Shear bearing capacity calculation and influence factors analysis of composite wall with SRC grid

SRC grid composite wall is proposed by combining the original RC multi-grid composite wall with steel.In the case of SRC grid composite wall,the grids are reinforced by light steel instead of longitudinal steel bars for original RC multi-grid composite wall.Rigid connection of the node is realized by welding steel of grid beam and column,and semi-rigid connection of the node is realized through bolts connection of steel of grid beam and column.Formula of shear load-carrying capacity for SRC grid composite wall was proposed based on the model tests and nonlinear finite element analysis.Influence parameters such as steel ratio of grid,strength of light steel and so on were investigated through finite element analysis.It is shown that result of the proposed formula of shear load-carrying capacity agrees well with that of nonlinear finite element analysis.The proposed formula is well suited for the accuracy demand when changing influence parameters like steel ratio of grid.The shear bearing capacity of the wall can be increased effectively by increasing the strength of light steel or steel ratio in the grid beams,rather than increasing the strength of the concrete alone.