Bond stress-slip relationship in concrete-filled square stainless steel tubes

Peng Dai; Lu Yang; Jie Wang; Manfang Lin; Junwei Fan

doi:10.1016/j.conbuildmat.2022.127001

Bond stress-slip relationship in concrete-filled square stainless steel tubes

Peng Dai, Lu Yang, Jie Wang, Manfang Lin, Junwei Fan

Beijing University of Technology

Research output: Contribution to journal › Article › peer-review

22 Citations (SciVal)

115 Downloads (Pure)

Abstract

The application of stainless steel tubes in concrete-filled steel tube systems can significantly improve their corrosion resistance in comparison with those that employ carbon steel tubes. In this paper, a series of push-out tests were carried out to investigate the bond stress-slip behavior between stainless steel tubes and concrete. A total of 14 concrete-filled square stainless steel tube specimens were tested, covering two cross-sectional width-thickness ratios (B/t = 30 and 50), two concrete strength (f_cu = 44 and 76 MPa), three rib stiffener types (ordinary, saw-shaped and perfobond leister) and two stainless steel grades (austenitic and duplex). The test results indicate that B/t, f_cu and stainless steel grade have noticeable influences on the ultimate bond stress (τ_u) in concrete-filled square stainless steel tube and the addition of rib stiffeners significantly improves the bond behavior. The bond mechanism at different stages of loading and the effect of various parameters on τ_u are discussed. Based on the test results, an idealized bond stress-slip strain (τ-ε_S) curve was proposed, where good agreement between the test and the proposed model has been achieved.

Original language	English
Article number	127001
Journal	Construction and Building Materials
Volume	326
Early online date	2 Mar 2022
DOIs	https://doi.org/10.1016/j.conbuildmat.2022.127001
Publication status	Published - 4 Apr 2022

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant No. 51922001), Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 51421005).

Funding

This work was supported by the National Natural Science Foundation of China (Grant No. 51922001), Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 51421005).

Keywords

Bond stress-slip relationship
Concrete-filled square stainless steel tube
Push-out test
Rib stiffeners
Strain distribution

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
General Materials Science

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10.1016/j.conbuildmat.2022.127001

Accepted manuscript-Square bond relationship.PDFAccepted author manuscript, 1.43 MBLicence: CC BY-NC-ND

Cite this

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abstract = "The application of stainless steel tubes in concrete-filled steel tube systems can significantly improve their corrosion resistance in comparison with those that employ carbon steel tubes. In this paper, a series of push-out tests were carried out to investigate the bond stress-slip behavior between stainless steel tubes and concrete. A total of 14 concrete-filled square stainless steel tube specimens were tested, covering two cross-sectional width-thickness ratios (B/t = 30 and 50), two concrete strength (fcu = 44 and 76 MPa), three rib stiffener types (ordinary, saw-shaped and perfobond leister) and two stainless steel grades (austenitic and duplex). The test results indicate that B/t, fcu and stainless steel grade have noticeable influences on the ultimate bond stress (τu) in concrete-filled square stainless steel tube and the addition of rib stiffeners significantly improves the bond behavior. The bond mechanism at different stages of loading and the effect of various parameters on τu are discussed. Based on the test results, an idealized bond stress-slip strain (τ-εS) curve was proposed, where good agreement between the test and the proposed model has been achieved.",

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author = "Peng Dai and Lu Yang and Jie Wang and Manfang Lin and Junwei Fan",

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AU - Yang, Lu

AU - Wang, Jie

AU - Lin, Manfang

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N2 - The application of stainless steel tubes in concrete-filled steel tube systems can significantly improve their corrosion resistance in comparison with those that employ carbon steel tubes. In this paper, a series of push-out tests were carried out to investigate the bond stress-slip behavior between stainless steel tubes and concrete. A total of 14 concrete-filled square stainless steel tube specimens were tested, covering two cross-sectional width-thickness ratios (B/t = 30 and 50), two concrete strength (fcu = 44 and 76 MPa), three rib stiffener types (ordinary, saw-shaped and perfobond leister) and two stainless steel grades (austenitic and duplex). The test results indicate that B/t, fcu and stainless steel grade have noticeable influences on the ultimate bond stress (τu) in concrete-filled square stainless steel tube and the addition of rib stiffeners significantly improves the bond behavior. The bond mechanism at different stages of loading and the effect of various parameters on τu are discussed. Based on the test results, an idealized bond stress-slip strain (τ-εS) curve was proposed, where good agreement between the test and the proposed model has been achieved.

AB - The application of stainless steel tubes in concrete-filled steel tube systems can significantly improve their corrosion resistance in comparison with those that employ carbon steel tubes. In this paper, a series of push-out tests were carried out to investigate the bond stress-slip behavior between stainless steel tubes and concrete. A total of 14 concrete-filled square stainless steel tube specimens were tested, covering two cross-sectional width-thickness ratios (B/t = 30 and 50), two concrete strength (fcu = 44 and 76 MPa), three rib stiffener types (ordinary, saw-shaped and perfobond leister) and two stainless steel grades (austenitic and duplex). The test results indicate that B/t, fcu and stainless steel grade have noticeable influences on the ultimate bond stress (τu) in concrete-filled square stainless steel tube and the addition of rib stiffeners significantly improves the bond behavior. The bond mechanism at different stages of loading and the effect of various parameters on τu are discussed. Based on the test results, an idealized bond stress-slip strain (τ-εS) curve was proposed, where good agreement between the test and the proposed model has been achieved.

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Bond stress-slip relationship in concrete-filled square stainless steel tubes

Abstract

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Keywords

ASJC Scopus subject areas

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