Experimental study on axial compressive capacity of corroded concrete filled circular CFRP-steel tube stubs

被引：0
|
作者：
Wang D.-F. [1 ]
Shao Y.-B. [2 ]
Ou J.-L. [1 ]
机构：
[1] School of Mechanical Engineering, Southwest Petroleum University, Chengdu
[2] School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu
来源：
Gongcheng Lixue/Engineering Mechanics | 2021年 / 38卷 / 10期
关键词：
Axial compressive capacity; Calculation of ultimate strength; Carbon fiber reinforced polymer; Concrete filled circular steel tube stubs; Corrosion defects; Experimental test;
D O I：
10.6052/j.issn.1000-4750.2020.10.0732
中图分类号：
学科分类号：
摘要：
The axial compressive capacities of non-corroded concrete filled circular steel tube (T4.5-CFST) stubs, corroded concrete filled circular steel tube (C-CCFST) stubs, and CFRP-corroded concrete filled circular steel tube (CFRP-C-CCFST) stubs were studied experimentally. The corrosion defects were simulated by material removal. A total of 19 specimens were tested, including one T4.5-CFST stub, eight C-CCFST stubs, and ten CFRP-C-CCFST stubs. Within the ranges of the test parameters, the test results show that the ultimate strengths of the C-CCFST specimens were lower than those of the T4.5-CFST specimen by 3.0% to 22.9%. The ultimate strengths of the CFRP-C-CCFST specimens were increased by 26.8% to 49.8% as compared with those of the C-CCFST specimens. Compared with the C-CCFST specimens, the CFRP-C-CCFST specimens had greater axial compressive stiffness and ultimate strengths due to the confinement effect of the CFRP. The ultimate strengths of the CFRP-C-CCFST specimens were higher than that of the T4.5-CFST specimen, indicating that the specimens strengthened by CFRP have better mechanical performance. The local buckling of the steel tubes with corrosion defects was effectively restrained by the CFRP. In addition, the ultimate strengths of the CFRP-corroded concrete filled circular steel tube stubs were studied theoretically. The accuracy was verified by the experimental results. © 2021, Engineering Mechanics Press. All right reserved.
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页码：188 / 199
页数：11
相关论文
共 34 条
  • [1] Han Linhai, Concrete filled steel tube structures: theory and experience, (2016)
  • [2] Li W, Zhao X L, Han L H., Behavior of CFDST stub columns under preload, sustained load and chloride corrosion, Journal of Constructional Steel Research, 107, pp. 12-23, (2015)
  • [3] Hou C, Han L H, Zhao X L., Full-range analysis on square CFST stub columns and beams under loading and chloride corrosion, Thin-Walled Structures, 68, pp. 50-64, (2013)
  • [4] Wang Qingli, Li Qinglin, Qu Shaoe, Experimental study on corrosion resistance property of circular concrete filled steel tubular beam under long-term loading, Journal of Building Structures, 36, pp. 57-62, (2015)
  • [5] Han L H, Hou C C, Wang Q L., Behavior of circular CFST stub columns under sustained load and chloride corrosion, Journal of Constructional Steel Research, 103, pp. 23-36, (2014)
  • [6] Hua Y X, Han L H, Wang Q L, Et al., Behaviour of square CFST beam-columns under combined sustained load and corrosion: Experiments, Thin-Walled Structures, 136, pp. 353-366, (2019)
  • [7] Hou C C, Han L H, Wang Q L, Et al., Flexural behavior of circular concrete filled steel tubes (CFST) under sustained load and chloride corrosion, Thin-Walled Structures, 107, pp. 182-196, (2016)
  • [8] Chen Mengcheng, Fang Wei, Huang Hong, Static behavior of corroded concrete-filled steel tubular members by simulating acid rain solution, Engineering Mechanics, 37, 2, pp. 34-43, (2020)
  • [9] Chen Mengcheng, Lin Boyang, Huang Hong, Research on the bearing capacity of corroded circular concrete filled steel tubular short columns, Progress in steel building structures, 20, 1, pp. 73-81, (2018)
  • [10] Chen Mengcheng, Lin Boyang, Huang Hong, Research on the bearing capacity of corroded square concrete filled steel tubular short column, Steel Construction, 32, 5, pp. 110-116, (2017)
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