Abstract

Multi-celled corrugated-plate concrete-filled steel tubular (MC-CFST) wall is an innovative type of steel–concrete composite wall for achieving lower steel consumption and higher load-resistance efficiency. Experiments on 14 specimens were conducted to investigate the performance of MC-CFST walls under axial compression. The key parameters included wall depth, corrugated cell width and corrugated plate form. The specimens exhibited good ductility and showed similar failure patterns with local buckling on steel tubes and corrugated plates. By analyzing the test results, failure modes and ultimate and residual resistances of the specimens were discussed in detail. In addition, the performance of corrugated plates during the whole loading process was analyzed based on the measured strain results. It can be found that the vertical performance of corrugated plates is the combination of the accordion effect and vertical compression effect, and the horizontal performance is the combination of the overall expansion effect and beam effect. A method for calculating the critical width of corrugated cells was presented. Moreover, the test results were compared with the typical equations specified in several existing design codes. It was found that AISC 360-16, EC4-2004 and GB50936-2014 could safely predict the ultimate resistance of MC-CFST walls, among which the results of GB50936-2014 were the closest to the experimental results.

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