Experimental Investigation and Analysis of Bond–Slip Behavior between Geopolymer Concrete and Steel Tube with Varying Structural Measures
Open accessAbstract
In this study, push-out tests were conducted on 20 specimens to explore the bond–slip performance of geopolymer concrete-filled steel tubes. The investigation focused on the effects of various design parameters such as length–diameter ratio, diameter–thickness ratio, concrete strength, and internal structural measures of the steel tube on the bond–slip performance. Analysis of the test phenomena, load–slip curves, and strain distribution curves of each specimen revealed insights into the shear strength calculation methods for welded stud structure and ring rib structure specimens. The results indicated a slight buckling deformation at the loading end of the steel tube in the structural specimen, while no significant deformation was observed in the non-structural specimen. The strain distribution along the height direction of the steel tube exhibited a triangular pattern, with the strain increasing gradually. Improvements in the interfacial bonding performance were noted with reductions in length–diameter ratio and diameter–thickness ratio of the steel tube, as well as increases in concrete strength. When the steel tube wall thickness t increases from 3.5 mm to 4.5 mm, the peak load of GC30-1 increases from 382.13 kN to 419.59 kN, an increase of 9.81%. After improving the concrete strength of GC30-1 and GC30-3 specimens, the peak load increases from 382.13 kN and 274.54 kN to 436.46 kN and 306.12 kN, respectively, an increase of 14.2% and 11.5%. Furthermore, the welding structure of the steel tube significantly enhanced the shear bearing capacity of the interface. The ratio of load calculation value to test value fell within the range of 0.917 to 1.098, indicating good agreement between the calculated and experimental values. These research results can provide reference for engineering applications of geopolymer concrete.
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The strain distribution on the surface of the steel tube during the push-out process reflects the transfer effect of the bonding force between the RAC and the steel tube, namely the cooperative working performance of the two.
“The strain distribution on the surface of the steel tube during the push-out process reflects the transfer effect of the bonding force between the RAC and the steel tube, namely the cooperative working performance of the two [44].”
From Investigation on the bond-slip behavior of recycled aggregate concrete-filled steel tube with studs (2025) · cites this paper as [44]
Section 3.3 (page unavailable) explains that bond stress transfers force from the core concrete to the steel tube and relates that transfer to the measured tube strains. The paper studies geopolymer concrete, however, not the recycled aggregate concrete (RAC) specified in the claim. (LLM, conf=0.86)
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- Authors
- Li, D., Wu, C., Song, H., Li, L., Lv, G., & Yang, F.
- Affiliations
- Zhengzhou University of Economics and Business (CN)
- Chongqing Jiaotong University (CN)
- Zhongyuan University of Technology (CN)
- Ruyang County Gongxin Logistics Management, Luoyang 471200, China
- Corresponding author
- Yang, Fei
- Venue
- Buildings
- Publisher
- MDPI AG
- Published
- 2024-08-15
- Volume
- 14
- Issue
- 8
- Pages
- 2516
- ISSN
- 2075-5309 (ISSN-L)
- OpenAlex
- W4401615077
- Cited by
- 5
- References
- 25
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 1
- FWCI
- 0.83
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Buildings (publishedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Discipline Young Master Tutor Program of Zhongyuan University of Technology (SD202425)
- Topics
- Physical Sciences › Engineering › Civil and Structural Engineering › Structural Load-Bearing Analysis
- Physical Sciences › Engineering › Building and Construction › Structural Behavior of Reinforced Concrete
- Physical Sciences › Engineering › Civil and Structural Engineering › Concrete and Cement Materials Research
- Keywords
- geopolymer concrete, concrete-filled steel tubes, bond-slip behavior, push-out test, shear strength, length-to-diameter ratio, diameter-to-thickness ratio, steel tube wall thickness, concrete strength, interfacial bonding, load-slip curves, strain distribution
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