Performance and calculations of concrete filled steel tubes (CFST) under axial tension |
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Authors: | Lin-Hai Han Shan-Hu HeFei-Yu Liao |
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Affiliation: | Department of Civil Engineering, Tsinghua University, Beijing, 100084, PR China Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, PR China |
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Abstract: | This paper reports the behavior of concrete filled steel tubes (CFST) under axial tension. A total of 18 specimens were tested. The main parameters were steel ratio, concrete type and bond or unbonded between the steel tube and its core concrete. A finite element model (FEM) was developed to perform mechanism analysis and parametric studies for CFST under axial tension. It was found that the tensile strength of steel tube can be increased due to the existence of the core concrete in CFST. Finally, a simplified formula that can predict the tensile strength was proposed. |
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Keywords: | Concrete filled steel tubes (CFST) Tension Concrete Hollow sections Composite action Failure mode Design Tensile strength |
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