Experimental Study on Bond Performance of Composite Wall With Single Row of Steel Bars and Polystyrene Module

To solve the problem that the insulation and decoration layers are easy to peel and fall from the external wall, the composite wall with single row of steel bars and polystyrene module was proposed. To study the bond performance, the shear test under the low cyclic loading and the vertical drawing test were carried out. In the shear test under the low cyclic loading, there was no descending section for hysteretic loops. The positive bearing capacity increased by 13.75% and the initial stiffness increased by 21.01%. The positive bearing capacity increased by 28.27% and the initial stiffness increased by 44.49%, respectively, by adding the cross structures and the L-shaped steel bars. The energy dissipation capacity was better by adding steel bars than only by installing cross structures. In the vertical drawing test, the pulling force increased by 4.78% by installing cross structures, and the pulling force increased by 13.95% by installing cross structures and the steel bars. Results show that specimens are all stripped from the surface of EPS module and destroyed finally. The mechanical bite force between the swallow tail trough and concrete has the greatest influence on the bond performance. The cross structures and steel bars strengthen the integrity of the outer protective layer and module, and have great influence on the damage characteristics. Cross structures can support formwork, fix module and outer protective layer. Steel bars improve the bearing capacity and strengthen the integrity.