Study of Seismic Behaviour of Bent Shear Panel Dampers in Braced Steel Moment Resistant Frame

Shear Panel Dampers (SPDs) can be mounted vertically in frames to effectively increase its load bearing capacity and ductile performance. Through plastic deformation, SPD can dissipate the energy in the frames under seismic conditions. Vertically installed dampers may impose an additional bending moment on the middle of the primary beam, which results in significant damage of the concrete slab. A novel type of SPDs with bent web panels (BSPDs) were developed to overcome this limitation, where the end plate of the Bent Shear Panel Damper (BSPD) is connected to the web of the beam. Here, the bending moment resulting from the SPDs can be minimized, thereby reducing the damages caused to the concrete slab. The aim of introducing BSPD in a braced steel moment resistant frame (SMRF) is to enhance the seismic resilience of the braced SMRF. This study involves the design, optimisation, and assessment of the damper’s performance under seismic loading. Finite element analysis software ANSYS was used for the analysis and optimization of the damper. The design parameters include the thickness, length, and breadth of the damper. The goal of the optimization is to achieve the best energy dissipation performance. The stress, strain, and deformation properties of the dampers under seismic load are assessed. After the optimization of damper, time hysteresis analysis was done by installing the damper in a 5 storied frame.