Experimental study on the steel–concrete bond behaviour of circular concrete-filled stainless steel tubes

Dai, Peng; Liu, Yang; Wang, Jie; Fan, Junwei; Lin, Manfang

doi:10.1016/j.tws.2021.108506

Cited by 20 publications

(2 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Meanwhile, the specimens displayed a very minor change in τu, for different concrete ages. The reduction factors obtained from the test results for ambient-temperature RCFSST specimens and the reduction factors reported in the literature [21,23,32,33] for various parameters are shown in Figure 15. It was clear from Figure 15 that the bond strength can be enhanced by providing internal rings, but on the other hand, the change in surface roughness of the internal steel tube also contributed to a greater extent.…”

Section: Figure 14 τ-S Curve For Ambient Temperature Rcfsst Columns W...mentioning

confidence: 96%

Bond Strength of Rectangular CFSST Columns after Exposed to Elevated Temperature

K.,

Santhi

2024

Civ Eng J

View full text Add to dashboard Cite

This article investigates the bond- behavior of Rectangular Concrete-filled stainless-steel tubular (RCFSST) columns under post-fire conditions. The main objective of this research was to obtain τ-s relationship of RCFSST columns under the combined effects of high temperature and concrete age. A total of sixteen specimens, including four reference specimens, were tested with different parameters, namely: i) temperature (600 °C, 800 °C & 1000 °C) ii) different concrete ages (30 days, 60 days, 90 days & 180 days). Analyzing the τ-s curves of the test specimens, chemical adhesion and micro-locking were the principal forces contributing to bond strength at lower concrete ages under post-fire conditions. At a higher concrete age, RCFSST specimens displayed a longer curve after the inflection point, indicating the contribution of macro-locking forces in amplifying the bond-strength. Five distinct curve types were found from the experiments. Type 1 curves with three stages, i) initial linear, ii) non-linear, and ii) final linear stage, had a higher frequency among the other types. For 90-day cured specimens, a decline in bond strength was observed at higher temperatures, but for 180 days cured specimens, a significant rise was seen under post-fire conditions. A new set of τ-s relations for RCFSST columns with different concrete ages under post-fire was established. Doi: 10.28991/CEJ-2024-010-03-019 Full Text: PDF

show abstract

Section: Figure 14 τ-S Curve For Ambient Temperature Rcfsst Columns W...mentioning

confidence: 96%

Bond Strength of Rectangular CFSST Columns after Exposed to Elevated Temperature

K.,

Santhi

2024

Civ Eng J

View full text Add to dashboard Cite

show abstract

“…It should be noted that these previous studies have only proved the lower bond strength of CFSSTs compared with CFSTs, whereas a design value has not been proposed. The only established bond stress-slip (τ-S) relationship can be found in the authors' previous study [37], where push-out tests were performed on 12 circular CFSST specimens and the proposed τ-S relationship was in a function of the diameter-wall thickness ratio (D/t) of the tube and the concrete strength (fcu). This previous study [37] has also shown that adding internal rings can be an effective method to enhance the bond strength of circular CFSST members.…”

Section: Introductionmentioning

confidence: 99%

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

Dai

Liu

Wang

et al. 2022

Construction and Building Materials

Self Cite

View full text Add to dashboard Cite

Experimental study on bond performance of recycled coarse aggregates concrete with circular steel tubes after freeze–thaw cycling

Hu,

Wu,

Feng

et al. 2024

Structural Concrete

View full text Add to dashboard Cite

Extrusion tests were conducted on recycled coarse aggregate concrete with circular steel tubes (RCCST, 100% replacement of recycled coarse aggregate) to investigate the impact of freeze–thaw cycles on bond properties. RCCST samples were subjected to 0, 25, 50, 75, 100, 125 and 150 freeze–thaw cycles and their bond properties were then compared with those of natural coarse aggregate concrete with circular steel tubes (NCCST) after 0, 100 and 150 freeze–thaw cycles. The experimental results indicate that freeze–thaw cycling damages the internal structure of RCCST, causing a significant decrease in interfacial bond strength with an increase in the number of freeze–thaw cycles. Freeze–thaw RCCST exhibits lower peak load and higher peak slip compared to NCCST, with increases of 25.2%, 73.2%, and 70.3% after 0, 100, and 150 freeze–thaw cycles, respectively. Regression analysis was used to derive an exponential equation that describes the relationship between longitudinal strain and strain gauge position. Additionally, a segmented fitting method was employed to obtain an expression for the bond slip of the freeze–thaw RCCST with a circular steel pipe.

show abstract

Experimental study on the steel–concrete bond behaviour of circular concrete-filled stainless steel tubes

Cited by 20 publications

References 35 publications

Bond Strength of Rectangular CFSST Columns after Exposed to Elevated Temperature

Bond Strength of Rectangular CFSST Columns after Exposed to Elevated Temperature

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

Experimental study on bond performance of recycled coarse aggregates concrete with circular steel tubes after freeze–thaw cycling

Contact Info

Product

Resources

About