Experimental investigation on the compressive behaviour of foam concrete light steel keel composite wall

Abstract

This study aims to explore a new load-bearing structure of foam concrete-light steel keel (FCLS) composite wall. Compared with the traditional beam-column frame structure, this structure has the characteristics of lightweight, thermal insulation, sound insulation, fire resistance, etc. and has better Carrying capacity. The compression performance of 10 FCLS composite walls was studied in depth by conducting axial and eccentric compression tests. The effect of the spacing of foam concrete, middle horizontal steel and self-tapping screws on the compressive bearing capacity of the middle column of FCLS composite wall under compressive load was investigated. The results showed that the bearing capacity of the composite wall filled with foam concrete increased by 70%-80%, while reducing the spacing of self-tapping screws could increase the bearing capacity by 5%-6%. In addition, the tie bar settings have little impact on the bearing capacity. Based on these influencing factors and through the analysis of test data, the calculation formula for the bearing capacity of the composite wall was obtained, and the effectiveness of the method was verified.

Keywords

• fcls composite wall
• thin-walled cold-formed(twcf) steel
• composite wall
• compression tests
• design method