Abstract
This work deals with the investigation of a steel thin-walled C-column subjected to compression due to temperature increase. These experimental studies of the compressed columns in post-buckling state were conducted to determine their load-carrying capacity. To ensure appropriate supports and keeping of columns, plates with grooves were constructed. The tests of the columns’ compression for different preloads were carried out. By comparing the experiment results, numerical calculations based on the finite element method (FEM) and the semi-analytical method (SAM) of solution were performed. The computations were executed with the use of full material characteristics with consideration of large strains and deflections. Furthermore, while observing the deformation of columns, a non-contact Digital Correlation ARAMIS® system was employed whose calculated results of deformations are very close to the results of the numerical method. The paper revealed that maximum recorded loads under temperature rise are comparable regardless of a value of initial load. A good correlation in results between used methods was achieved. The main goal of the present work was to assess of behavior of thin-walled compressed steel columns in a temperature-controlled environment till their full damage.
Highlights
Low-carbon steel DC01 is a material commonly applied in industry to elementary elements for the purposes accessibility and lower price
It can be stated that the behavior of any structures under thermal load can differ from the behavior under mechanical loads, dependent upon work temperature as given in reference [1]
These works show the use of the Digital Image Correlation (DIC) technique to investigate the thermal buckling of circular laminated composite or aluminum plate subjected to a uniform distribution of temperature load
Summary
Low-carbon steel DC01 is a material commonly applied in industry to elementary elements for the purposes accessibility and lower price. Fang and Chan in their paper [6] studied S460 steel columns under axial compression due to elevated temperature by the use of the finite element method. They performed the compression of those columns experimentally but at the ambient temperature. It was revealed that initial loads an essential investigations were analyzed withof regard to thermal post-buckling behavior of thehave columns. It was influence on the equilibrium paths. Revealed that initial loads have an essential influence on the equilibrium paths
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