TY - JOUR
T1 - Bond stress-slip relationship in concrete-filled square stainless steel tubes
AU - Dai, Peng
AU - Yang, Lu
AU - Wang, Jie
AU - Lin, Manfang
AU - Fan, Junwei
N1 - 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).
PY - 2022/4/4
Y1 - 2022/4/4
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.
KW - Bond stress-slip relationship
KW - Concrete-filled square stainless steel tube
KW - Push-out test
KW - Rib stiffeners
KW - Strain distribution
UR - http://www.scopus.com/inward/record.url?scp=85125869694&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2022.127001
DO - 10.1016/j.conbuildmat.2022.127001
M3 - Article
AN - SCOPUS:85125869694
VL - 326
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 127001
ER -