Mechanical behavior of concrete-filled double steel tubular stub columns under axial compression

被引：0
|
作者：
Shi Y. [1 ]
Li X. [1 ]
Wang W. [1 ]
Ji S. [1 ]
机构：
[1] School of Civil Engineering, Lanzhou University of Technology, Lanzhou
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2023年 / 44卷 / 07期
关键词：
axial compressive capacity; axial compressive test; concrete-filled double steel tube (CFDT); finite element analysis;
D O I：
10.14006/j.jzjgxb.2022.0057
中图分类号：
学科分类号：
摘要：
To study the axial compressive performance of concrete-filled double steel tubular (CFDT) stub columns, 20 CFDT stub columns with circular and square cross-sections were tested. The factors influencing the failure modes, the capacity and ductility of stub columns were considered, including the ratio of inner steel tube, the cross-section type and the diameter(width)-thickness ratio of the outer steel tube. A comparative test on two concrete-filled steel tubular (CFST) stub columns was also carried out. The tested results show that the capacity of CFST stub columns is improved and the shear failure is also prevented by inserting the circular steel tube in the columns. The capacity of CFDT stub columns improves with increasing the ratio of inner steel tube and the diameter(width)-thickness ratio of outer steel tube. For two CFDT columns with the same inner steel tube, the circular specimens show a better carrying capacity than the square ones. A good ductility behavior is also observed from two CFDT columns. The average maximum decrease on the ultimate capacity of circular and square CFDT stub columns after the peak load is 2. 9% and 11. 9%, respectively. Then, a numerical model on the CFDT stub columns was established by the finite element software ABAQUS and was utilized to simulate the tested results. A good prediction result is observed from the test and simulated load-deformation curves. The working mechanism of the typical CFDT stub columns was further analyzed, including the load-deformation curve, the distribution of sectional stress, as well as the development of interaction stress. It shows that the inner concrete is subject to the double confinement effect of inner and outer steel tubes. Based on two superposition methods and different formulas for the axial capacity of CFST stub columns, the simplified methods were finally proposed to calculate the axial capacity of CFDT stub columns with circular and square cross-sections, and exhibited a good calculation accuracy. © 2023 Science Press. All rights reserved.
引用
收藏
页码：129 / 141
页数：12
相关论文
共 29 条
  • [1] LIEW J R, XIONG D., Ultra-high strength concrete filled composite columns for multi-storey building construction, Advances in Structural Engineering, 15, 9, pp. 1487-1503, (2012)
  • [2] EKMEKYAPAR T, AI-ELIWI B J M., Concrete filled double circular steel tube (CFDCST) stub columns, Engineering Structures, 135, pp. 68-80, (2017)
  • [3] EKMEKYAPAR T, ALWAN O H, HASAN H G, Et al., Comparison of classical, double skin and double section CFST stub columns: experiments and design formulations, Journal of Constructional Steel Research, 155, pp. 192-204, (2019)
  • [4] FANG Xiaodan, LIN Sijia, Axial compressive test of columns with multi barrel tube-confined high performance concrete, Journal of Building Structures, 35, 4, pp. 236-245, (2014)
  • [5] ROMERO M L, ESPINOS A, PORTOLES J M, Et al., Slender double-tube ultra-high strength concrete-filled tubular columns under ambient temperature and fire, Engineering Structures, 99, pp. 536-545, (2015)
  • [6] QIAN J R, LI N B, JI X D, Et al., Experimental study on the seismic behavior of high strength concrete filled double-tube columns, Earthquake Engineering and Engineering Vibration, 13, pp. 47-57, (2014)
  • [7] ZHENG Y, HE C, ZHENG L., Experimental and numerical investigation of circular double-tube concrete-filled stainless steel tubular columns under cyclic loading, Thin-walled Structures, 132, pp. 151-166, (2018)
  • [8] XIAN W, CHEN W S, HAO H, Et al., Investigation on the lateral impact responses of circular concrete-filled double-tube (CFDT) members, Composite Structures, 225, (2021)
  • [9] PENG Yingyi, TAN Kefeng, YAO Yong, Mechanical properties of duplex steel tube high-strength concrete short columns under axial compression, Journal of Wuhan University Technology, 33, 2, pp. 105-109, (2011)
  • [10] HASSANEIN M F, KHAROOB O F, LIANG Q Q., Behaviour of circular concrete-filled lean duplex stainless steel-carbon steel tubular short columns, Engineering Structures, 56, pp. 83-94, (2013)
123