Research on Mechanical Properties of Curved Concrete-Filled Stainless Steel Tubular Members Under Bending

ZHENG Lianqiong; ZHOU Zicheng; CHEN Min; ZHENG Yongqian

doi:10.13204/j.gyjzG22100701

Volume 53 Issue 8

Aug. 2023

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ZHENG Lianqiong, ZHOU Zicheng, CHEN Min, ZHENG Yongqian. Research on Mechanical Properties of Curved Concrete-Filled Stainless Steel Tubular Members Under Bending[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(8): 118-126. doi: 10.13204/j.gyjzG22100701

Citation:

ZHENG Lianqiong, ZHOU Zicheng, CHEN Min, ZHENG Yongqian. Research on Mechanical Properties of Curved Concrete-Filled Stainless Steel Tubular Members Under Bending[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(8): 118-126. doi: 10.13204/j.gyjzG22100701

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Research on Mechanical Properties of Curved Concrete-Filled Stainless Steel Tubular Members Under Bending

doi: 10.13204/j.gyjzG22100701

1. School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China;
2. Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering, Fuzhou 350118, China

Received Date: 2022-10-07
Available Online: 2023-10-17

Abstract

Abstract

A total of 5 specimens, including 3 curved concrete-filled stainless steel tubes (CCFSST), one straight concrete filled stainless steel tube (CFSST) and one curved hollow stainless steel tube (CHSST) were tested to study the effects of initial curvature ratio and infilled concrete on the mechanical poperties of CCFSST under bending. The test results showed that with the increase of initial curvature ratio of specimens, the flexural stiffness and flexural bearing capacity of specimens increased compared with the corresponding hollow stainless steel tubular specimen, the concrete filling in the tube could significantly improve the flexural stiffness and flexural bearing capacity of specimens. The finite element software ABAQUS was used to analyze the mechanical characteristics and load versus midspan deflection curves of CCFSST under bending, and compared with plain carbon steel members. The results of the finite element analysis were in good agreement with the test results in general. Based on the elastic stiffness model, the influence formula of initial curvature ratio on the elastic bending stiffness of CCFSST members was deduced, and the calculated results of the formula were in good agreement with the experimental results. Based on parametric analysis, compared with plain carbon steel members, the bearing capacity of CCFSST members was increased by 10% and the bending stiffness was reduced by 15%, respectively. Using the existing codes for straight concrete-filled steel tubes to calculate the ultimate flexural capacity of CCFSST members, and the modified flexural stiffness formula can be more accurately applied to the design of CFSST.
- curved concrete-filled stainless steel tube,
- bending test,
- finite element analysis,
- flexural bearing capacity,
- flexural stiffness

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References(17)

References

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