Experiment Study on Interfacial Normal Bond Strength of Concrete Filled Steel Tube

Abstract:

To study the debonding of concrete filled steel tube (CFST), pulling and bending methods were used to test the normal bond strength. Based on the test result, debonding due to temperature change and shrinkage of core concrete in CFST was analyzed. The test and analysis result shows that the bending method is a better test method; the concrete strength has little influence on bond strength while the surface condition of steel has much influence on it. The bond strength of steel which is rust is greater than that of the steel with smooth surface. According to the analysis on the bending test result, the normal bond strength of 0.86MPa was got and the debonding of CFST arch was analyzed, the analysis result shows that debonding will easily happen under the action of temperature change and shrinkage of core concrete. The test methods and results can provide a reference for engineering applications.

• Periodical: Advanced Materials Research (Volumes 594-597)
• Pages: 947-954
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.594-597.947
• Online since: November 2012
• Authors: Zhen Yu Liu
• Keywords: Bond Strength, Concrete-Filled Steel Tube (CFST), Experiment, Interface

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