冷弯薄壁型钢双层组合墙体抗剪性能试验研究

Composite wall in the cold-formed thin-walled steel structure house has a good shear performance. When the double-layer composite wall is applied, the weak part is located at the floor connection, which becomes the failure under reciprocating loads. Considering the axial pressure of different walls and different types of anchor bolts, a total of 9 double-storey wall in three groups were tested for shearing performance. The research results showed that the energy consumption and ductility of the wall are worse than the single wall. The out-of-plane instability of the joints along the floors or buckling failure of the floor beams often occur, and the construction of the floor joints is the key to the bearing of structures. The effect of the inner layer of the strip on the shear capacity of the double wall is not obvious. The out-of-plane displacement occurs at the floor joint, the stiffness and bearing capacity will suddenly drop, and the random out-of-plane instability will increases with the increase of the axial pressure. It is not obvious to improve the out-of-plane stability of the wall only by using struts to increase the vertical compressive capacity of the floor. Double-nuts anti-pulling bolt has obvious effects on improving the bearing capacity of the wall. It was suggested that this kind of anchor bolt could be used at the floor connection of such multi-storey buildings, which can effectively improve the shear resistance of walls.