轴 压 荷 载 作 用 下 双 钢 板 -混 凝 土 组 合 剪 力 墙 中钢 板 屈 曲 性 能 研 究

Since the double-skin steel plate concrete composite wall can be used as the lateral force resisting member，there are some advantages，such as high capacity，excellent energy dissipation and favorable ductility. Double-skin steel plate concrete composite walls in high-rise buildings are subjected to vertical loading，but the elastic buckling of steel plate is not allowed. Although the initial geometrical imperfection of steel plate is a critical influencing factor for the buckling stress，it was not considered in the calculation of the buckling stress. The finite element model（FEM）of double-skin composite walls was established by using ABAQUS in consideration of initial geometric imperfection of steel plate. The buckling strain of steel plate，load-displacement curves and failure modes obtained by FEM matched well with those from the test. The parametric analysis was conducted to study the influence of initial geometric imperfection，welding spot spacing-to-thickness ratio and steel yielding stress. The equation of steel plate buckling stress accounting for initial geometric imperfections was proposed.