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1. Bond behaviour in concrete-filled stainless steel hollow sections | |||
TAO Zhong,Han Linhai | |||
Civil and Architectural Engineering 20 January 2012 | |||
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Abstract:This paper studies the bond strength between the stainless steel tube and concrete in concrete-filled stainless steel tubes (CFSST). Push-out tests were conducted to compare the bond strength in CFSST columns with that of reference specimens with carbon steel tubes. The test results indicate that the internal surface of a stainless steel tube is usually smoother than that of a carbon steel tube. For this reason, when stainless steel was used to replace carbon steel, significant decrease in bond strength was observed. From the current test results, it is recommended that suitable measures need to be taken to increase the bond strength if the column size is very large and/or the concrete has a high shrinkage potential. | |||
TO cite this article:TAO Zhong,Han Linhai. Bond behaviour in concrete-filled stainless steel hollow sections[OL].[20 January 2012] http://en.paper.edu.cn/en_releasepaper/content/4463358 |
2. Post-fire bond between the steel tube and concrete in concrete-filled steel tubular columns | |||
TAO Zhong,Han Linhai | |||
Civil and Architectural Engineering 26 December 2011 | |||
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Abstract:Push-out tests were carried out on sixty four concrete-filled steel tubular columns, which had been exposed to ISO 834 standard fire for 90 min or 180 min, respectively. At the same time, twelve unheated specimens were also prepared and tested for comparison. The variables investigated in the bond tests were selected as (a) fire exposure time; (b) cross-section type; (c) cross-sectional dimension; (d) interface length to diameter (or width) ratio; (e) concrete type; (f) fly ash type; and (g) concrete curing condition. The effects of the above different parameters on the bond behaviour are discussed. The test results indicate that fire exposure had a significant effect on the bond between a steel tube and its concrete core. A decrease in bond strength was generally observed for specimens after a fire exposure of 90 min; however, bond strength recovery was found when the fire exposure time was extended to 180 min. Other factors also had influence to some extent. | |||
TO cite this article:TAO Zhong,Han Linhai. Post-fire bond between the steel tube and concrete in concrete-filled steel tubular columns[J]. |
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