Shear Resistance And Hysteretic Behavior Of Steel Plate Wall Connected To Beam-column Joints

Thin steel plate shear wall having large lateral stiffness and good seismic performance, where the tension field generally forms in the infill steel plate to continually resist the horizontal load after buckling, have been widely applied in North America and Japan. The full connected thin steel plate shear wall essentially results in a large additional action to the columns. Thus, the columns with larger flexural stiffness are actually required with more additional construction cost. Some types of the steel plate walls have been proposed, such as the slotted steel plate shear wall and the shear wall only connected to beams, to reduce the stiffness requirement for the columns. But the shear resistance and energy dissipation performance significantly drop. To further improve the behavior of the embedded steel plate, and effectively reduce the stiffness requirement for the columns, this paper proposes a novel steel plate shear wall where the steel plate is only connected to beam-column joints. In addition, the mechanical properties and hysteresis performance of the non-stiffening and stiffening steel plate wall is also investigated respectively. The main research works are as follows:The shear resistance of non-stiffening thin steel plate wall was examined. The mechanical behavior of the unstiffened thin steel plate wall was evaluated under the monotonic load; The minimum bending stiffness requirement for the columns of the full connected shear wall and the shear wall only connected to beam-column joints were studied respectively. It shows that the later can apparently reduce the minimum stiffness demand; Based on the “equivalent diagonal strut” model, a modified method is proposed to predict the shear resistance of the novel shear wall where the buckling of the infill steel plate is taken into account. The influence of geometric parameters, including slenderness ratio and aspect ratio of the infill panel, on the behavior of the proposed steel shear wall are investigated.Hysteretic behavior of non-stiffening thin steel walls was analyzed. Based on a hysteresis loop and whole loading process as a benchmark, the force mechanism of non-stiffening thin steel walls under cyclic load was studied; Geometric parameters that influenced the hysteretic behavior of thin steel plate wall were analyzed, showed that the high thickness ratio and span depth ratio were the key factors to influence the hysteretic performance, need to be reasonable designed.Static shear behavior of stiffening thin steel plate wall was analyzed. In order to improve the buckling load and inhibit the outer surface deformation, put forward setting stiffeners to the thin steel wall, and the mechanical properties of different layouts of the stiffening rib under monotonic loading was searched,and given to its optimized stiffener arrangements; According to the optimized stiffener layout, its elastic buckling properties and shear static performance were studied, results showed that diagonally stiffening rib along diagonal part and horizontal stiffening rib along the unconstrained steel plate, significantly improved the bearing capacity and inhibited the deformation; Considering mechanical property of thin steel wall, based on the superposition principle, the ultimate bearing capacity was deduced for design reference.Hysteretic behavior of the stiffening thin steel walls was analyzed. The force performance of the stiffening steel plate walls under cyclic loading were studied, and the properties of steel wall from completed connected and only connected to beam-column joints were studied; Results showed that the former reduced the demand of the frame column stiffness,the bearing capacity was basic fairly with less stiffness degradation and better ductility and energy dissipation performance, met the seismic performance requirements of "strong joint and weak member"; Taking the finite element simulation, the hysteretic behavior under geometric parameters were analyzed, such as stiffness and height to thickness ratio of stiffening rib, the height to thickness and span to depth ratio of steel plate.