Tao Muxuan

Nonlinear Finite-Element Analysis of Double-Skin Steel-Concrete Composite Shear Wall Structures

Shear wall structures have been widely used in high-rise buildings due to their good lateral resistant behavior. As a new type of shear wall structure, the double-skin steel-concrete composite shear wall has high loading capacity, superior ductility and good crack resistant behavior. The mechanical properties of the composite walls need to be further studied. Based on the general FE package MSC.Marc(2005r2), an elaborate finite element analysis of the double-skin steel-concrete composite shear wall is conducted to simulate the whole-process behavior of the shear wall. The load-displacement relationship is obtained, and the slippage characteristic of the steel plate-concrete interface is also intensively investigated through enforcing the spring elements at the interface. Finally, the influence of the axial compression ratio and the steel plate thickness is presented by a parametric analysis. The conclusions drawn from the analysis are that the maximum slippage of the shear wall occurs at the tension side of the wall bottom where the concrete cracks and the axial force-moment curve has a parabolic property. The relevant conclusions are useful for the routine design practice of tall buildings.