Energy Absorption Capacity of Concrete-Filled Steel Tube Slender Columns with Different Aspect Ratios
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Abstract
The present paper examines the energy absorption capacity of concrete-filled steel tube slender (CFTS) columns having different aspect ratios. The CFTS columns are nonlinearly analysed employing the finite element software ABAQUS. In order to validate the simulation of the columns, an experimentally tested CFTS column is simulated and its achieved result is compared with that of the tested column. Since it is concluded that there is a good agreement between the obtained results from the simulation and experimental test, the validation of the simulation is then established. The simulated columns are thereafter developed using different aspect ratios of 6, 10, and 13 and also considering the following parameters: load eccentricities, cross-sectional shapes, and steel tube thicknesses. The columns are nonlinearly analysed and the results are achieved from the analyses. The effects of the above-mentioned parameters on the energy absorption capacity of the CFTS columns are evaluated. From the results, it can be concluded that the energy absorption capacity of the columns is decreased by the increase of the load eccentricity or aspect ratio. Further, the energy absorption capacity of the circular CFTS column is greater than that of the rectangular and square CFTS columns. However, higher energy absorption capacity is accomplished for the rectangular column than the square column. Additionally, increasing the steel tube thickness leads to greater energy absorption capacity of the columns. Typical failure modes of the columns are assessed.
Keywords: energy absorption capacity; concrete-filled steel tube slender column; aspect ratio; nonlinear analysis; finite element simulation
*Corresponding author: E-mail: Alireza.Bahrami@hig.se
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