Experimental and theoretical study on axial compression behavior of cold-formed thin-walled steel-bamboo scrimber composite columns

ABSTRACT

The failure mode and mechanism of composite columns are investigated by subjecting nine cold-formed thin-walled steel bamboo scrimber (CFTW-BS) composite columns, one square tube steel (STS) column, and one hollow bamboo scrimber square (HBSS) column to axial compression during the experiment. An analysis is conducted to evaluate the impact of the type and thickness of cold-formed thin-walled steel (CFTWS), thickness of bamboo scrimber (BS), and slenderness ratio on the axial compression carrying capacity of composite columns. The results indicate that steel-bamboo composite columns exhibit excellent carrying capacity and ductility, with a favorable associative effect. The ultimate carrying capacity of these composite columns is observed to increase with an increase in the net cross-sectional area and decrease with an increase in the slenderness ratio. According to the influence factors and combined effect of materials, modifications are made to the bearing capacity, and the formula for calculating the carrying capacity under axial compression is proposed. The experimental results are highly consistent with the theoretical results.

KEYWORDS:

• Bamboo scrimber
• cold-formed thin-walled steel
• composite column
• axial compression performance
• bearing capacity

Disclosure statement

No potential conflict of interest was reported by the authors.