and discussed. The results show that the bearing capacity and deformation capacity of the PSHC can be improved by 107% and 540%, respectively, compared with the comparison column. The reinforcement effect will become better with the increase of the hoop ratio. When the prestress ratio increases gradually, the carrying capacity of PSHC increases gradually and the peak strain decreases gradually. The initial axial compression ratio has no obvious influence on the reinforcement effect, the PSHC can be used as a non-unloading reinforcement method. Based on the experiment results, a prediction equation was proposed and verified by the comparison of prediction values and test data in this investigation and other references. Copyright ©2020 Engineering Mechanics. All rights reserved.
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页码：195 / 208
页数：13
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