Research on the bearing capacity of foam concrete wall materials in green buildings

Abstract

The study fabricated a combined wall with the help of lightweight steel structural wall skeleton and foam concrete and designed four sets of strain experiments for walls with different foam concrete densities (FC) and steel content, and analysed the relationship between the wall parameters and shear strength with finite element software. In the displacement results, the higher the density of FC, the higher the load-bearing capacity. When the density of foam concrete is 1000 kg/m 3 and 1600 kg/m 3 , the wall will lose its load carrying capacity after a maximum load of 80 KN and 90 KN respectively. The greater the axial compression ratio of the sample, the greater the shear capacity of the combined wall. When the displacement distance is 30 mm, the maximum load is 162 KN, 110 KN, 94 KN and 85 KN when the shear span ratio is 1.0, 2.0, 3.0 and 4.0 respectively, and the load carrying capacity decreases with the increase of the shear span ratio, and compared with the shear span ratio of 1.0, the load carrying capacity decreases by 23%, 41% and 51% successively. The maximum loads of the combined walls were 88 KN, 79 KN, 81 KN and 62 KN when the densities were 800, 1000, 1200 and 1600, respectively; and 75 KN, 80 KN, 81 KN, 94 KN and 101 KN when the steel content ratios were 0.5, 1.0, 1.5, 2.0 and 2.5, respectively. The higher the steel content, the greater the bearing capacity of the wall, it is expected that the parameters obtained from this study and the change rule of wall load carrying capacity can provide a certain reference basis for the construction project and accelerate the realisation of green building materials.