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Volume 55 Issue 6
Dec.  2020
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Article Contents
Journal of Southwest Jiaotong University  > 2020  >  55(6): 1280-1286.
LIU Jian, ZHANG Pengcheng, JIANG Jin, TIAN Yong, LIU Changjiang, CHEN Yuan, ZHANG Shihao, CAO Zhanbin. Axial Bearing Capacity Analysis of H-Section Steel-Reinforced Recycled Aggregate Concrete Filled Circular Steel Tube Stub Columns[J]. Journal of Southwest Jiaotong University, 2020, 55(6): 1280-1286. doi: 10.3969/j.issn.0258-2724.20190244
Citation: LIU Jian, ZHANG Pengcheng, JIANG Jin, TIAN Yong, LIU Changjiang, CHEN Yuan, ZHANG Shihao, CAO Zhanbin. Axial Bearing Capacity Analysis of H-Section Steel-Reinforced Recycled Aggregate Concrete Filled Circular Steel Tube Stub Columns[J]. Journal of Southwest Jiaotong University, 2020, 55(6): 1280-1286. doi: 10.3969/j.issn.0258-2724.20190244
shu

Axial Bearing Capacity Analysis of H-Section Steel-Reinforced Recycled Aggregate Concrete Filled Circular Steel Tube Stub Columns

doi: 10.3969/j.issn.0258-2724.20190244
  • Received Date: 22 Mar 2019
  • Rev Recd Date: 01 Sep 2019
    • Available Online: 04 Sep 2019
  • Publish Date: 15 Dec 2020
    Abstract
  • In order to investigate the axial compressive properties of H-section steel-reinforced recycled aggregate concrete filled circular steel tube stub columns, the axial bearing capacity calculation formula of this kind of member was theoretically derived. Based on limit analysis and twin shear unified strength theory, bearing capacities of the recycled concrete in H-section steel confined zone and the recycled concrete in steel tube confined zone were calculated, respectively, according to the different restraint effect of H-section steel and steel tube on the recycled concrete in the core area. On this basis, a set of formulas for calculating the axial bearing capacity of H-section steel-reinforced recycled aggregate concrete filled circular steel tube stub columns was put forward, which took into consideration the influences of parameters such as the ratio of inner diameter to thickness of steel tubes, the hoop coefficient, the steel distribution index of H-section steel, and the replacement rate of recycled coarse aggregate on the axial bearing capacity of short columns, and can also be applied to calculate the axial bearing capacity of the recycled aggregate concrete filled circular steel tube stub columns without H-section steel reinforcement. The derived effective binding force of steel tubes is brought into the proposed formula to calculate their axial bearing capacity and compared with test values. Results show that the calculated results agree well with the test values, and the error between them is within 10%, which verifies the validity and accuracy of the proposed calculation formula.

     

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