Abstract:
Steel plate shear wall is an efficient lateral load resisting system. It provides good energy dissipation capacity in medium and high rise buildings which is very important for high seismic areas. The system consists of steel infill plates connected to the surrounding horizontal beam and vertical column. Steel plate shear wall is well suited for new construction and also used for seismic upgrading of existing structure. Although significant number buildings are now constructed using this technology; the design tend to be very conservative as the behavior of this system is not easily understood. Though lots of analytical and experimental investigations are performed, required parametric enquiries are not fully available, hence appropriate design recommendations are limited.
The aim of the research is to investigate the effect of key parameters on the behavior of steel plate shear wall. Prior to parametric analysis a three storied reference experimental model was modelled with commercial finite element software ABAQUS using static stress displacement formulation. Kinematic hardening material model was used to incorporate material nonlinearity. The performance of the model was evaluated by comparing its monotonic and cyclic prediction with experimental results.
The parametric study of steel plate examines the effect of varying shear wall aspect ratio, shear wall thickness and varying stiffness of vertical boundary element. It has been observed that, aspect ratio and the plate thickness have mutual effect on steel plate shear wall system. Capacity and the stiffness of the system can be improved significantly by increasing the thickness of the plate. However, beyond the certain thickness (10 mm) capacity increasing becomes saturated (wide shear wall). Study finds that, relationship between the column flexibility parameter and the capacity of the shear wall is linear. Numerical study is also conducted for horizontally stiffened steel plate shear wall, it is evident form the analysis that, stiffener application is effective only for narrow tall shear wall.
